Amazon Linux 2023 : rsync, rsync-daemon (ALAS2023-2026-3131)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2023 Security Advisory ALAS2023-2026-3131.
##

include('compat.inc');

if (description)
{
  script_id(351050);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/29");

  script_cve_id(
    "CVE-2026-29518",
    "CVE-2026-43617",
    "CVE-2026-43619",
    "CVE-2026-43620",
    "CVE-2026-45232",
    "CVE-2026-53783",
    "CVE-2026-53784",
    "CVE-2026-53785",
    "CVE-2026-53786",
    "CVE-2026-53788",
    "CVE-2026-53789",
    "CVE-2026-53790",
    "CVE-2026-53791",
    "CVE-2026-53792",
    "CVE-2026-53793",
    "CVE-2026-53794",
    "CVE-2026-53795",
    "CVE-2026-53796",
    "CVE-2026-53797",
    "CVE-2026-53798",
    "CVE-2026-53799",
    "CVE-2026-53800",
    "CVE-2026-53801",
    "CVE-2026-53802",
    "CVE-2026-53803",
    "CVE-2026-70452",
    "CVE-2026-70453",
    "CVE-2026-70454",
    "CVE-2026-70456",
    "CVE-2026-70457",
    "CVE-2026-70458",
    "CVE-2026-70459",
    "CVE-2026-70460",
    "CVE-2026-70461",
    "CVE-2026-70462",
    "CVE-2026-70463",
    "CVE-2026-70464"
  );
  script_xref(name:"IAVA", value:"2026-A-0502");
  script_xref(name:"IAVA", value:"2026-A-0906");

  script_name(english:"Amazon Linux 2023 : rsync, rsync-daemon (ALAS2023-2026-3131)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux 2023 host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-3131 advisory.

    Rsync versions before 3.4.3 contain a time-of-check to time-of-use (TOCTOU) race condition in daemon file
    handling that allows attackers to redirect file writes outside intended directories by replacing parent
    directory components with symbolic links. Attackers with write access to a module path can exploit this
    race condition to create or overwrite arbitrary files, potentially modifying sensitive system files and
    achieving privilege escalation when the daemon runs with elevated privileges. This vulnerability can only
    be triggered if the chroot setting is false. (CVE-2026-29518)

    Rsync version 3.4.2 and prior contain an authorization bypass vulnerability in the rsync daemon's
    hostname-based access control list enforcement when configured with chroot. Attackers can bypass hostname-
    based deny rules by controlling the PTR record for their source IP address, allowing connections from
    hostnames that administrators intended to deny when reverse DNS resolution fails and defaults to UNKNOWN.
    (CVE-2026-43617)

    Rsync version 3.4.2 and prior contain symlink race condition vulnerabilities in path-based system calls
    including chmod, lchown, utimes, rename, unlink, mkdir, symlink, mknod, link, rmdir, and lstat that allow
    local attackers to redirect operations to files outside the exported rsync module. Attackers with local
    filesystem access can exploit the timing window between path resolution and syscall execution by swapping
    symlinks to apply sender-supplied permissions, ownership, timestamps, or filenames to arbitrary files
    outside the intended module boundary on rsync daemons configured with 'use chroot = no'. (CVE-2026-43619)

    Rsync version 3.4.2 and prior contain a receiver-side out-of-bounds array read vulnerability in
    recv_files() in receiver.c that allows a malicious rsync server to crash the rsync client process.
    Attackers can exploit the vulnerability by setting CF_INC_RECURSE in compatibility flags and sending a
    specially crafted file list where the first sorted entry is not the leading dot directory, followed by a
    transfer record with ndx=0 and an iflag word without ITEM_TRANSFER, causing the receiver to read 8 bytes
    before the allocated pointer array and dereference an invalid pointer at an unmapped address, resulting in
    a deterministic SIGSEGV crash of the rsync client. (CVE-2026-43620)

