Debian DSA-091-1 : ssh - influencing login

2004-09-29T00:00:00
ID DEBIAN_DSA-091.NASL
Type nessus
Reporter Tenable
Modified 2018-07-20T00:00:00

Description

If the UseLogin feature is enabled in ssh local users could pass environment variables (including variables like LD_PRELOAD) to the login process. This has been fixed by not copying the environment if UseLogin is enabled.

Please note that the default configuration for Debian does not have UseLogin enabled.

                                        
                                            #%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-091. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(14928);
  script_version("1.20");
  script_cvs_date("Date: 2018/07/20  2:17:10");

  script_cve_id("CVE-2001-0872");
  script_bugtraq_id(3614);
  script_xref(name:"DSA", value:"091");

  script_name(english:"Debian DSA-091-1 : ssh - influencing login");
  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:
"If the UseLogin feature is enabled in ssh local users could pass
 environment variables (including variables like LD_PRELOAD) to the
 login process. This has been fixed by not copying the environment if
 UseLogin is enabled.

Please note that the default configuration for Debian does not have
UseLogin enabled."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.debian.org/security/2001/dsa-091"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"This has been fixed in version 1:1.2.3-9.4."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/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:debian:debian_linux:ssh");
  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_set_attribute(attribute:"vuln_publication_date", value:"2001/12/04");
  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:"ssh", reference:"1.2.3-9.4")) flag++;
if (deb_check(release:"2.2", prefix:"ssh-askpass-gnome", reference:"1.2.3-9.4")) flag++;
if (deb_check(release:"2.2", prefix:"ssh-askpass-ptk", reference:"1.2.3-9.4")) flag++;

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