GLSA-200701-13 : Fetchmail: Denial of Service and password disclosure

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 200701-13.
#
# The advisory text is Copyright (C) 2001-2015 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike 
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

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

if (description)
{
  script_id(24249);
  script_version("1.16");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");

  script_cve_id("CVE-2006-5867", "CVE-2006-5974");
  script_bugtraq_id(21902, 21903);
  script_xref(name:"GLSA", value:"200701-13");

  script_name(english:"GLSA-200701-13 : Fetchmail: Denial of Service and password disclosure");
  script_summary(english:"Checks for updated package(s) in /var/db/pkg");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Gentoo host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The remote host is affected by the vulnerability described in GLSA-200701-13
(Fetchmail: Denial of Service and password disclosure)

    Neil Hoggarth has discovered that when delivering messages to a message
    delivery agent by means of the 'mda' option, Fetchmail passes a NULL
    pointer to the ferror() and fflush() functions when refusing a message.
    Isaac Wilcox has discovered numerous means of plain-text password
    disclosure due to errors in secure connection establishment.
  
Impact :

    An attacker could deliver a message via Fetchmail to a message delivery
    agent configured to refuse the message, and crash the Fetchmail
    process. SMTP and LMTP delivery modes are not affected by this
    vulnerability. An attacker could also perform a Man-in-the-Middle
    attack, and obtain plain-text authentication credentials of users
    connecting to a Fetchmail process.
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/200701-13"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All fetchmail users should upgrade to the latest version:
    # emerge --sync
    # emerge --ask --oneshot --verbose '>=net-mail/fetchmail-6.3.6'"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N");
  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(20);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:fetchmail");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2007/01/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2007/01/26");
  script_set_attribute(attribute:"vuln_publication_date", value:"2007/01/04");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2007-2021 Tenable Network Security, Inc.");
  script_family(english:"Gentoo Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("qpkg.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (qpkg_check(package:"net-mail/fetchmail", unaffected:make_list("ge 6.3.6"), vulnerable:make_list("lt 6.3.6"))) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:qpkg_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "Fetchmail");
}