Vulnerabilities > CVE-2004-1482 - Buffer Overflow vulnerability in BNC sbuf_getmsg()

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 200410-13.
#
# 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(15476);
  script_version("1.15");
  script_cvs_date("Date: 2019/08/02 13:32:41");

  script_cve_id("CVE-2004-1482");
  script_xref(name:"GLSA", value:"200410-13");

  script_name(english:"GLSA-200410-13 : BNC: Input validation flaw");
  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-200410-13
(BNC: Input validation flaw)

    A flaw exists in the input parsing of BNC where part of the
    sbuf_getmsg() function handles the backspace character incorrectly.
  
Impact :

    A remote user could issue commands using fake authentication
    credentials and possibly gain access to scripts running on the client
    side.
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.gotbnc.com/changes.html#2.8.9"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/200410-13"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All BNC users should upgrade to the latest version:
    # emerge sync
    # emerge -pv '>=net-irc/bnc-2.8.9'
    # emerge '>=net-irc/bnc-2.8.9'"
  );
  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:bnc");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2004/10/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2004/10/15");
  script_set_attribute(attribute:"vuln_publication_date", value:"2004/10/09");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2004-2019 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-irc/bnc", unaffected:make_list("ge 2.8.9"), vulnerable:make_list("lt 2.8.9"))) 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, "BNC");
}