Debian DSA-735-1 : sudo - pathname validation race

#%NASL_MIN_LEVEL 70300

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-735. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(18603);
  script_version("1.13");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");

  script_cve_id("CVE-2005-1993");
  script_xref(name:"DSA", value:"735");

  script_name(english:"Debian DSA-735-1 : sudo - pathname validation race");
  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:
"A local user who has been granted permission to run commands via sudo
could run arbitrary commands as a privileged user due to a flaw in
sudo's pathname validation. This bug only affects configurations which
have restricted user configurations prior to an ALL directive in the
configuration file. A workaround is to move any ALL directives to the
beginning of the sudoers file; see the advisory at for more
information."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=315115"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.debian.org/security/2005/dsa-735"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the sudo package.

For the old stable Debian distribution (woody), this problem has been
fixed in version 1.6.6-1.3woody1.

For the current stable distribution (sarge), this problem has been
fixed in version 1.6.8p7-1.1sarge1.

Note that packages are not yet ready for certain architectures; these
will be released as they become available."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/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:debian:debian_linux:sudo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:3.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:3.1");

  script_set_attribute(attribute:"patch_publication_date", value:"2005/07/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2005/07/05");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2005-2021 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:"3.0", prefix:"sudo", reference:"1.6.6-1.3woody1")) flag++;
if (deb_check(release:"3.1", prefix:"sudo", reference:"1.6.8p7-1.1sarge1")) flag++;

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