The remote host is missing an update for the 'dhclient' package(s) announced via the referenced advisory. The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows individual devices on an IP network to get their own network configuration information, including an IP address, a subnet mask, and a broadcast address. It was discovered that the DHCP client daemon, dhclient, did not sufficiently sanitize certain options provided in DHCP server replies, such as the client hostname. A malicious DHCP server could send such an option with a specially-crafted value to a DHCP client. If this option's value was saved on the client system, and then later insecurely evaluated by a process that assumes the option is trusted, it could lead to arbitrary code execution with the privileges of that process. Red Hat would like to thank Sebastian Krahmer of the SuSE Security Team for reporting this issue. All dhclient users should upgrade to these updated packages, which contain a backported patch to correct this issue
Reporter | Title | Published | Views | Family All 112 |
---|---|---|---|---|
![]() | Immunity Canvas: CVE_2011_0997 | 8 Apr 201115:17 | – | canvas |
![]() | ISC dhclient Vulnerability | 8 Apr 201100:00 | – | cisa |
![]() | CVE-2011-0997 | 8 Apr 201115:00 | – | cvelist |
![]() | SOL13219 - DHCP Client vulnerability CVE-2011-0997 | 23 Nov 201100:00 | – | f5 |
![]() | K13219 : DHCP Client vulnerability CVE-2011-0997 | 5 Sep 201300:00 | – | f5 |
![]() | Apple Time Capsule and AirPort Base Station (802.11n) Firmware < 7.6 (APPLE-SA-2011-11-10-2) | 16 Nov 201100:00 | – | nessus |
![]() | Fedora 14 : dhcp-4.2.0-21.P2.fc14 (2011-4897) | 13 Apr 201100:00 | – | nessus |
![]() | Fedora 15 : dhcp-4.2.1-4.P1.fc15 (2011-4934) | 18 Apr 201100:00 | – | nessus |
![]() | Oracle Linux 4 / 5 / 6 : dhcp (ELSA-2011-0428) | 12 Jul 201300:00 | – | nessus |
![]() | openSUSE Security Update : dhcp (openSUSE-SU-2011:0321-1) | 13 Jun 201400:00 | – | nessus |
# SPDX-FileCopyrightText: 2011 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only
if(description)
{
script_xref(name:"URL", value:"http://lists.centos.org/pipermail/centos-announce/2011-April/017280.html");
script_oid("1.3.6.1.4.1.25623.1.0.880486");
script_version("2023-07-12T05:05:04+0000");
script_tag(name:"last_modification", value:"2023-07-12 05:05:04 +0000 (Wed, 12 Jul 2023)");
script_tag(name:"creation_date", value:"2011-04-11 15:05:25 +0200 (Mon, 11 Apr 2011)");
script_tag(name:"cvss_base", value:"7.5");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
script_xref(name:"CESA", value:"2011:0428");
script_cve_id("CVE-2011-0997");
script_name("CentOS Update for dhclient CESA-2011:0428 centos4 i386");
script_tag(name:"summary", value:"The remote host is missing an update for the 'dhclient'
package(s) announced via the referenced advisory.");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2011 Greenbone AG");
script_family("CentOS Local Security Checks");
script_dependencies("gather-package-list.nasl");
script_mandatory_keys("ssh/login/centos", "ssh/login/rpms", re:"ssh/login/release=CentOS4");
script_tag(name:"affected", value:"dhclient on CentOS 4");
script_tag(name:"insight", value:"The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows
individual devices on an IP network to get their own network configuration
information, including an IP address, a subnet mask, and a broadcast
address.
It was discovered that the DHCP client daemon, dhclient, did not
sufficiently sanitize certain options provided in DHCP server replies, such
as the client hostname. A malicious DHCP server could send such an option
with a specially-crafted value to a DHCP client. If this option's value was
saved on the client system, and then later insecurely evaluated by a
process that assumes the option is trusted, it could lead to arbitrary code
execution with the privileges of that process. (CVE-2011-0997)
Red Hat would like to thank Sebastian Krahmer of the SuSE Security Team for
reporting this issue.
All dhclient users should upgrade to these updated packages, which contain
a backported patch to correct this issue.");
script_tag(name:"solution", value:"Please install the updated packages.");
script_tag(name:"qod_type", value:"package");
script_tag(name:"solution_type", value:"VendorFix");
exit(0);
}
include("revisions-lib.inc");
include("pkg-lib-rpm.inc");
release = rpm_get_ssh_release();
if(!release)
exit(0);
res = "";
if(release == "CentOS4")
{
if ((res = isrpmvuln(pkg:"dhclient", rpm:"dhclient~3.0.1~67.el4", rls:"CentOS4")) != NULL)
{
security_message(data:res);
exit(0);
}
if ((res = isrpmvuln(pkg:"dhcp", rpm:"dhcp~3.0.1~67.el4", rls:"CentOS4")) != NULL)
{
security_message(data:res);
exit(0);
}
if ((res = isrpmvuln(pkg:"dhcp-devel", rpm:"dhcp-devel~3.0.1~67.el4", rls:"CentOS4")) != NULL)
{
security_message(data:res);
exit(0);
}
if (__pkg_match) exit(99);
exit(0);
}
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