Debian DSA-3386-1 : unzip - security update

2015-11-02T00:00:00
ID DEBIAN_DSA-3386.NASL
Type nessus
Reporter Tenable
Modified 2016-05-19T00:00:00

Description

Two vulnerabilities have been found in unzip, a de-archiver for .zip files. The Common Vulnerabilities and Exposures project identifies the following problems :

  • CVE-2015-7696 Gustavo Grieco discovered that unzip incorrectly handled certain password protected archives. If a user or automated system were tricked into processing a specially crafted zip archive, an attacker could possibly execute arbitrary code.

  • CVE-2015-7697 Gustavo Grieco discovered that unzip incorrectly handled certain malformed archives. If a user or automated system were tricked into processing a specially crafted zip archive, an attacker could possibly cause unzip to hang, resulting in a denial of service.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-3386. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(86680);
  script_version("$Revision: 2.4 $");
  script_cvs_date("$Date: 2016/05/19 17:45:44 $");

  script_cve_id("CVE-2015-7696", "CVE-2015-7697");
  script_osvdb_id(128864, 128865);
  script_xref(name:"DSA", value:"3386");

  script_name(english:"Debian DSA-3386-1 : unzip - security update");
  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:
"Two vulnerabilities have been found in unzip, a de-archiver for .zip
files. The Common Vulnerabilities and Exposures project identifies the
following problems :

  - CVE-2015-7696
    Gustavo Grieco discovered that unzip incorrectly handled
    certain password protected archives. If a user or
    automated system were tricked into processing a
    specially crafted zip archive, an attacker could
    possibly execute arbitrary code.

  - CVE-2015-7697
    Gustavo Grieco discovered that unzip incorrectly handled
    certain malformed archives. If a user or automated
    system were tricked into processing a specially crafted
    zip archive, an attacker could possibly cause unzip to
    hang, resulting in a denial of service."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=802160"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=802162"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2015-7696"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2015-7697"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/wheezy/unzip"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/unzip"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.debian.org/security/2015/dsa-3386"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the unzip packages.

For the oldstable distribution (wheezy), these problems have been
fixed in version 6.0-8+deb7u4.

For the stable distribution (jessie), these problems have been fixed
in version 6.0-16+deb8u1."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:U/RC:ND");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  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:unzip");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2015/10/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/11/02");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2015-2016 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:"7.0", prefix:"unzip", reference:"6.0-8+deb7u4")) flag++;
if (deb_check(release:"8.0", prefix:"unzip", reference:"6.0-16+deb8u1")) flag++;

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