    Rsync versions before 3.4.3 contain an off-by-one out-of-bounds stack write vulnerability in the
    establish_proxy_connection() function in socket.c that allows network attackers to corrupt stack memory by
    sending a malformed HTTP proxy response. Attackers can exploit this by positioning themselves between the
    client and proxy or controlling the proxy server to send a response line of 1023 or more bytes without a
    newline terminator, causing a null byte to be written to an out-of-bounds stack address when the
    RSYNC_PROXY environment variable is set. (CVE-2026-45232)

    rsync before 3.5.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability in the
    rrsync restricted shell wrapper that allows authenticated clients to escape enforced directory
    restrictions by substituting a symlink for a path component after validation but before transfer
    processing. Attackers can additionally leverage unrestricted flags such as --copy-unsafe-links, -D, and
    --log-file through rrsync to read or write files outside the permitted directory subtree.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-53783)

    rsync before 3.5.0 contains a path traversal vulnerability that allows remote clients to access files
    outside the intended module root when use chroot is disabled and the module root path or a component of it
    is a symlink. The daemon calls chdir() to the module root at session initialization without resolving
    symlinks via realpath() or equivalent, causing subsequent relative-path operations to reference files
    relative to the symlink target rather than the intended module root, enabling unauthorized file access.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-53784)

    rsync before 3.5.0 contains a path traversal vulnerability that allows a malicious sender to write files
    outside the intended destination directory tree by crafting relative paths with symlink components in
    --relative mode. The make_path() function follows symlinks pointing outside the destination tree while
    creating intermediate directories without verifying that created paths remain within the destination
    boundary, enabling arbitrary file writes on the receiver's filesystem.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-53785)

    rsync before 3.5.0 contains a filter rule bypass vulnerability that allows authenticated clients to
    override module-level filter restrictions by supplying malicious --filter merge file directives. Attackers
    can inject client-side merge file directives during filter evaluation to introduce rules that supersede
    daemon module-level restrictions, gaining access to files the module filter was intended to exclude.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-53786)

    rsync before 3.5.0 contains a newline injection vulnerability in the name-converter uid/gid mapping
    interface that allows local attackers to forge protocol messages by creating user or group names
    containing newline characters. Attackers can inject malicious newline characters into names communicated
    over the pipe-based line-oriented protocol to cause the rsync daemon to process attacker-influenced data
    as legitimate protocol input, corrupting uid/gid mapping logic.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-53788)

    rsync before 3.5.0 contains an improper path handling vulnerability that allows a malicious sender to
    expand the scope of --delete operations beyond the intended destination subtree by sending a crafted file
    list that causes rsync to reclassify implied parent directory entries or treat synthetic paths as the
    transfer root. Attackers can exploit multiple variants including implied parent reclassification,
    synthetic root path construction, legacy protocol behavior below version 30, and non-directory root
    handling to cause the receiver to delete files outside the authorized destination directory.
    (CVE-2026-53789)

    rsync before 3.5.0 contains multiple command and argument injection vulnerabilities that allow attackers
    to execute arbitrary commands by supplying malicious input through several code paths, including the
    RSYNC_CONNECT_PROG environment variable, daemon hooks, the rsync-ssl wrapper, and remote-shell command
    newline injection. Attackers can inject shell metacharacters or newline characters into unsanitized user-
    supplied values such as hostnames and hostspecs to execute arbitrary commands under the privileges of the
    rsync process or the invoking user.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-53790)

    rsync daemon before 3.5.0 contains an IP address spoofing vulnerability that allows unauthenticated remote
    attackers to bypass IP-based access controls by sending a crafted PROXY protocol header with a forged
    source address. Attackers who can connect directly to the rsync daemon can inject a spoofed source IP in
    the PROXY protocol header to circumvent hosts allow/deny rules, gaining unauthorized access that would
    otherwise be blocked based on their real source address.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-53791)

    rsync before 3.5.0 contains an out-of-bounds read vulnerability in the sender-side block matching logic
    that allows a malicious receiver to trigger memory access before the start of an allocated buffer by
    sending a crafted checksum block with a length of zero. Attackers can send a specially crafted checksum
    set containing a zero-length block to cause a negative offset calculation during delta computation,
    resulting in an out-of-bounds read of file data buffer memory on the sender side.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-53792)

