RHEL 5 : nasm (Unpatched Vulnerability)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory nasm. The text
# itself is copyright (C) Red Hat, Inc.
##

include('compat.inc');

if (description)
{
  script_id(195778);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/05/11");

  script_cve_id(
    "CVE-2017-11111",
    "CVE-2017-14228",
    "CVE-2017-17810",
    "CVE-2017-17811",
    "CVE-2017-17812",
    "CVE-2017-17813",
    "CVE-2017-17814",
    "CVE-2017-17815",
    "CVE-2017-17816",
    "CVE-2017-17817",
    "CVE-2017-17818",
    "CVE-2017-17819",
    "CVE-2017-17820",
    "CVE-2018-8883",
    "CVE-2018-10016",
    "CVE-2018-10254",
    "CVE-2018-10316",
    "CVE-2018-16382",
    "CVE-2018-19213",
    "CVE-2018-19214",
    "CVE-2018-19215",
    "CVE-2018-19755",
    "CVE-2019-6290",
    "CVE-2019-6291",
    "CVE-2019-20334",
    "CVE-2019-20352",
    "CVE-2020-24241",
    "CVE-2020-24242",
    "CVE-2020-24978"
  );

  script_name(english:"RHEL 5 : nasm (Unpatched Vulnerability)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat 5 host is affected by multiple vulnerabilities that will not be patched.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 5 host has one or more packages installed that are affected by multiple
vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - nasm: double-free vulnerability in pp_tokline asm/preproc.c (CVE-2020-24978)

  - In Netwide Assembler (NASM) 2.14rc0, preproc.c allows remote attackers to cause a denial of service (heap-
    based buffer overflow and application crash) or possibly have unspecified other impact via a crafted file.
    (CVE-2017-11111)

  - In Netwide Assembler (NASM) 2.14rc0, there is an illegal address access in the function paste_tokens() in
    preproc.c, aka a NULL pointer dereference. It will lead to remote denial of service. (CVE-2017-14228)

  - In Netwide Assembler (NASM) 2.14rc0, there is a SEGV on unknown address that will cause a remote denial
    of service attack, because asm/preproc.c mishandles macro calls that have the wrong number of arguments.
    (CVE-2017-17810)

  - In Netwide Assembler (NASM) 2.14rc0, there is a heap-based buffer overflow that will cause a remote denial
    of service attack, related to a strcpy in paste_tokens in asm/preproc.c, a similar issue to
    CVE-2017-11111. (CVE-2017-17811)

  - In Netwide Assembler (NASM) 2.14rc0, there is a heap-based buffer over-read in the function detoken() in
    asm/preproc.c that will cause a remote denial of service attack. (CVE-2017-17812)

  - In Netwide Assembler (NASM) 2.14rc0, there is a use-after-free in the pp_list_one_macro function in
    asm/preproc.c that will cause a remote denial of service attack, related to mishandling of line-syntax
    errors. (CVE-2017-17813)

  - In Netwide Assembler (NASM) 2.14rc0, there is a use-after-free in do_directive in asm/preproc.c that will
    cause a remote denial of service attack. (CVE-2017-17814)

  - In Netwide Assembler (NASM) 2.14rc0, there is an illegal address access in is_mmacro() in asm/preproc.c
    that will cause a remote denial of service attack, because of a missing check for the relationship between
    minimum and maximum parameter counts. (CVE-2017-17815)

  - In Netwide Assembler (NASM) 2.14rc0, there is a use-after-free in pp_getline in asm/preproc.c that will
    cause a remote denial of service attack. (CVE-2017-17816)

  - In Netwide Assembler (NASM) 2.14rc0, there is a use-after-free in pp_verror in asm/preproc.c that will
    cause a remote denial of service attack. (CVE-2017-17817)

  - In Netwide Assembler (NASM) 2.14rc0, there is a heap-based buffer over-read that will cause a remote
    denial of service attack, related to a while loop in paste_tokens in asm/preproc.c. (CVE-2017-17818)

  - In Netwide Assembler (NASM) 2.14rc0, there is an illegal address access in the function find_cc() in
    asm/preproc.c that will cause a remote denial of service attack, because pointers associated with
    skip_white_ calls are not validated. (CVE-2017-17819)

  - In Netwide Assembler (NASM) 2.14rc0, there is a use-after-free in pp_list_one_macro in asm/preproc.c that
    will lead to a remote denial of service attack, related to mishandling of operand-type errors.
    (CVE-2017-17820)

  - Netwide Assembler (NASM) 2.14rc0 has a division-by-zero vulnerability in the expr5 function in asm/eval.c
    via a malformed input file. (CVE-2018-10016)

  - Netwide Assembler (NASM) 2.13 has a stack-based buffer over-read in the disasm function of the
    disasm/disasm.c file. Remote attackers could leverage this vulnerability to cause a denial of service or
    possibly have unspecified other impact via a crafted ELF file. (CVE-2018-10254)

  - Netwide Assembler (NASM) 2.14rc0 has an endless while loop in the assemble_file function of asm/nasm.c
    because of a globallineno integer overflow. (CVE-2018-10316)

