3.3 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:L/AC:M/Au:N/C:P/I:P/A:N
6.3 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
6.2 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
5.1%
Fabian Vogt discovered a flaw in sddm, a modern display manager for X11. A local attacker can take advantage of a race condition when creating the Xauthority file to escalate privileges.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DSA-4783. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('compat.inc');
if (description)
{
script_id(142513);
script_version("1.5");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/09");
script_cve_id("CVE-2020-28049");
script_xref(name:"DSA", value:"4783");
script_name(english:"Debian DSA-4783-1 : sddm - security update");
script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security-related update.");
script_set_attribute(attribute:"description", value:
"Fabian Vogt discovered a flaw in sddm, a modern display manager for
X11. A local attacker can take advantage of a race condition when
creating the Xauthority file to escalate privileges.");
script_set_attribute(attribute:"see_also", value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=973748");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/sddm");
script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/sddm");
script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2020/dsa-4783");
script_set_attribute(attribute:"solution", value:
"Upgrade the sddm packages.
For the stable distribution (buster), this problem has been fixed in
version 0.18.0-1+deb10u1.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:P/I:P/A:N");
script_set_cvss_temporal_vector("CVSS2#E:POC/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:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-28049");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2020/11/04");
script_set_attribute(attribute:"patch_publication_date", value:"2020/11/05");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/11/06");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:sddm");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Debian Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");
exit(0);
}
include("audit.inc");
include("debian_package.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);
flag = 0;
if (deb_check(release:"10.0", prefix:"sddm", reference:"0.18.0-1+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"sddm-theme-debian-elarun", reference:"0.18.0-1+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"sddm-theme-debian-maui", reference:"0.18.0-1+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"sddm-theme-elarun", reference:"0.18.0-1+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"sddm-theme-maldives", reference:"0.18.0-1+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"sddm-theme-maui", reference:"0.18.0-1+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"sddm-theme-maya", reference:"0.18.0-1+deb10u1")) flag++;
if (flag)
{
if (report_verbosity > 0) security_note(port:0, extra:deb_report_get());
else security_note(0);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
Vendor | Product | Version | CPE |
---|---|---|---|
debian | debian_linux | sddm | p-cpe:/a:debian:debian_linux:sddm |
debian | debian_linux | 10.0 | cpe:/o:debian:debian_linux:10.0 |
3.3 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:L/AC:M/Au:N/C:P/I:P/A:N
6.3 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
6.2 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
5.1%