6.7 Medium
AI Score
Confidence
Low
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.97 High
EPSS
Percentile
99.7%
The remote host is missing an update for the
# 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/017295.html");
script_oid("1.3.6.1.4.1.25623.1.0.880543");
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:"2011-08-09 08:20:34 +0200 (Tue, 09 Aug 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 centos5 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=CentOS5");
script_tag(name:"affected", value:"dhclient on CentOS 5");
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 == "CentOS5")
{
if ((res = isrpmvuln(pkg:"dhclient", rpm:"dhclient~3.0.5~23.el5_6.4", rls:"CentOS5")) != NULL)
{
security_message(data:res);
exit(0);
}
if ((res = isrpmvuln(pkg:"dhcp", rpm:"dhcp~3.0.5~23.el5_6.4", rls:"CentOS5")) != NULL)
{
security_message(data:res);
exit(0);
}
if ((res = isrpmvuln(pkg:"dhcp-devel", rpm:"dhcp-devel~3.0.5~23.el5_6.4", rls:"CentOS5")) != NULL)
{
security_message(data:res);
exit(0);
}
if ((res = isrpmvuln(pkg:"libdhcp4client", rpm:"libdhcp4client~3.0.5~23.el5_6.4", rls:"CentOS5")) != NULL)
{
security_message(data:res);
exit(0);
}
if ((res = isrpmvuln(pkg:"libdhcp4client-devel", rpm:"libdhcp4client-devel~3.0.5~23.el5_6.4", rls:"CentOS5")) != NULL)
{
security_message(data:res);
exit(0);
}
if (__pkg_match) exit(99);
exit(0);
}