CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
EPSS
Percentile
87.8%
Use anchored failregex for filters to avoid possible DoS. Manually picked up from the current status of 0.8 branch (as of 0.8.13-29-g09b2016) :
CVE-2013-7176: postfix.conf - anchored on the front, expects ‘postfix/smtpd’ prefix in the log line
CVE-2013-7177: cyrus-imap.conf - anchored on the front, and refactored to have a single failregex
couriersmtp.conf - anchored on both sides
exim.conf - front-anchored versions picked up from exim.conf and exim-spam.conf
lighttpd-fastcgi.conf - front-anchored picked up from suhosin.conf (copied from the Wheezy version)
Catch also failed logins via secured (imaps/pop3s) for cyrus-imap. Regression was introduced while strengthening failregex in 0.8.11 (bd175f) Debian bug #755173
cyrus-imap: catch ‘user not found’ attempts
NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-21-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(82169);
script_version("1.5");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");
script_cve_id("CVE-2013-7176", "CVE-2013-7177");
script_bugtraq_id(65184, 65187);
script_name(english:"Debian DLA-21-1 : fail2ban 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 update."
);
script_set_attribute(
attribute:"description",
value:
" - Use anchored failregex for filters to avoid possible
DoS. Manually picked up from the current status of 0.8
branch (as of 0.8.13-29-g09b2016) :
- CVE-2013-7176: postfix.conf - anchored on the front,
expects 'postfix/smtpd' prefix in the log line
- CVE-2013-7177: cyrus-imap.conf - anchored on the front,
and refactored to have a single failregex
- couriersmtp.conf - anchored on both sides
- exim.conf - front-anchored versions picked up from
exim.conf and exim-spam.conf
- lighttpd-fastcgi.conf - front-anchored picked up from
suhosin.conf (copied from the Wheezy version)
- Catch also failed logins via secured (imaps/pop3s) for
cyrus-imap. Regression was introduced while
strengthening failregex in 0.8.11 (bd175f) Debian bug
#755173
- cyrus-imap: catch 'user not found' attempts
NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA 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://lists.debian.org/debian-lts-announce/2014/07/msg00007.html"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/squeeze-lts/fail2ban"
);
script_set_attribute(
attribute:"solution",
value:"Upgrade the affected fail2ban package."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
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:fail2ban");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:6.0");
script_set_attribute(attribute:"patch_publication_date", value:"2014/07/26");
script_set_attribute(attribute:"plugin_publication_date", value:"2015/03/26");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2015-2021 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:"6.0", prefix:"fail2ban", reference:"0.8.4-3+squeeze3")) 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");