EulerOS Virtualization 3.0.6.6 : yajl (EulerOS-SA-2022-2542)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(165874);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/10");

  script_cve_id("CVE-2022-24795");

  script_name(english:"EulerOS Virtualization 3.0.6.6 : yajl (EulerOS-SA-2022-2542)");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS Virtualization host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"According to the versions of the yajl package installed, the EulerOS Virtualization installation on the remote host is
affected by the following vulnerabilities :

  - yajl-ruby is a C binding to the YAJL JSON parsing and generation library. The 1.x branch and the 2.x
    branch of `yajl` contain an integer overflow which leads to subsequent heap memory corruption when dealing
    with large (~2GB) inputs. The reallocation logic at `yajl_buf.c#L64` may result in the `need` 32bit
    integer wrapping to 0 when `need` approaches a value of 0x80000000 (i.e. ~2GB of data), which results in a
    reallocation of buf->alloc into a small heap chunk. These integers are declared as `size_t` in the 2.x
    branch of `yajl`, which practically prevents the issue from triggering on 64bit platforms, however this
    does not preclude this issue triggering on 32bit builds on which `size_t` is a 32bit integer. Subsequent
    population of this under-allocated heap chunk is based on the original buffer size, leading to heap memory
    corruption. This vulnerability mostly impacts process availability. Maintainers believe exploitation for
    arbitrary code execution is unlikely. A patch is available and anticipated to be part of yajl-ruby version
    1.4.2. As a workaround, avoid passing large inputs to YAJL. (CVE-2022-24795)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security
advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional
issues.");
  # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2022-2542
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cfd2b724");
  script_set_attribute(attribute:"solution", value:
"Update the affected yajl packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
  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:N/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-2022-24795");

  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:"2022/04/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/10/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/10/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:yajl");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:uvp:3.0.6.6");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}

include("rpm.inc");

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

var release = get_kb_item("Host/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
var uvp = get_kb_item("Host/EulerOS/uvp_version");
if (uvp != "3.0.6.6") audit(AUDIT_OS_NOT, "EulerOS Virtualization 3.0.6.6");
if (!get_kb_item("Host/EulerOS/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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

var flag = 0;

var pkgs = [
  "yajl-2.0.4-4.h2.eulerosv2r7"
];

foreach (var pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    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, "yajl");
}