7.2 High
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
7.8 High
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
0.0004 Low
EPSS
Percentile
12.7%
It was discovered that a hook script of ldm, the display manager for the Linux Terminal Server Project, incorrectly parsed responses from an SSH server, which could result in local root privilege escalation.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DSA-4601. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include("compat.inc");
if (description)
{
script_id(132761);
script_version("1.5");
script_cvs_date("Date: 2020/01/28");
script_cve_id("CVE-2019-20373");
script_xref(name:"DSA", value:"4601");
script_name(english:"Debian DSA-4601-1 : ldm - security update");
script_summary(english:"Checks dpkg output for the updated package");
script_set_attribute(
attribute:"synopsis",
value:"The remote Debian host is missing a security-related update."
);
script_set_attribute(
attribute:"description",
value:
"It was discovered that a hook script of ldm, the display manager for
the Linux Terminal Server Project, incorrectly parsed responses from
an SSH server, which could result in local root privilege escalation."
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/source-package/ldm"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/stretch/ldm"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/buster/ldm"
);
script_set_attribute(
attribute:"see_also",
value:"https://www.debian.org/security/2020/dsa-4601"
);
script_set_attribute(
attribute:"solution",
value:
"Upgrade the ldm packages.
For the oldstable distribution (stretch), this problem has been fixed
in version 2:2.2.18-2+deb9u1.
For the stable distribution (buster), this problem has been fixed in
version 2:2.18.06-1+deb10u1."
);
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:U/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:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-20373");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ldm");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
script_set_attribute(attribute:"vuln_publication_date", value:"2020/01/09");
script_set_attribute(attribute:"patch_publication_date", value:"2020/01/09");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/01/10");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"Debian Local Security Checks");
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:"ldm", reference:"2:2.18.06-1+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"ldm-server", reference:"2:2.18.06-1+deb10u1")) flag++;
if (deb_check(release:"9.0", prefix:"ldm", reference:"2:2.2.18-2+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"ldm-server", reference:"2:2.2.18-2+deb9u1")) flag++;
if (flag)
{
if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
else security_hole(0);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
Vendor | Product | Version | CPE |
---|---|---|---|
debian | debian_linux | ldm | p-cpe:/a:debian:debian_linux:ldm |
debian | debian_linux | 10.0 | cpe:/o:debian:debian_linux:10.0 |
debian | debian_linux | 9.0 | cpe:/o:debian:debian_linux:9.0 |
7.2 High
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
7.8 High
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
0.0004 Low
EPSS
Percentile
12.7%