8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
0.011 Low
EPSS
Percentile
84.4%
The version of git installed on the remote host is prior to 2.38.1-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2022-2022-254 advisory.
Git is an open source, scalable, distributed revision control system. Versions prior to 2.30.6, 2.31.5, 2.32.4, 2.33.5, 2.34.5, 2.35.5, 2.36.3, and 2.37.4 are subject to exposure of sensitive information to a malicious actor. When performing a local clone (where the source and target of the clone are on the same volume), Git copies the contents of the source’s $GIT_DIR/objects
directory into the destination by either creating hardlinks to the source contents, or copying them (if hardlinks are disabled via --no- hardlinks
). A malicious actor could convince a victim to clone a repository with a symbolic link pointing at sensitive information on the victim’s machine. This can be done either by having the victim clone a malicious repository on the same machine, or having them clone a malicious repository embedded as a bare repository via a submodule from any source, provided they clone with the --recurse-submodules
option.
Git does not create symbolic links in the $GIT_DIR/objects
directory. The problem has been patched in the versions published on 2022-10-18, and backported to v2.30.x. Potential workarounds: Avoid cloning untrusted repositories using the --local
optimization when on a shared machine, either by passing the --no-local
option to git clone
or cloning from a URL that uses the file://
scheme. Alternatively, avoid cloning repositories from untrusted sources with --recurse-submodules
or run git config --global protocol.file.allow user
. (CVE-2022-39253)
Git is an open source, scalable, distributed revision control system. git shell
is a restricted login shell that can be used to implement Git’s push/pull functionality via SSH. In versions prior to 2.30.6, 2.31.5, 2.32.4, 2.33.5, 2.34.5, 2.35.5, 2.36.3, and 2.37.4, the function that splits the command arguments into an array improperly uses an int
to represent the number of entries in the array, allowing a malicious actor to intentionally overflow the return value, leading to arbitrary heap writes. Because the resulting array is then passed to execv()
, it is possible to leverage this attack to gain remote code execution on a victim machine. Note that a victim must first allow access to git shell
as a login shell in order to be vulnerable to this attack. This problem is patched in versions 2.30.6, 2.31.5, 2.32.4, 2.33.5, 2.34.5, 2.35.5, 2.36.3, and 2.37.4 and users are advised to upgrade to the latest version.
Disabling git shell
access via remote logins is a viable short-term workaround. (CVE-2022-39260)
Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2022 Security Advisory ALAS2022-2022-254.
##
include('compat.inc');
if (description)
{
script_id(168554);
script_version("1.2");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/12/09");
script_cve_id("CVE-2022-39253", "CVE-2022-39260");
script_name(english:"Amazon Linux 2022 : git (ALAS2022-2022-254)");
script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux 2022 host is missing a security update.");
script_set_attribute(attribute:"description", value:
"The version of git installed on the remote host is prior to 2.38.1-1. It is, therefore, affected by multiple
vulnerabilities as referenced in the ALAS2022-2022-254 advisory.
- Git is an open source, scalable, distributed revision control system. Versions prior to 2.30.6, 2.31.5,
2.32.4, 2.33.5, 2.34.5, 2.35.5, 2.36.3, and 2.37.4 are subject to exposure of sensitive information to a
malicious actor. When performing a local clone (where the source and target of the clone are on the same
volume), Git copies the contents of the source's `$GIT_DIR/objects` directory into the destination by
either creating hardlinks to the source contents, or copying them (if hardlinks are disabled via `--no-
hardlinks`). A malicious actor could convince a victim to clone a repository with a symbolic link pointing
at sensitive information on the victim's machine. This can be done either by having the victim clone a
malicious repository on the same machine, or having them clone a malicious repository embedded as a bare
repository via a submodule from any source, provided they clone with the `--recurse-submodules` option.
Git does not create symbolic links in the `$GIT_DIR/objects` directory. The problem has been patched in
the versions published on 2022-10-18, and backported to v2.30.x. Potential workarounds: Avoid cloning
untrusted repositories using the `--local` optimization when on a shared machine, either by passing the
`--no-local` option to `git clone` or cloning from a URL that uses the `file://` scheme. Alternatively,
avoid cloning repositories from untrusted sources with `--recurse-submodules` or run `git config --global
protocol.file.allow user`. (CVE-2022-39253)
- Git is an open source, scalable, distributed revision control system. `git shell` is a restricted login
shell that can be used to implement Git's push/pull functionality via SSH. In versions prior to 2.30.6,
2.31.5, 2.32.4, 2.33.5, 2.34.5, 2.35.5, 2.36.3, and 2.37.4, the function that splits the command arguments
into an array improperly uses an `int` to represent the number of entries in the array, allowing a
malicious actor to intentionally overflow the return value, leading to arbitrary heap writes. Because the
resulting array is then passed to `execv()`, it is possible to leverage this attack to gain remote code
execution on a victim machine. Note that a victim must first allow access to `git shell` as a login shell
in order to be vulnerable to this attack. This problem is patched in versions 2.30.6, 2.31.5, 2.32.4,
2.33.5, 2.34.5, 2.35.5, 2.36.3, and 2.37.4 and users are advised to upgrade to the latest version.
