Lucene search

K
nessusUbuntu Security Notice (C) 2023 Canonical, Inc. / NASL script (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.UBUNTU_USN-6436-1.NASL
HistoryOct 18, 2023 - 12:00 a.m.

Ubuntu 20.04 ESM / 22.04 LTS / 23.04 : FRR vulnerabilities (USN-6436-1)

2023-10-1800:00:00
Ubuntu Security Notice (C) 2023 Canonical, Inc. / NASL script (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
8
ubuntu
frrouting
vulnerabilities
usn-6436-1
bgpd
cve-2023-41358
cve-2023-41360
cve-2023-41909
null pointer dereference
security advisory
nessus untested

CVSS3

9.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

EPSS

0.001

Percentile

31.8%

The remote Ubuntu 20.04 ESM / 22.04 LTS / 23.04 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6436-1 advisory.

  • An issue was discovered in FRRouting FRR through 9.0. bgpd/bgp_packet.c processes NLRIs if the attribute length is zero. (CVE-2023-41358)

  • An issue was discovered in FRRouting FRR through 9.0. bgpd/bgp_packet.c can read the initial byte of the ORF header in an ahead-of-stream situation. (CVE-2023-41360)

  • An issue was discovered in FRRouting FRR through 9.0. bgp_nlri_parse_flowspec in bgpd/bgp_flowspec.c processes malformed requests with no attributes, leading to a NULL pointer dereference. (CVE-2023-41909)

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 Ubuntu Security Notice USN-6436-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
{
  script_id(183307);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/18");

  script_cve_id("CVE-2023-41358", "CVE-2023-41360", "CVE-2023-41909");
  script_xref(name:"USN", value:"6436-1");

  script_name(english:"Ubuntu 20.04 ESM / 22.04 LTS / 23.04 : FRR vulnerabilities (USN-6436-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 20.04 ESM / 22.04 LTS / 23.04 host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-6436-1 advisory.

  - An issue was discovered in FRRouting FRR through 9.0. bgpd/bgp_packet.c processes NLRIs if the attribute
    length is zero. (CVE-2023-41358)

  - An issue was discovered in FRRouting FRR through 9.0. bgpd/bgp_packet.c can read the initial byte of the
    ORF header in an ahead-of-stream situation. (CVE-2023-41360)

  - An issue was discovered in FRRouting FRR through 9.0. bgp_nlri_parse_flowspec in bgpd/bgp_flowspec.c
    processes malformed requests with no attributes, leading to a NULL pointer dereference. (CVE-2023-41909)

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://ubuntu.com/security/notices/USN-6436-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:N/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:N/S:U/C:H/I:N/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-2023-41360");

  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:"2023/08/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/10/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/10/18");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:23.04");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:frr");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:frr-pythontools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:frr-rpki-rtrlib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:frr-snmp");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2023 Canonical, Inc. / NASL script (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}

include('debian_package.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('20.04' >< os_release || '22.04' >< os_release || '23.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 22.04 / 23.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) 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) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '20.04', 'pkgname': 'frr', 'pkgver': '7.2.1-1ubuntu0.2+esm1'},
    {'osver': '20.04', 'pkgname': 'frr-pythontools', 'pkgver': '7.2.1-1ubuntu0.2+esm1'},
    {'osver': '20.04', 'pkgname': 'frr-rpki-rtrlib', 'pkgver': '7.2.1-1ubuntu0.2+esm1'},
    {'osver': '20.04', 'pkgname': 'frr-snmp', 'pkgver': '7.2.1-1ubuntu0.2+esm1'},
    {'osver': '22.04', 'pkgname': 'frr', 'pkgver': '8.1-1ubuntu1.6'},
    {'osver': '22.04', 'pkgname': 'frr-pythontools', 'pkgver': '8.1-1ubuntu1.6'},
    {'osver': '22.04', 'pkgname': 'frr-rpki-rtrlib', 'pkgver': '8.1-1ubuntu1.6'},
    {'osver': '22.04', 'pkgname': 'frr-snmp', 'pkgver': '8.1-1ubuntu1.6'},
    {'osver': '23.04', 'pkgname': 'frr', 'pkgver': '8.4.2-1ubuntu1.4'},
    {'osver': '23.04', 'pkgname': 'frr-pythontools', 'pkgver': '8.4.2-1ubuntu1.4'},
    {'osver': '23.04', 'pkgname': 'frr-rpki-rtrlib', 'pkgver': '8.4.2-1ubuntu1.4'},
    {'osver': '23.04', 'pkgname': 'frr-snmp', 'pkgver': '8.4.2-1ubuntu1.4'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'frr / frr-pythontools / frr-rpki-rtrlib / frr-snmp');
}
VendorProductVersionCPE
canonicalubuntu_linux20.04cpe:/o:canonical:ubuntu_linux:20.04:-:esm
canonicalubuntu_linux22.04cpe:/o:canonical:ubuntu_linux:22.04:-:lts
canonicalubuntu_linux23.04cpe:/o:canonical:ubuntu_linux:23.04
canonicalubuntu_linuxfrrp-cpe:/a:canonical:ubuntu_linux:frr
canonicalubuntu_linuxfrr-pythontoolsp-cpe:/a:canonical:ubuntu_linux:frr-pythontools
canonicalubuntu_linuxfrr-rpki-rtrlibp-cpe:/a:canonical:ubuntu_linux:frr-rpki-rtrlib
canonicalubuntu_linuxfrr-snmpp-cpe:/a:canonical:ubuntu_linux:frr-snmp

CVSS3

9.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

EPSS

0.001

Percentile

31.8%