GLSA-200605-05 : rsync: Potential integer overflow

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 200605-05.
#
# 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('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(21347);
  script_version("1.14");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");

  script_cve_id("CVE-2006-2083");
  script_xref(name:"GLSA", value:"200605-05");

  script_name(english:"GLSA-200605-05 : rsync: Potential integer overflow");
  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-200605-05
(rsync: Potential integer overflow)

    An integer overflow was found in the receive_xattr function from
    the extended attributes patch (xattr.c) for rsync. The vulnerable
    function is only present when the 'acl' USE flag is set.
  
Impact :

    A remote attacker with write access to an rsync module could craft
    malicious extended attributes which would trigger the integer overflow,
    potentially resulting in the execution of arbitrary code with the
    rights of the rsync daemon.
  
Workaround :

    Do not provide write access to an rsync module to untrusted
    parties."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/200605-05"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All rsync users should upgrade to the latest version:
    # emerge --sync
    # emerge --ask --oneshot --verbose '>=net-misc/rsync-2.6.8'"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");

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

  script_set_attribute(attribute:"patch_publication_date", value:"2006/05/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2006/05/13");
  script_set_attribute(attribute:"vuln_publication_date", value:"2006/04/22");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2006-2021 Tenable Network Security, Inc.");
  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:"net-misc/rsync", unaffected:make_list("ge 2.6.8"), vulnerable:make_list("lt 2.6.8"))) 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, "rsync");
}