Debian DLA-2636-1 : pjproject security update

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-2636-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(149003);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/12");

  script_cve_id("CVE-2021-21375");

  script_name(english:"Debian DLA-2636-1 : pjproject security update");
  script_summary(english:"Checks dpkg output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description",
    value:
"An issue has been found in pjproject, a set of libraries for the PJ
Project. Due to bad handling of two consecutive crafted answers to an
INVITE, the attacker is able to crash the server resulting in a denial
of service.

For Debian 9 stretch, this problem has been fixed in version
2.5.5~dfsg-6+deb9u2.

We recommend that you upgrade your pjproject packages.

For the detailed security status of pjproject please refer to its
security tracker page at:
https://security-tracker.debian.org/tracker/pjproject

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA security advisory. Tenable has attempted
to automatically clean and format it as much as possible without
introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://lists.debian.org/debian-lts-announce/2021/04/msg00023.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/stretch/pjproject"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/source-package/pjproject"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/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:R/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-2021-21375");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpj2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpjlib-util2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpjmedia-audiodev2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpjmedia-codec2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpjmedia-videodev2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpjmedia2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpjnath2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpjproject-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpjsip-simple2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpjsip-ua2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpjsip2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpjsua2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpjsua2-2v5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-pjproject");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/03/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/04/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/04/27");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"9.0", prefix:"libpj2", reference:"2.5.5~dfsg-6+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"libpjlib-util2", reference:"2.5.5~dfsg-6+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"libpjmedia-audiodev2", reference:"2.5.5~dfsg-6+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"libpjmedia-codec2", reference:"2.5.5~dfsg-6+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"libpjmedia-videodev2", reference:"2.5.5~dfsg-6+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"libpjmedia2", reference:"2.5.5~dfsg-6+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"libpjnath2", reference:"2.5.5~dfsg-6+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"libpjproject-dev", reference:"2.5.5~dfsg-6+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"libpjsip-simple2", reference:"2.5.5~dfsg-6+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"libpjsip-ua2", reference:"2.5.5~dfsg-6+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"libpjsip2", reference:"2.5.5~dfsg-6+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"libpjsua2", reference:"2.5.5~dfsg-6+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"libpjsua2-2v5", reference:"2.5.5~dfsg-6+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"python-pjproject", reference:"2.5.5~dfsg-6+deb9u2")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");