Debian DSA-090-1 : xtel - symlink attack

2004-09-29T00:00:00
ID DEBIAN_DSA-090.NASL
Type nessus
Reporter Tenable
Modified 2018-07-20T00:00:00

Description

The xtel (an X emulator for minitel) package as distributed with Debian GNU/Linux 2.2 has two possible symlink attacks :

  • xteld creates a temporary file /tmp/.xtel-<user> without checking for symlinks.
  • when printing a hardcopy xtel would create a temporary file without protecting itself against symlink attacks.

Both problems have been fixed in version 3.2.1-4.potato.1 .

                                        
                                            #%NASL_MIN_LEVEL 70103

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-090. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(14927);
  script_version("1.18");
  script_cvs_date("Date: 2018/07/20  2:17:10");

  script_cve_id("CVE-2002-0334");
  script_bugtraq_id(3626);
  script_xref(name:"DSA", value:"090");

  script_name(english:"Debian DSA-090-1 : xtel - symlink attack");
  script_summary(english:"Checks dpkg output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The xtel (an X emulator for minitel) package as distributed with
Debian GNU/Linux 2.2 has two possible symlink attacks :

  - xteld creates a temporary file /tmp/.xtel-&lt;user&gt; without
    checking for symlinks.
  - when printing a hardcopy xtel would create a temporary
    file without protecting itself against symlink attacks.

Both problems have been fixed in version 3.2.1-4.potato.1 ."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.debian.org/security/2001/dsa-090"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade the affected xtel package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:N/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xtel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:2.2");

  script_set_attribute(attribute:"patch_publication_date", value:"2001/12/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2004/09/29");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2004-2018 Tenable Network Security, Inc.");
  script_family(english:"Debian Local Security Checks");

  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:"2.2", prefix:"xtel", reference:"3.2.1-4.potato.1")) flag++;

if (flag)
{
  if (report_verbosity &gt; 0) security_note(port:0, extra:deb_report_get());
  else security_note(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");