6.8 Medium
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
7.8 High
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
7.7 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
38.0%
The remote CentOS Linux 9 host has packages installed that are affected by a vulnerability as referenced in the perl- Encode-3.08-462.el9 build changelog.
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# the CentOS Stream Build Service.
##
include('compat.inc');
if (description)
{
script_id(191217);
script_version("1.1");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/26");
script_cve_id("CVE-2021-36770");
script_name(english:"CentOS 9 : perl-Encode-3.08-462.el9");
script_set_attribute(attribute:"synopsis", value:
"The remote CentOS host is missing a security update for perl-Encode.");
script_set_attribute(attribute:"description", value:
"The remote CentOS Linux 9 host has packages installed that are affected by a vulnerability as referenced in the perl-
Encode-3.08-462.el9 build changelog.
- Encode.pm, as distributed in Perl through 5.34.0, allows local users to gain privileges via a Trojan horse
Encode::ConfigLocal library (in the current working directory) that preempts dynamic module loading.
Exploitation requires an unusual configuration, and certain 2021 versions of Encode.pm (3.05 through
3.11). This issue occurs because the || operator evaluates @INC in a scalar context, and thus @INC has
only an integer value. (CVE-2021-36770)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://kojihub.stream.centos.org/koji/buildinfo?buildID=13318");
script_set_attribute(attribute:"solution", value:
"Update the CentOS 9 Stream perl-Encode package.");
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-2021-36770");
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:"2021/08/11");
script_set_attribute(attribute:"patch_publication_date", value:"2021/08/10");
script_set_attribute(attribute:"plugin_publication_date", value:"2024/02/29");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:centos:centos:9");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:perl-Encode");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:perl-Encode-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:perl-encoding");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"CentOS Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/CentOS/release", "Host/CentOS/rpm-list", "Host/cpu");
exit(0);
}
include('rpm.inc');
include('rhel.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/CentOS/release');
if (isnull(os_release) || 'CentOS' >!< os_release) audit(AUDIT_OS_NOT, 'CentOS');
var os_ver = pregmatch(pattern: "CentOS(?: Stream)?(?: Linux)? release ([0-9]+)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'CentOS');
os_ver = os_ver[1];
if (!rhel_check_release(operator: 'ge', os_version: os_ver, rhel_version: '9')) audit(AUDIT_OS_NOT, 'CentOS 9.x', 'CentOS ' + os_ver);
if (!get_kb_item('Host/CentOS/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$" && 's390' >!< cpu && 'aarch64' >!< cpu && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'CentOS', cpu);
var pkgs = [
{'reference':'perl-Encode-3.08-462.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'4'},
{'reference':'perl-Encode-devel-3.08-462.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'4'},
{'reference':'perl-encoding-3.00-462.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'4'}
];
var flag = 0;
foreach var package_array ( pkgs ) {
var reference = NULL;
var _release = NULL;
var sp = NULL;
var _cpu = NULL;
var el_string = NULL;
var rpm_spec_vers_cmp = NULL;
var epoch = NULL;
var allowmaj = NULL;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) _release = 'CentOS-' + package_array['release'];
if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
if (reference && _release) {
if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) 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, 'perl-Encode / perl-Encode-devel / perl-encoding');
}
Vendor | Product | Version | CPE |
---|---|---|---|
centos | centos | 9 | cpe:/a:centos:centos:9 |
centos | centos | perl-encode | p-cpe:/a:centos:centos:perl-encode |
centos | centos | perl-encode-devel | p-cpe:/a:centos:centos:perl-encode-devel |
centos | centos | perl-encoding | p-cpe:/a:centos:centos:perl-encoding |
6.8 Medium
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
7.8 High
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
7.7 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
38.0%