CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
30.4%
The remote Ubuntu 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4957-1 advisory.
It was discovered that DjVuLibre incorrectly handled certain memory operations. If a user or automated system were tricked into processing a specially crafted DjVu file, a remote attacker could cause applications to hang or crash, resulting in a denial of service, or possibly execute arbitrary code.
Tenable has extracted the preceding description block directly from the Ubuntu security advisory.
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 70300
##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4957-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(149527);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/28");
script_cve_id(
"CVE-2021-3500",
"CVE-2021-32490",
"CVE-2021-32491",
"CVE-2021-32492",
"CVE-2021-32493"
);
script_xref(name:"USN", value:"4957-1");
script_name(english:"Ubuntu 18.04 LTS / 20.04 LTS : DjVuLibre vulnerabilities (USN-4957-1)");
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 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as
referenced in the USN-4957-1 advisory.
It was discovered that DjVuLibre incorrectly handled certain memory operations. If a user or automated
system were tricked into processing a specially crafted DjVu file, a remote attacker could cause
applications to hang or crash, resulting in a denial of service, or possibly execute arbitrary code.
Tenable has extracted the preceding description block directly from the Ubuntu security advisory.
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-4957-1");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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-2021-3500");
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:"2021/05/17");
script_set_attribute(attribute:"patch_publication_date", value:"2021/05/17");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/05/17");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:djview");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:djview3");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:djvulibre-bin");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:djvulibre-desktop");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:djvuserve");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libdjvulibre-dev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libdjvulibre-text");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libdjvulibre21");
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) 2021-2024 Canonical, Inc. / NASL script (C) 2021-2024 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 (! ('18.04' >< os_release || '20.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 18.04 / 20.04', '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': '18.04', 'pkgname': 'djview', 'pkgver': '3.5.27.1-8ubuntu0.3'},
{'osver': '18.04', 'pkgname': 'djview3', 'pkgver': '3.5.27.1-8ubuntu0.3'},
{'osver': '18.04', 'pkgname': 'djvulibre-bin', 'pkgver': '3.5.27.1-8ubuntu0.3'},
{'osver': '18.04', 'pkgname': 'djvulibre-desktop', 'pkgver': '3.5.27.1-8ubuntu0.3'},
{'osver': '18.04', 'pkgname': 'djvuserve', 'pkgver': '3.5.27.1-8ubuntu0.3'},
{'osver': '18.04', 'pkgname': 'libdjvulibre-dev', 'pkgver': '3.5.27.1-8ubuntu0.3'},
{'osver': '18.04', 'pkgname': 'libdjvulibre-text', 'pkgver': '3.5.27.1-8ubuntu0.3'},
{'osver': '18.04', 'pkgname': 'libdjvulibre21', 'pkgver': '3.5.27.1-8ubuntu0.3'},
{'osver': '20.04', 'pkgname': 'djview', 'pkgver': '3.5.27.1-14ubuntu0.1'},
{'osver': '20.04', 'pkgname': 'djview3', 'pkgver': '3.5.27.1-14ubuntu0.1'},
{'osver': '20.04', 'pkgname': 'djvulibre-bin', 'pkgver': '3.5.27.1-14ubuntu0.1'},
{'osver': '20.04', 'pkgname': 'djvulibre-desktop', 'pkgver': '3.5.27.1-14ubuntu0.1'},
{'osver': '20.04', 'pkgname': 'djvuserve', 'pkgver': '3.5.27.1-14ubuntu0.1'},
{'osver': '20.04', 'pkgname': 'libdjvulibre-dev', 'pkgver': '3.5.27.1-14ubuntu0.1'},
{'osver': '20.04', 'pkgname': 'libdjvulibre-text', 'pkgver': '3.5.27.1-14ubuntu0.1'},
{'osver': '20.04', 'pkgname': 'libdjvulibre21', 'pkgver': '3.5.27.1-14ubuntu0.1'}
];
var flag = 0;
foreach var 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)
{
var extra = '';
extra += ubuntu_report_get();
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : extra
);
exit(0);
}
else
{
var tested = ubuntu_pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'djview / djview3 / djvulibre-bin / djvulibre-desktop / djvuserve / etc');
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-32490
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-32491
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-32492
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-32493
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3500
ubuntu.com/security/notices/USN-4957-1
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
30.4%