Disabling `git shell` access via remote logins is a viable short-term workaround. (CVE-2022-39260)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/AL2022/ALAS-2022-254.html");
script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2022-39253.html");
script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2022-39260.html");
script_set_attribute(attribute:"solution", value:
"Run 'yum update git' to update your system.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-39260");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2022/10/18");
script_set_attribute(attribute:"patch_publication_date", value:"2022/12/06");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/12/09");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-all");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-core");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-core-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-core-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-credential-libsecret");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-credential-libsecret-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-cvs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-daemon");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-daemon-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-debugsource");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-email");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-gui");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-instaweb");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-p4");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-subtree");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:git-svn");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:gitk");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:gitweb");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:perl-Git");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:perl-Git-SVN");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2022");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Amazon Linux Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2022 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("rpm.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 != "-2022")
{
if (os_ver == 'A') os_ver = 'AMI';
audit(AUDIT_OS_NOT, "Amazon Linux 2022", "Amazon Linux " + os_ver);
}
if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
var pkgs = [
{'reference':'git-2.38.1-1.amzn2022.0.1', 'cpu':'aarch64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-2.38.1-1.amzn2022.0.1', 'cpu':'i686', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-2.38.1-1.amzn2022.0.1', 'cpu':'x86_64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-all-2.38.1-1.amzn2022.0.1', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-core-2.38.1-1.amzn2022.0.1', 'cpu':'aarch64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-core-2.38.1-1.amzn2022.0.1', 'cpu':'i686', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-core-2.38.1-1.amzn2022.0.1', 'cpu':'x86_64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-core-debuginfo-2.38.1-1.amzn2022.0.1', 'cpu':'aarch64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-core-debuginfo-2.38.1-1.amzn2022.0.1', 'cpu':'i686', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-core-debuginfo-2.38.1-1.amzn2022.0.1', 'cpu':'x86_64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-core-doc-2.38.1-1.amzn2022.0.1', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-credential-libsecret-2.38.1-1.amzn2022.0.1', 'cpu':'aarch64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-credential-libsecret-2.38.1-1.amzn2022.0.1', 'cpu':'i686', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-credential-libsecret-2.38.1-1.amzn2022.0.1', 'cpu':'x86_64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-credential-libsecret-debuginfo-2.38.1-1.amzn2022.0.1', 'cpu':'aarch64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-credential-libsecret-debuginfo-2.38.1-1.amzn2022.0.1', 'cpu':'i686', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-credential-libsecret-debuginfo-2.38.1-1.amzn2022.0.1', 'cpu':'x86_64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-cvs-2.38.1-1.amzn2022.0.1', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-daemon-2.38.1-1.amzn2022.0.1', 'cpu':'aarch64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-daemon-2.38.1-1.amzn2022.0.1', 'cpu':'i686', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-daemon-2.38.1-1.amzn2022.0.1', 'cpu':'x86_64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-daemon-debuginfo-2.38.1-1.amzn2022.0.1', 'cpu':'aarch64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-daemon-debuginfo-2.38.1-1.amzn2022.0.1', 'cpu':'i686', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-daemon-debuginfo-2.38.1-1.amzn2022.0.1', 'cpu':'x86_64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-debuginfo-2.38.1-1.amzn2022.0.1', 'cpu':'aarch64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-debuginfo-2.38.1-1.amzn2022.0.1', 'cpu':'i686', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-debuginfo-2.38.1-1.amzn2022.0.1', 'cpu':'x86_64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-debugsource-2.38.1-1.amzn2022.0.1', 'cpu':'aarch64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-debugsource-2.38.1-1.amzn2022.0.1', 'cpu':'i686', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-debugsource-2.38.1-1.amzn2022.0.1', 'cpu':'x86_64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-email-2.38.1-1.amzn2022.0.1', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-gui-2.38.1-1.amzn2022.0.1', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-instaweb-2.38.1-1.amzn2022.0.1', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-p4-2.38.1-1.amzn2022.0.1', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-subtree-2.38.1-1.amzn2022.0.1', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'git-svn-2.38.1-1.amzn2022.0.1', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'gitk-2.38.1-1.amzn2022.0.1', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'gitweb-2.38.1-1.amzn2022.0.1', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'perl-Git-2.38.1-1.amzn2022.0.1', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
{'reference':'perl-Git-SVN-2.38.1-1.amzn2022.0.1', 'release':'AL-2022', '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;
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 (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)) 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, "git / git-all / git-core / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
amazon | linux | git | p-cpe:/a:amazon:linux:git |
amazon | linux | git-all | p-cpe:/a:amazon:linux:git-all |
amazon | linux | git-core | p-cpe:/a:amazon:linux:git-core |
amazon | linux | git-core-debuginfo | p-cpe:/a:amazon:linux:git-core-debuginfo |
amazon | linux | git-core-doc | p-cpe:/a:amazon:linux:git-core-doc |
amazon | linux | git-credential-libsecret | p-cpe:/a:amazon:linux:git-credential-libsecret |
amazon | linux | git-credential-libsecret-debuginfo | p-cpe:/a:amazon:linux:git-credential-libsecret-debuginfo |
amazon | linux | git-cvs | p-cpe:/a:amazon:linux:git-cvs |
amazon | linux | git-daemon | p-cpe:/a:amazon:linux:git-daemon |
amazon | linux | git-daemon-debuginfo | p-cpe:/a:amazon:linux:git-daemon-debuginfo |
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
0.011 Low
EPSS
Percentile
84.4%