Vulnerabilities > CVE-2013-2100 - Cryptographic Issues vulnerability in Gentoo Portage 2.1.12

047910
CVSS 0.0 - NONE
Attack vector
UNKNOWN
Attack complexity
UNKNOWN
Privileges required
UNKNOWN
Confidentiality impact
UNKNOWN
Integrity impact
UNKNOWN
Availability impact
UNKNOWN
gentoo
CWE-310
nessus
NVD
Published: 2014-09-29
Updated: 2024-11-21

Summary

The urlopen function in pym/portage/util/_urlopen.py in Gentoo Portage 2.1.12, when using HTTPS, does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and modify binary package lists via a crafted certificate.

Vulnerable Configurations

Part Description Count
Application
Gentoo
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Signature Spoofing by Key Recreation
    An attacker obtains an authoritative or reputable signer's private signature key by exploiting a cryptographic weakness in the signature algorithm or pseudorandom number generation and then uses this key to forge signatures from the original signer to mislead a victim into performing actions that benefit the attacker.

Nessus

NASL familyGentoo Local Security Checks
NASL idGENTOO_GLSA-201507-16.NASL
descriptionThe remote host is affected by the vulnerability described in GLSA-201507-16 (Portage: Man-in-the-middle attack) Portage does not verify X.509 SSL certificates properly if HTTPS is used. Impact : A remote attacker can spoof servers and modify binary package lists via specially crafted certificates. Workaround : There is no known workaround at this time.
last seen2020-06-01
modified2020-06-02
plugin id86085
published2015-09-23
reporterThis script is Copyright (C) 2015-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/86085
titleGLSA-201507-16 : Portage: Man-in-the-middle attack
code
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 201507-16.
#
# The advisory text is Copyright (C) 2001-2015 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike 
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

include("compat.inc");

if (description)
{
  script_id(86085);
  script_version("2.2");
  script_cvs_date("Date: 2018/12/05 20:31:22");

  script_cve_id("CVE-2013-2100");
  script_bugtraq_id(59878);
  script_xref(name:"GLSA", value:"201507-16");

  script_name(english:"GLSA-201507-16 : Portage: Man-in-the-middle attack");
  script_summary(english:"Checks for updated package(s) in /var/db/pkg");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Gentoo host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The remote host is affected by the vulnerability described in GLSA-201507-16
(Portage: Man-in-the-middle attack)

    Portage does not verify X.509 SSL certificates properly if HTTPS is
      used.
  
Impact :

    A remote attacker can spoof servers and modify binary package lists via
      specially crafted certificates.
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/201507-16"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All Portage users should upgrade to the latest version:
      # emerge --sync
      # emerge --ask --oneshot --verbose '>=sys-apps/portage-2.1.12.2'"
  );
  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:U/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:portage");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2015/07/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/09/23");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2015-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Gentoo Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("qpkg.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (qpkg_check(package:"sys-apps/portage", unaffected:make_list("ge 2.1.12.2"), vulnerable:make_list("lt 2.1.12.2"))) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:qpkg_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "Portage");
}

References