4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:N/I:N/A:P
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.8 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
34.9%
The remote host is missing an update for the Debian
# SPDX-FileCopyrightText: 2021 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.892669");
script_cve_id("CVE-2021-3541");
script_tag(name:"creation_date", value:"2021-05-31 03:00:11 +0000 (Mon, 31 May 2021)");
script_version("2024-02-02T05:06:07+0000");
script_tag(name:"last_modification", value:"2024-02-02 05:06:07 +0000 (Fri, 02 Feb 2024)");
script_tag(name:"cvss_base", value:"4.0");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:N/I:N/A:P");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2021-07-12 16:35:19 +0000 (Mon, 12 Jul 2021)");
script_name("Debian: Security Advisory (DLA-2669-1)");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2021 Greenbone AG");
script_family("Debian Local Security Checks");
script_dependencies("gather-package-list.nasl");
script_mandatory_keys("ssh/login/debian_linux", "ssh/login/packages", re:"ssh/login/release=DEB9");
script_xref(name:"Advisory-ID", value:"DLA-2669-1");
script_xref(name:"URL", value:"https://www.debian.org/lts/security/2021/DLA-2669-1");
script_xref(name:"URL", value:"https://blog.hartwork.org/posts/cve-2021-3541-parameter-laughs-fixed-in-libxml2-2-9-11/");
script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/libxml2");
script_xref(name:"URL", value:"https://wiki.debian.org/LTS");
script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'libxml2' package(s) announced via the DLA-2669-1 advisory.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");
script_tag(name:"insight", value:"An issue has been found in libxml2, the GNOME XML library. This issue is called 'Parameter Laughs'-attack and is related to parameter entities expansion. It is similar to the 'Billion Laughs'-attacks found earlier in libexpat. More information can be found at [1]
[1] [link moved to references]
For Debian 9 stretch, this problem has been fixed in version 2.9.4+dfsg1-2.2+deb9u5.
We recommend that you upgrade your libxml2 packages.
For the detailed security status of libxml2 please refer to its security tracker page at: [link moved to references]
Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: [link moved to references]");
script_tag(name:"affected", value:"'libxml2' package(s) on Debian 9.");
script_tag(name:"solution", value:"Please install the updated package(s).");
script_tag(name:"solution_type", value:"VendorFix");
script_tag(name:"qod_type", value:"package");
exit(0);
}
include("revisions-lib.inc");
include("pkg-lib-deb.inc");
release = dpkg_get_ssh_release();
if(!release)
exit(0);
res = "";
report = "";
if(release == "DEB9") {
if(!isnull(res = isdpkgvuln(pkg:"libxml2", ver:"2.9.4+dfsg1-2.2+deb9u5", rls:"DEB9"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"libxml2-dbg", ver:"2.9.4+dfsg1-2.2+deb9u5", rls:"DEB9"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"libxml2-dev", ver:"2.9.4+dfsg1-2.2+deb9u5", rls:"DEB9"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"libxml2-doc", ver:"2.9.4+dfsg1-2.2+deb9u5", rls:"DEB9"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"libxml2-utils", ver:"2.9.4+dfsg1-2.2+deb9u5", rls:"DEB9"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"libxml2-utils-dbg", ver:"2.9.4+dfsg1-2.2+deb9u5", rls:"DEB9"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"python-libxml2", ver:"2.9.4+dfsg1-2.2+deb9u5", rls:"DEB9"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"python-libxml2-dbg", ver:"2.9.4+dfsg1-2.2+deb9u5", rls:"DEB9"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"python3-libxml2", ver:"2.9.4+dfsg1-2.2+deb9u5", rls:"DEB9"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"python3-libxml2-dbg", ver:"2.9.4+dfsg1-2.2+deb9u5", rls:"DEB9"))) {
report += res;
}
if(report != "") {
security_message(data:report);
} else if(__pkg_match) {
exit(99);
}
exit(0);
}
exit(0);
4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:N/I:N/A:P
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.8 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
34.9%