    rsync before 3.5.0 contains a path confinement bypass vulnerability that allows remote clients to escape
    the intended inner-module root confinement by constructing paths that resolve outside the chroot boundary
    when the module root contains a /./ boundary marker. Attackers can exploit improper handling of the /./
    notation or forge delta-basis transfers referencing xname paths that cross the /./ boundary to gain
    unauthorized read or write access to files outside the module's subtree.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-53793)

    rsync before 3.5.0 contains a logic error in --max-alloc handling that allows a sender or configuration
    setting --max-alloc=0 to disable allocation sanity checks entirely rather than enforcing a zero-byte cap.
    Attackers can exploit this flaw to cause the receiver to attempt unbounded memory allocations for file
    list and data structures, potentially exhausting available memory and causing a denial of service.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-53794)

    rsync before 3.5.0 contains an arbitrary file write vulnerability that allows attackers to write files
    outside the intended destination tree by specifying an absolute path via --temp-dir or --link-dest
    options. The rename-confinement logic is bypassed when these options resolve to paths outside the
    destination tree, enabling attacker-controlled values to write files to arbitrary locations accessible to
    the rsync process. (CVE-2026-53795)

    rsync before 3.5.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability in the
    non-daemon receiver's destination directory handling that allows an attacker who can manipulate
    destination path parent components to redirect file writes to unintended locations. Attackers can
    substitute a symlink for a component of the destination path between the path resolution and chdir() call,
    causing the receiver's working directory to be established outside the intended destination tree so that
    subsequent relative-path file writes land in unintended filesystem locations.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-53796)

    rsync before 3.5.0 contains a symlink race condition vulnerability in the sender's source tree traversal
    that allows an attacker who can manipulate a parent directory of the source tree to redirect file reads to
    unintended paths. Attackers can atomically replace a parent directory component with a symlink pointing
    outside the source root between path resolution and file open operations to disclose file contents outside
    the intended transfer root.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-53797)

    rsync before 3.5.0 contains a privilege confusion vulnerability in the name-converter subprocess uid/gid
    mapping that allows local attackers to cause transferred files to be owned by root by influencing name-
    converter responses to return empty values. When the name-converter subprocess returns an empty response
    for a uid or gid lookup, rsync incorrectly interprets it as a successful resolution to uid/gid 0 (root)
    rather than a lookup failure, and if the name-converter also signals fake super-user status, rsync
    proceeds with root ownership assignments for transferred files.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-53798)

    rsync before 3.5.0 contains a symlink race condition vulnerability that allows local attackers to cause
    rsync to apply arbitrary ACLs or extended attributes to unintended files by substituting a symlink at a
    predictable destination path between the file write and the subsequent acl_set_file() or lsetxattr() call.
    Attackers can exploit this timing window to redirect ACL and xattr application through a crafted symlink
    to files outside the intended destination tree, potentially granting elevated permissions and enabling
    local privilege escalation.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-53799)

    rsync before 3.5.0 contains a symlink race condition vulnerability in the --remove-source-files feature
    that allows attackers with symlink creation access to cause arbitrary file deletion. Attackers can
    atomically substitute a symlink for a source file between transfer completion and the unlink() call,
    causing rsync to delete the symlink target rather than the intended source file.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-53800)

    rsync before 3.5.0 contains a symlink race condition vulnerability in the sender's directory scanning
    logic that allows attackers to cause the sender to enumerate and transfer files outside the module root's
    intended subtree. Attackers who can create or manipulate symlinks in a path component of the scanned tree
    can replace a symlink with a directory entry pointing outside the module root between the lstat() call and
    the subsequent opendir() call, exposing files beyond the intended root in both daemon-mode and non-daemon
    sender-side scanning.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-53801)

    rsync before 3.5.0 contains an arbitrary file read vulnerability that allows attackers to read files
    accessible to the rsync daemon process by exploiting symlink following in input configuration file
    handling including --files-from, --password-file, and filter merge files. Attackers can place a symlink at
    a predictable --files-from or --password-file path, or supply a --files-from path that escapes the daemon
    module root, to read arbitrary files accessible to the rsync process.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-53802)

