Several security vulnerabilities affecting ISC dhcpd, a server for automatic IP address assignment, have been discovered. Additionally, the latest security update for isc-dhcp, DSA-2516-1, did not properly apply the patches for CVE-2012-3571 and CVE-2012-3954. This has been addressed in this additional update.
CVE-2011-4539 BlueCat Networks discovered that it is possible to crash DHCP servers configured to evaluate requests with regular expressions via crafted DHCP request packets.
CVE-2012-3571 Markus Hietava of the Codenomicon CROSS project discovered that it is possible to force the server to enter an infinite loop via messages with malformed client identifiers.
CVE-2012-3954 Glen Eustace discovered that DHCP servers running in DHCPv6 mode and possibly DHCPv4 mode suffer of memory leaks while processing messages. An attacker can use this flaw to exhaust resources and perform denial of service attacks.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DSA-2519. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(61382);
script_version("1.15");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");
script_cve_id("CVE-2011-4539", "CVE-2012-3571", "CVE-2012-3954");
script_bugtraq_id(50971, 54665);
script_xref(name:"DSA", value:"2519");
script_name(english:"Debian DSA-2519-2 : isc-dhcp - 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 security vulnerabilities affecting ISC dhcpd, a server for
automatic IP address assignment, have been discovered. Additionally,
the latest security update for isc-dhcp, DSA-2516-1, did not properly
apply the patches for CVE-2012-3571 and CVE-2012-3954. This has been
addressed in this additional update.
- CVE-2011-4539
BlueCat Networks discovered that it is possible to crash
DHCP servers configured to evaluate requests with
regular expressions via crafted DHCP request packets.
- CVE-2012-3571
Markus Hietava of the Codenomicon CROSS project
discovered that it is possible to force the server to
enter an infinite loop via messages with malformed
client identifiers.
- CVE-2012-3954
Glen Eustace discovered that DHCP servers running in
DHCPv6 mode and possibly DHCPv4 mode suffer of memory
leaks while processing messages. An attacker can use
this flaw to exhaust resources and perform denial of
service attacks."
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2012-3571"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2012-3954"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2011-4539"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2012-3571"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2012-3954"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/squeeze/isc-dhcp"
);
script_set_attribute(
attribute:"see_also",
value:"https://www.debian.org/security/2012/dsa-2519"
);
script_set_attribute(
attribute:"solution",
value:
"Upgrade the isc-dhcp packages.
For the stable distribution (squeeze), this problem has been fixed in
version 4.1.1-P1-15+squeeze6."
);
script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:N/C:N/I:N/A:C");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
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:isc-dhcp");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:6.0");
script_set_attribute(attribute:"patch_publication_date", value:"2012/08/04");
script_set_attribute(attribute:"plugin_publication_date", value:"2012/08/02");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2012-2021 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:"dhcp3-client", reference:"4.1.1-P1-15+squeeze6")) flag++;
if (deb_check(release:"6.0", prefix:"dhcp3-common", reference:"4.1.1-P1-15+squeeze6")) flag++;
if (deb_check(release:"6.0", prefix:"dhcp3-dev", reference:"4.1.1-P1-15+squeeze6")) flag++;
if (deb_check(release:"6.0", prefix:"dhcp3-relay", reference:"4.1.1-P1-15+squeeze6")) flag++;
if (deb_check(release:"6.0", prefix:"dhcp3-server", reference:"4.1.1-P1-15+squeeze6")) flag++;
if (deb_check(release:"6.0", prefix:"isc-dhcp-client", reference:"4.1.1-P1-15+squeeze6")) flag++;
if (deb_check(release:"6.0", prefix:"isc-dhcp-client-dbg", reference:"4.1.1-P1-15+squeeze6")) flag++;
if (deb_check(release:"6.0", prefix:"isc-dhcp-client-udeb", reference:"4.1.1-P1-15+squeeze6")) flag++;
if (deb_check(release:"6.0", prefix:"isc-dhcp-common", reference:"4.1.1-P1-15+squeeze6")) flag++;
if (deb_check(release:"6.0", prefix:"isc-dhcp-dev", reference:"4.1.1-P1-15+squeeze6")) flag++;
if (deb_check(release:"6.0", prefix:"isc-dhcp-relay", reference:"4.1.1-P1-15+squeeze6")) flag++;
if (deb_check(release:"6.0", prefix:"isc-dhcp-relay-dbg", reference:"4.1.1-P1-15+squeeze6")) flag++;
if (deb_check(release:"6.0", prefix:"isc-dhcp-server", reference:"4.1.1-P1-15+squeeze6")) flag++;
if (deb_check(release:"6.0", prefix:"isc-dhcp-server-dbg", reference:"4.1.1-P1-15+squeeze6")) flag++;
if (deb_check(release:"6.0", prefix:"isc-dhcp-server-ldap", reference:"4.1.1-P1-15+squeeze6")) 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");
Vendor | Product | Version | CPE |
---|---|---|---|
debian | debian_linux | isc-dhcp | p-cpe:/a:debian:debian_linux:isc-dhcp |
debian | debian_linux | 6.0 | cpe:/o:debian:debian_linux:6.0 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4539
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-3571
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-3954
packages.debian.org/source/squeeze/isc-dhcp
security-tracker.debian.org/tracker/CVE-2011-4539
security-tracker.debian.org/tracker/CVE-2012-3571
security-tracker.debian.org/tracker/CVE-2012-3954
www.debian.org/security/2012/dsa-2519