CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
99.5%
This update for sudo fixes the following issues :
A Heap-based buffer overflow in sudo could be exploited to allow a user to gain root privileges [bsc#1181090,CVE-2021-3156]
It was possible for a user to test for the existence of a directory due to a Race Condition in sudoedit
[bsc#1180684,CVE-2021-23239]
A Possible Symlink Attack vector existed in sudoedit
if SELinux was running in permissive mode [bsc#1180685, CVE-2021-23240]
It was possible for a User to enable Debug Settings not Intended for them [bsc#1180687]
Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2021:0226-1.
# The text itself is copyright (C) SUSE.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(145484);
script_version("1.11");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/01/18");
script_cve_id("CVE-2021-3156", "CVE-2021-23239", "CVE-2021-23240");
script_xref(name:"IAVA", value:"2021-A-0053");
script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2022/04/27");
script_name(english:"SUSE SLES12 Security Update : sudo (SUSE-SU-2021:0226-1)");
script_set_attribute(attribute:"synopsis", value:
"The remote SUSE host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"This update for sudo fixes the following issues :
A Heap-based buffer overflow in sudo could be exploited to allow a
user to gain root privileges [bsc#1181090,CVE-2021-3156]
It was possible for a user to test for the existence of a directory
due to a Race Condition in `sudoedit` [bsc#1180684,CVE-2021-23239]
A Possible Symlink Attack vector existed in `sudoedit` if SELinux was
running in permissive mode [bsc#1180685, CVE-2021-23240]
It was possible for a User to enable Debug Settings not Intended for
them [bsc#1180687]
Note that Tenable Network Security has extracted the preceding
description block directly from the SUSE security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1180684");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1180685");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1180687");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1181090");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-23239/");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-23240/");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3156/");
# https://www.suse.com/support/update/announcement/2021/suse-su-20210226-1
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8d3e4327");
script_set_attribute(attribute:"solution", value:
"To install this SUSE Security Update use the SUSE recommended
installation methods like YaST online_update or 'zypper patch'.
Alternatively you can run the command listed for your product :
SUSE OpenStack Cloud Crowbar 9 :
zypper in -t patch SUSE-OpenStack-Cloud-Crowbar-9-2021-226=1
SUSE OpenStack Cloud Crowbar 8 :
zypper in -t patch SUSE-OpenStack-Cloud-Crowbar-8-2021-226=1
SUSE OpenStack Cloud 9 :
zypper in -t patch SUSE-OpenStack-Cloud-9-2021-226=1
SUSE OpenStack Cloud 8 :
zypper in -t patch SUSE-OpenStack-Cloud-8-2021-226=1
SUSE Linux Enterprise Server for SAP 12-SP4 :
zypper in -t patch SUSE-SLE-SAP-12-SP4-2021-226=1
SUSE Linux Enterprise Server for SAP 12-SP3 :
zypper in -t patch SUSE-SLE-SAP-12-SP3-2021-226=1
SUSE Linux Enterprise Server 12-SP4-LTSS :
zypper in -t patch SUSE-SLE-SERVER-12-SP4-LTSS-2021-226=1
SUSE Linux Enterprise Server 12-SP3-LTSS :
zypper in -t patch SUSE-SLE-SERVER-12-SP3-2021-226=1
SUSE Linux Enterprise Server 12-SP3-BCL :
zypper in -t patch SUSE-SLE-SERVER-12-SP3-BCL-2021-226=1
SUSE Enterprise Storage 5 :
zypper in -t patch SUSE-Storage-5-2021-226=1
HPE Helion Openstack 8 :
zypper in -t patch HPE-Helion-OpenStack-8-2021-226=1");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-3156");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"exploit_framework_core", value:"true");
script_set_attribute(attribute:"exploited_by_malware", value:"true");
script_set_attribute(attribute:"metasploit_name", value:'Sudo Heap-Based Buffer Overflow');
script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
script_set_attribute(attribute:"canvas_package", value:"CANVAS");
script_set_attribute(attribute:"vuln_publication_date", value:"2021/01/12");
script_set_attribute(attribute:"patch_publication_date", value:"2021/01/26");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/01/27");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:sudo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:sudo-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:sudo-debugsource");
script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");
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("audit.inc");
include("global_settings.inc");
include("rpm.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/SuSE/release");
if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
os_ver = os_ver[1];
if (! preg(pattern:"^(SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLES12", "SUSE " + os_ver);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu);
sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES12" && (! preg(pattern:"^(3|4)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP3/4", os_ver + " SP" + sp);
flag = 0;
if (rpm_check(release:"SLES12", sp:"4", reference:"sudo-1.8.20p2-3.20.1")) flag++;
if (rpm_check(release:"SLES12", sp:"4", reference:"sudo-debuginfo-1.8.20p2-3.20.1")) flag++;
if (rpm_check(release:"SLES12", sp:"4", reference:"sudo-debugsource-1.8.20p2-3.20.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"sudo-1.8.20p2-3.20.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"sudo-debuginfo-1.8.20p2-3.20.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"sudo-debugsource-1.8.20p2-3.20.1")) flag++;
if (flag)
{
if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
else security_hole(0);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "sudo");
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23239
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23240
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3156
www.nessus.org/u?8d3e4327
bugzilla.suse.com/show_bug.cgi?id=1180684
bugzilla.suse.com/show_bug.cgi?id=1180685
bugzilla.suse.com/show_bug.cgi?id=1180687
bugzilla.suse.com/show_bug.cgi?id=1181090
www.suse.com/security/cve/CVE-2021-23239/
www.suse.com/security/cve/CVE-2021-23240/
www.suse.com/security/cve/CVE-2021-3156/
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
99.5%