    rsync before 3.5.0 contains a symlink following vulnerability that allows local attackers to overwrite
    arbitrary files by placing a symlink at a predictable output path such as --log-file, --write-batch, or
    daemon-mode log and statistics paths. Attackers can exploit rsync's failure to reject symlinks during
    ancillary file writes to redirect output to arbitrary filesystem locations, achieving local privilege
    escalation on installations where rsync runs with elevated privileges such as setuid or privileged daemon
    configurations.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-53803)

    rsync 3.1.0 before 3.5.0 contains an access control bypass vulnerability that allows remote attackers to
    circumvent hosts deny rules by inducing DNS resolution failures during hostname-based access control
    evaluation. When a DNS lookup for a hostname-based deny rule fails, the daemon skips the rule rather than
    defaulting to a deny decision, enabling attackers who can trigger DNS failures to bypass module-level IP
    access controls and gain unauthorized access to restricted module file trees.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-70452)

    rsync before 3.5.0 contains an algorithmic complexity vulnerability in the hash_search() function that
    allows a remote attacker to cause a denial of service by delivering a carefully constructed file list. A
    sender can exploit the quadratic-time worst-case behavior in hash lookups to exhaust receiver CPU
    resources with a modest number of crafted entries, causing a sustained denial of service.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-70453)

    rsync 3.2.0 through 3.2.3 (openssl mode) and rsync-ssl through 3.4.4 (stunnel mode) contain a TLS
    certificate validation vulnerability that allows on-path attackers to intercept encrypted sessions by
    presenting self-signed or otherwise invalid certificates. Attackers can exploit the failure to validate
    server TLS certificates against a trusted CA or verify certificate hostname matching to decrypt or tamper
    with rsync session content without detection by the client.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-70454)

    rsync 3.0.1 before 3.5.0 contains an out-of-bounds write vulnerability in the read_args() function that
    allows a malicious sender to corrupt adjacent heap memory by sending a crafted argument list. When the
    argument count causes the argv allocation to be exactly full, the trailing NULL terminator is written one
    slot beyond the allocation boundary, corrupting adjacent heap memory.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-70456)

    rsync 3.2.3 before 3.5.0 contains an out-of-bounds write in parse_size_arg() where the return value of
    snprintf() is used directly as an index into a .bss-segment array without bounds checking. When snprintf
    truncates the formatted size string, the return value equals the number of characters that would have been
    written including the truncated portion, and this value may exceed the array length. The subsequent
    indexed write targets memory outside the intended array bounds, corrupting .bss memory.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-70457)

    rsync 3.0.0 before 3.5.0 contains an out-of-bounds write vulnerability that allows attackers to corrupt
    memory by triggering HLINK_BUMP processing on file entries with the FLAG_HLINKED flag set while the hard-
    link preservation option is inactive. Attackers can exploit the missing F_SUM field in the file_struct
    layout to access memory past the end of the allocated structure, corrupting adjacent heap or stack data.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-70458)

    rsync 3.0.0 before 3.5.0 contains a null pointer dereference vulnerability in the daemon child process
    that allows remote attackers to crash the daemon by sending a file list whose first entry is a dot entry
    not typed as a directory. The daemon dereferences the first file list entry as a directory structure
    pointer without verifying the entry type, resulting in an invalid or uninitialized pointer dereference
    that terminates the client connection.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-70459)

    rsync 2.3.3 before 3.5.0 contains a path traversal vulnerability that allows a malicious sender to escape
    the module root by exploiting symlinks within the module file tree when using --partial-dir or --backup-
    dir options. Attackers with write access to place a symlink under the module root, or who can exploit a
    pre-existing trusted symlink, can direct file writes to locations outside the intended module root,
    achieving arbitrary file write relative to the module root parent. (CVE-2026-70460)

