Vulnerabilities > CVE-2009-2939 - Link Following vulnerability in Postfix 2.5.5

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-1113-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include("compat.inc");

if (description)
{
  script_id(55071);
  script_version("1.12");
  script_cvs_date("Date: 2019/09/19 12:54:27");

  script_cve_id("CVE-2009-2939", "CVE-2011-0411");
  script_bugtraq_id(36469, 46767);
  script_xref(name:"USN", value:"1113-1");

  script_name(english:"Ubuntu 6.06 LTS / 8.04 LTS / 9.10 / 10.04 LTS / 10.10 : postfix vulnerabilities (USN-1113-1)");
  script_summary(english:"Checks dpkg output for updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Ubuntu host is missing a security-related patch."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"It was discovered that the Postfix package incorrectly granted write
access on the PID directory to the postfix user. A local attacker
could use this flaw to possibly conduct a symlink attack and overwrite
arbitrary files. This issue only affected Ubuntu 6.06 LTS and 8.04
LTS. (CVE-2009-2939)

Wietse Venema discovered that Postfix incorrectly handled cleartext
commands after TLS is in place. A remote attacker could exploit this
to inject cleartext commands into TLS sessions, and possibly obtain
confidential information such as passwords. (CVE-2011-0411).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://usn.ubuntu.com/1113-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected postfix package."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/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_cwe_id(59);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postfix");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:10.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:10.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:6.06:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:8.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:9.10");

  script_set_attribute(attribute:"vuln_publication_date", value:"2009/09/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2011/04/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2011/06/13");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2011-2019 Canonical, Inc. / NASL script (C) 2011-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Ubuntu Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("ubuntu.inc");
include("misc_func.inc");

if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/Ubuntu/release");
if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
release = chomp(release);
if (! preg(pattern:"^(6\.06|8\.04|9\.10|10\.04|10\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 6.06 / 8.04 / 9.10 / 10.04 / 10.10", "Ubuntu " + release);
if ( ! get_kb_item("Host/Debian/dpkg-l") ) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Ubuntu", cpu);

flag = 0;

if (ubuntu_check(osver:"6.06", pkgname:"postfix", pkgver:"2.2.10-1ubuntu0.3")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"postfix", pkgver:"2.5.1-2ubuntu1.3")) flag++;
if (ubuntu_check(osver:"9.10", pkgname:"postfix", pkgver:"2.6.5-3ubuntu0.1")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"postfix", pkgver:"2.7.0-1ubuntu0.1")) flag++;
if (ubuntu_check(osver:"10.10", pkgname:"postfix", pkgver:"2.7.1-1ubuntu0.1")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "postfix");
}

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-2233. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(53860);
  script_version("1.16");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");

  script_cve_id("CVE-2009-2939", "CVE-2011-0411", "CVE-2011-1720");
  script_bugtraq_id(36469, 46767, 47778);
  script_xref(name:"DSA", value:"2233");

  script_name(english:"Debian DSA-2233-1 : postfix - several vulnerabilities");
  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:
"Several vulnerabilities were discovered in Postfix, a mail transfer
agent. The Common Vulnerabilities and Exposures project identifies the
following problems :

  - CVE-2009-2939
    The postinst script grants the postfix user write access
    to /var/spool/postfix/pid, which might allow local users
    to conduct symlink attacks that overwrite arbitrary
    files.

  - CVE-2011-0411
    The STARTTLS implementation does not properly restrict
    I/O buffering, which allows man-in-the-middle attackers
    to insert commands into encrypted SMTP sessions by
    sending a cleartext command that is processed after TLS
    is in place.

  - CVE-2011-1720
    A heap-based read-only buffer overflow allows malicious
    clients to crash the smtpd server process using a
    crafted SASL authentication request."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2009-2939"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2011-0411"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2011-1720"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/squeeze/postfix"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2011/dsa-2233"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the postfix packages.

For the oldstable distribution (lenny), this problem has been fixed in
version 2.5.5-1.1+lenny1.

For the stable distribution (squeeze), this problem has been fixed in
version 2.7.1-1+squeeze1."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/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_cwe_id(59);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:postfix");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:5.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:6.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2011/05/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2011/05/11");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2011-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  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:"5.0", prefix:"postfix", reference:"2.5.5-1.1+lenny1")) flag++;
if (deb_check(release:"6.0", prefix:"postfix", reference:"2.7.1-1+squeeze1")) flag++;
if (deb_check(release:"6.0", prefix:"postfix-cdb", reference:"2.7.1-1+squeeze1")) flag++;
if (deb_check(release:"6.0", prefix:"postfix-dev", reference:"2.7.1-1+squeeze1")) flag++;
if (deb_check(release:"6.0", prefix:"postfix-doc", reference:"2.7.1-1+squeeze1")) flag++;
if (deb_check(release:"6.0", prefix:"postfix-ldap", reference:"2.7.1-1+squeeze1")) flag++;
if (deb_check(release:"6.0", prefix:"postfix-mysql", reference:"2.7.1-1+squeeze1")) flag++;
if (deb_check(release:"6.0", prefix:"postfix-pcre", reference:"2.7.1-1+squeeze1")) flag++;
if (deb_check(release:"6.0", prefix:"postfix-pgsql", reference:"2.7.1-1+squeeze1")) 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");