CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
99.9%
It was discovered that the default blacklist of XStream, a Java library to serialise objects to XML and back again, was vulnerable to the execution of arbitrary shell commands by manipulating the processed input stream.
For additional defense-in-depth it is recommended to switch to the whitelist approach of XStream’s security framework. For additional information please refer to https://github.com/x-stream/xstream/security/advisories/GHSA-mw36-7c6c
-q4q2
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DSA-4811. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('compat.inc');
if (description)
{
script_id(144311);
script_version("1.5");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/01");
script_cve_id("CVE-2020-26217");
script_xref(name:"DSA", value:"4811");
script_xref(name:"CEA-ID", value:"CEA-2021-0025");
script_name(english:"Debian DSA-4811-1 : libxstream-java - security update");
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 the default blacklist of XStream, a Java
library to serialise objects to XML and back again, was vulnerable to
the execution of arbitrary shell commands by manipulating the
processed input stream.
For additional defense-in-depth it is recommended to switch to the
whitelist approach of XStream's security framework. For additional
information please refer to
https://github.com/x-stream/xstream/security/advisories/GHSA-mw36-7c6c
-q4q2");
# https://github.com/x-stream/xstream/security/advisories/GHSA-mw36-7c6c-q4q2
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d346353f");
# https://security-tracker.debian.org/tracker/source-package/libxstream-java
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b2068716");
script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/libxstream-java");
script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2020/dsa-4811");
script_set_attribute(attribute:"solution", value:
"Upgrade the libxstream-java packages.
For the stable distribution (buster), this problem has been fixed in
version 1.4.11.1-1+deb10u1.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-26217");
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:"2020/11/16");
script_set_attribute(attribute:"patch_publication_date", value:"2020/12/15");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/12/16");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxstream-java");
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:"libxstream-java", reference:"1.4.11.1-1+deb10u1")) 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");
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
99.9%