CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
27.7%
The remote SUSE Linux SLED15 / SLES15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2021:3950-1 advisory.
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 70300
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# SUSE update advisory SUSE-SU-2021:3950-1. The text itself
# is copyright (C) SUSE.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(155896);
script_version("1.5");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/13");
script_cve_id("CVE-2021-41617");
script_xref(name:"SuSE", value:"SUSE-SU-2021:3950-1");
script_xref(name:"IAVA", value:"2021-A-0474-S");
script_name(english:"SUSE SLED15 / SLES15 Security Update : openssh (SUSE-SU-2021:3950-1)");
script_set_attribute(attribute:"synopsis", value:
"The remote SUSE host is missing a security update.");
script_set_attribute(attribute:"description", value:
"The remote SUSE Linux SLED15 / SLES15 host has packages installed that are affected by a vulnerability as referenced in
the SUSE-SU-2021:3950-1 advisory.
- sshd in OpenSSH 6.2 through 8.x before 8.8, when certain non-default configurations are used, allows
privilege escalation because supplemental groups are not initialized as expected. Helper programs for
AuthorizedKeysCommand and AuthorizedPrincipalsCommand may run with privileges associated with group
memberships of the sshd process, if the configuration specifies running the command as a different user.
(CVE-2021-41617)
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://bugzilla.suse.com/1190975");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-41617");
# https://lists.suse.com/pipermail/sle-security-updates/2021-December/009857.html
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?282e2402");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:L/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:H/PR:L/UI:N/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-2021-41617");
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:"2021/09/26");
script_set_attribute(attribute:"patch_publication_date", value:"2021/12/06");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/12/07");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-askpass-gnome");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-clients");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-common");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-fips");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-helpers");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-server");
script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:15");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"SuSE Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2021-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list");
exit(0);
}
include('rpm.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item("Host/SuSE/release");
if (isnull(os_release) || os_release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
var os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'SUSE');
os_ver = os_ver[1];
if (! preg(pattern:"^(SLED15|SLES15)$", string:os_ver)) audit(AUDIT_OS_NOT, 'SUSE SLED15 / SLES15', 'SUSE (' + os_ver + ')');
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'SUSE (' + os_ver + ')', cpu);
var service_pack = get_kb_item("Host/SuSE/patchlevel");
if (isnull(service_pack)) service_pack = "0";
if (os_ver == "SLED15" && (! preg(pattern:"^(3)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLED15 SP3", os_ver + " SP" + service_pack);
if (os_ver == "SLES15" && (! preg(pattern:"^(3)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES15 SP3", os_ver + " SP" + service_pack);
var pkgs = [
{'reference':'openssh-8.4p1-3.6.1', 'sp':'3', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE, 'exists_check':['sle-module-basesystem-release-15.3']},
{'reference':'openssh-8.4p1-3.6.1', 'sp':'3', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE, 'exists_check':['sle-module-basesystem-release-15.3']},
{'reference':'openssh-clients-8.4p1-3.6.1', 'sp':'3', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE, 'exists_check':['sle-module-basesystem-release-15.3']},
{'reference':'openssh-clients-8.4p1-3.6.1', 'sp':'3', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE, 'exists_check':['sle-module-basesystem-release-15.3']},
{'reference':'openssh-common-8.4p1-3.6.1', 'sp':'3', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE, 'exists_check':['sle-module-basesystem-release-15.3']},
{'reference':'openssh-common-8.4p1-3.6.1', 'sp':'3', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE, 'exists_check':['sle-module-basesystem-release-15.3']},
{'reference':'openssh-fips-8.4p1-3.6.1', 'sp':'3', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE, 'exists_check':['sle-module-basesystem-release-15.3']},
{'reference':'openssh-fips-8.4p1-3.6.1', 'sp':'3', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE, 'exists_check':['sle-module-basesystem-release-15.3', 'sle-module-server-applications-release-15.3']},
{'reference':'openssh-helpers-8.4p1-3.6.1', 'sp':'3', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE, 'exists_check':['sle-module-basesystem-release-15.3']},
{'reference':'openssh-helpers-8.4p1-3.6.1', 'sp':'3', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE, 'exists_check':['sle-module-basesystem-release-15.3']},
{'reference':'openssh-server-8.4p1-3.6.1', 'sp':'3', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE, 'exists_check':['sle-module-basesystem-release-15.3']},
{'reference':'openssh-server-8.4p1-3.6.1', 'sp':'3', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE, 'exists_check':['sle-module-basesystem-release-15.3']},
{'reference':'openssh-askpass-gnome-8.4p1-3.6.1', 'sp':'3', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE, 'exists_check':['sle-module-desktop-applications-release-15.3']},
{'reference':'openssh-askpass-gnome-8.4p1-3.6.1', 'sp':'3', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE, 'exists_check':['sle-module-desktop-applications-release-15.3']}
];
var ltss_caveat_required = FALSE;
var flag = 0;
foreach var package_array ( pkgs ) {
var reference = NULL;
var _release = NULL;
var sp = NULL;
var _cpu = NULL;
var exists_check = NULL;
var rpm_spec_vers_cmp = NULL;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) _release = 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['exists_check'])) exists_check = package_array['exists_check'];
if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
if (reference && _release) {
if (exists_check) {
var check_flag = 0;
foreach var check (exists_check) {
if (!rpm_exists(release:_release, rpm:check)) continue;
check_flag++;
}
if (!check_flag) continue;
}
if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, rpm_spec_vers_cmp:rpm_spec_vers_cmp)) 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, 'openssh / openssh-askpass-gnome / openssh-clients / openssh-common / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
novell | suse_linux | openssh | p-cpe:/a:novell:suse_linux:openssh |
novell | suse_linux | openssh-askpass-gnome | p-cpe:/a:novell:suse_linux:openssh-askpass-gnome |
novell | suse_linux | openssh-clients | p-cpe:/a:novell:suse_linux:openssh-clients |
novell | suse_linux | openssh-common | p-cpe:/a:novell:suse_linux:openssh-common |
novell | suse_linux | openssh-fips | p-cpe:/a:novell:suse_linux:openssh-fips |
novell | suse_linux | openssh-helpers | p-cpe:/a:novell:suse_linux:openssh-helpers |
novell | suse_linux | openssh-server | p-cpe:/a:novell:suse_linux:openssh-server |
novell | suse_linux | 15 | cpe:/o:novell:suse_linux:15 |
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
27.7%