The remote Debian 10 / 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5171 advisory.
Squid through 4.14 and 5.x through 5.0.5, in some configurations, allows information disclosure because of an out-of-bounds read in WCCP protocol data. This can be leveraged as part of a chain for remote code execution as nobody. (CVE-2021-28116)
In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a Denial of Service can occur when processing long Gopher server responses. (CVE-2021-46784)
Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dsa-5171. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('compat.inc');
if (description)
{
script_id(162562);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/03/21");
script_cve_id("CVE-2021-28116", "CVE-2021-46784");
script_name(english:"Debian DSA-5171-1 : squid - security update");
script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
script_set_attribute(attribute:"description", value:
"The remote Debian 10 / 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dsa-5171 advisory.
- Squid through 4.14 and 5.x through 5.0.5, in some configurations, allows information disclosure because of
an out-of-bounds read in WCCP protocol data. This can be leveraged as part of a chain for remote code
execution as nobody. (CVE-2021-28116)
- In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a
Denial of Service can occur when processing long Gopher server responses. (CVE-2021-46784)
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://security-tracker.debian.org/tracker/source-package/squid");
script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2022/dsa-5171");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-28116");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-46784");
script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/squid");
script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/squid");
script_set_attribute(attribute:"solution", value:
"Upgrade the squid packages.
For the stable distribution (bullseye), these problems have been fixed in version 4.13-10+deb11u1.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N");
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:L/I:N/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-28116");
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:"2021/03/09");
script_set_attribute(attribute:"patch_publication_date", value:"2022/06/27");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/06/28");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:squid");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:squid-cgi");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:squid-common");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:squid-openssl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:squid-purge");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:squid3");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:squidclient");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Debian 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/Debian/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);
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);
var release = get_kb_item('Host/Debian/release');
if ( isnull(release) ) audit(AUDIT_OS_NOT, 'Debian');
var release = chomp(release);
if (! preg(pattern:"^(10)\.[0-9]+|^(11)\.[0-9]+", string:release)) audit(AUDIT_OS_NOT, 'Debian 10.0 / 11.0', 'Debian ' + release);
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, 'Debian', cpu);
var pkgs = [
{'release': '10.0', 'prefix': 'squid', 'reference': '4.6-1+deb10u7'},
{'release': '10.0', 'prefix': 'squid-cgi', 'reference': '4.6-1+deb10u7'},
{'release': '10.0', 'prefix': 'squid-common', 'reference': '4.6-1+deb10u7'},
{'release': '10.0', 'prefix': 'squid-openssl', 'reference': '4.6-1+deb10u7'},
{'release': '10.0', 'prefix': 'squid-purge', 'reference': '4.6-1+deb10u7'},
{'release': '10.0', 'prefix': 'squid3', 'reference': '4.6-1+deb10u7'},
{'release': '10.0', 'prefix': 'squidclient', 'reference': '4.6-1+deb10u7'},
{'release': '11.0', 'prefix': 'squid', 'reference': '4.13-10+deb11u1'},
{'release': '11.0', 'prefix': 'squid-cgi', 'reference': '4.13-10+deb11u1'},
{'release': '11.0', 'prefix': 'squid-common', 'reference': '4.13-10+deb11u1'},
{'release': '11.0', 'prefix': 'squid-openssl', 'reference': '4.13-10+deb11u1'},
{'release': '11.0', 'prefix': 'squid-purge', 'reference': '4.13-10+deb11u1'},
{'release': '11.0', 'prefix': 'squid3', 'reference': '4.13-10+deb11u1'},
{'release': '11.0', 'prefix': 'squidclient', 'reference': '4.13-10+deb11u1'}
];
var flag = 0;
foreach package_array ( pkgs ) {
var release = NULL;
var prefix = NULL;
var reference = NULL;
if (!empty_or_null(package_array['release'])) release = package_array['release'];
if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (release && prefix && reference) {
if (deb_check(release:release, prefix:prefix, reference:reference)) flag++;
}
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : deb_report_get()
);
exit(0);
}
else
{
var tested = deb_pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'squid / squid-cgi / squid-common / squid-openssl / squid-purge / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
debian | debian_linux | squid | p-cpe:/a:debian:debian_linux:squid |
debian | debian_linux | squid-cgi | p-cpe:/a:debian:debian_linux:squid-cgi |
debian | debian_linux | squid-common | p-cpe:/a:debian:debian_linux:squid-common |
debian | debian_linux | squid-openssl | p-cpe:/a:debian:debian_linux:squid-openssl |
debian | debian_linux | squid-purge | p-cpe:/a:debian:debian_linux:squid-purge |
debian | debian_linux | squid3 | p-cpe:/a:debian:debian_linux:squid3 |
debian | debian_linux | squidclient | p-cpe:/a:debian:debian_linux:squidclient |
debian | debian_linux | 10.0 | cpe:/o:debian:debian_linux:10.0 |
debian | debian_linux | 11.0 | cpe:/o:debian:debian_linux:11.0 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28116
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-46784
packages.debian.org/source/bullseye/squid
packages.debian.org/source/buster/squid
security-tracker.debian.org/tracker/CVE-2021-28116
security-tracker.debian.org/tracker/CVE-2021-46784
security-tracker.debian.org/tracker/source-package/squid
www.debian.org/security/2022/dsa-5171