    rsync 3.2.5 before 3.5.0 contains a heap out-of-bounds write vulnerability that allows remote
    unauthenticated attackers to write one attacker-controlled byte past the end of a heap allocation by
    supplying a crafted files-from entry. Attackers can trigger the vulnerability against a read-only rsync
    daemon module by providing a files-from entry containing both an interior and trailing backslash, causing
    the add_implied_include() function to under-count the trailing backslash when sizing the destination
    buffer.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-70461)

    rsync 3.1.0 before 3.5.0 contains a signed integer overflow vulnerability in the I/O timeout
    implementation that allows attackers to permanently disable connection timeouts by injecting
    MSG_IO_TIMEOUT messages carrying non-positive (zero or negative) values. Attackers can craft malicious
    MSG_IO_TIMEOUT messages that cause the timeout variable to wrap to a non-positive value, preventing the
    timeout check from firing and enabling idle or stalled connections to hold daemon slots indefinitely,
    leading to resource exhaustion.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-70462)

    rsync 3.1.0 before 3.5.0 contains an authorization bypass in auth users directive parsing. The auth users
    parser uses comma-only tokenization when splitting the user list, which fails to correctly handle entries
    of the form @Group Name where the group name contains a space. The space within the group name causes the
    parser to split the entry at the space boundary, discarding the deny rule associated with the group. An
    authenticated user whose username or group membership would be denied by an @Group Name auth users entry
    can connect to a restricted module because the deny rule is silently discarded during parsing.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-70463)

    rsync daemon 2.0.0 before 3.5.0 contains a denial of service vulnerability that allows unauthenticated
    remote attackers to exhaust daemon connection slots by stalling the handshake process before or after
    module selection without triggering the I/O timeout. Attackers can open many simultaneous connections and
    trickle data at the minimum rate to avoid timeout, or stall entirely before module selection where no
    timeout applies, consuming all available connection slots and denying service to legitimate clients.

    NOTE: https://download.samba.org/pub/rsync/NEWS#3.5.0 (CVE-2026-70464)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
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  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/faqs.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-29518.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-43617.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-43619.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-43620.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-45232.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-53783.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-53784.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-53785.html");
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  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-53788.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-53789.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-53790.html");
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  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-53793.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-53794.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-53795.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-53796.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-53797.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-53798.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-53799.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-53800.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-53801.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-53802.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-53803.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-70452.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-70453.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-70454.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-70456.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-70457.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-70458.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-70459.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-70460.html");
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  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-70464.html");
  script_set_attribute(attribute:"solution", value:
"Run 'dnf update rsync --releasever 2023.12.20260928' or
  or 'dnf update --advisory ALAS2023-2026-3131 --releasever 2023.12.20260928' to update your system.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:P");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-53789");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-70457");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2026-70460");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/05/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/29");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rsync");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rsync-daemon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rsync-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rsync-debugsource");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2023");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Amazon Linux Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/rpm-list");

  exit(0);
}

include("rpm2.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

var alas_release = get_kb_item("Host/AmazonLinux/release");
if (isnull(alas_release) || !strlen(alas_release)) audit(AUDIT_OS_NOT, "Amazon Linux");
var os_ver = pregmatch(pattern: "^AL(A|\d+|-\d+)", string:alas_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "-2023")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux 2023", "Amazon Linux " + os_ver);
}

if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

var pkgs = [
    {'reference':'rsync-3.5.1-1.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rsync-3.5.1-1.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rsync-daemon-3.5.1-1.amzn2023.0.1', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rsync-debuginfo-3.5.1-1.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rsync-debuginfo-3.5.1-1.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rsync-debugsource-3.5.1-1.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rsync-debugsource-3.5.1-1.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var reference = NULL;
  var _release = NULL;
  var sp = NULL;
  var _cpu = NULL;
  var el_string = NULL;
  var rpm_spec_vers_cmp = NULL;
  var epoch = NULL;
  var allowmaj = NULL;
  var exists_check = NULL;
  var cves = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
  if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (!empty_or_null(package_array['cves'])) cves = package_array['cves'];
  if (reference && _release && (!exists_check || rpm_exists(release:_release, rpm:exists_check))) {
    if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj, cves:cves)) flag++;
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "rsync / rsync-daemon / rsync-debuginfo / etc");
}