  - Netwide Assembler (NASM) 2.14rc15 has a buffer over-read in x86/regflags.c. (CVE-2018-16382)

  - Netwide Assembler (NASM) through 2.14rc16 has memory leaks that may lead to DoS, related to nasm_malloc in
    nasmlib/malloc.c. (CVE-2018-19213)

  - Netwide Assembler (NASM) 2.14rc15 has a heap-based buffer over-read in expand_mmac_params in asm/preproc.c
    for insufficient input. (CVE-2018-19214)

  - Netwide Assembler (NASM) 2.14rc16 has a heap-based buffer over-read in expand_mmac_params in asm/preproc.c
    for the special cases of the % and $ and ! characters. (CVE-2018-19215)

  - There is an illegal address access at asm/preproc.c (function: is_mmacro) in Netwide Assembler (NASM)
    2.14rc16 that will cause a denial of service (out-of-bounds array access) because a certain conversion can
    result in a negative integer. (CVE-2018-19755)

  - Netwide Assembler (NASM) 2.13.02rc2 has a buffer over-read in the parse_line function in asm/parser.c via
    uncontrolled access to nasm_reg_flags. (CVE-2018-8883)

  - In Netwide Assembler (NASM) 2.14.02, stack consumption occurs in expr# functions in asm/eval.c. This
    potentially affects the relationships among expr0, expr1, expr2, expr3, expr4, expr5, and expr6 (and
    stdscan in asm/stdscan.c). This is similar to CVE-2019-6290 and CVE-2019-6291. (CVE-2019-20334)

  - In Netwide Assembler (NASM) 2.15rc0, a heap-based buffer over-read occurs (via a crafted .asm file) in
    set_text_free when called from expand_one_smacro in asm/preproc.c. (CVE-2019-20352)

  - An infinite recursion issue was discovered in eval.c in Netwide Assembler (NASM) through 2.14.02. There is
    a stack exhaustion problem resulting from infinite recursion in the functions expr, rexp, bexpr and cexpr
    in certain scenarios involving lots of '{' characters. Remote attackers could leverage this vulnerability
    to cause a denial-of-service via a crafted asm file. (CVE-2019-6290)

  - An issue was discovered in the function expr6 in eval.c in Netwide Assembler (NASM) through 2.14.02. There
    is a stack exhaustion problem caused by the expr6 function making recursive calls to itself in certain
    scenarios involving lots of '!' or '+' or '-' characters. Remote attackers could leverage this
    vulnerability to cause a denial-of-service via a crafted asm file. (CVE-2019-6291)

  - In Netwide Assembler (NASM) 2.15rc10, there is heap use-after-free in saa_wbytes in nasmlib/saa.c.
    (CVE-2020-24241)

  - In Netwide Assembler (NASM) 2.15rc10, SEGV can be triggered in tok_text in asm/preproc.c by accessing READ
    memory. (CVE-2020-24242)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package
is installed.");
  script_set_attribute(attribute:"solution", value:
"The vendor has acknowledged the vulnerabilities but no solution has been provided. Refer to the vendor for remediation
guidance.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  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:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-24978");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/07/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/05/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:5");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:nasm");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Red Hat Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('rpm.inc');
include('rhel.inc');

if (!get_kb_item("global_settings/vendor_unpatched"))
exit(0, "Unpatched Vulnerabilities Detection not active.");

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RedHat/release');
if (isnull(os_release) || 'Red Hat' >!< os_release) audit(AUDIT_OS_NOT, 'Red Hat');
var os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
os_ver = os_ver[1];
if (!rhel_check_release(operator: 'ge', os_version: os_ver, rhel_version: '5')) audit(AUDIT_OS_NOT, 'Red Hat 5.x', 'Red Hat ' + os_ver);

if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);

var constraints = [
  {
    'pkgs': [
      {'reference':'nasm', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'unpatched_pkg':'nasm'}
    ]
  }
];


var flag = 0;
foreach var constraint_array ( constraints ) {
  var repo_relative_urls = NULL;
  var enterprise_linux_flag = rhel_repo_urls_has_content_dist_rhel(repo_urls:repo_relative_urls);
  foreach var pkg ( constraint_array['pkgs'] ) {
    var unpatched_pkg = NULL;
    var _release = NULL;
    var sp = NULL;
    var el_string = NULL;
    var rpm_spec_vers_cmp = NULL;
    var exists_check = NULL;
    var cves = NULL;
    if (!empty_or_null(pkg['unpatched_pkg'])) unpatched_pkg = pkg['unpatched_pkg'];
    if (!empty_or_null(pkg['release'])) _release = 'RHEL' + pkg['release'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (unpatched_pkg &&
        _release &&
        (!exists_check || rpm_exists(release:_release, rpm:exists_check)) &&
        unpatched_package_exists(release:_release, package:unpatched_pkg, cves: cves)) flag++;
  }
}

if (flag)
{
  var extra = NULL;
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : unpatched_packages_report()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'nasm');
}