Cisco IOS XE GNU GNU C Library (glibc) Buffer Overflow (CSCus69731) (GHOST)

Critical Nessus Plugin ID 81595

Synopsis

The remote device is missing a vendor-supplied security patch.

Description

The remote Cisco device is running a version of Cisco IOS XE software that is potentially affected by a heap-based buffer overflow vulnerability in the GNU C Library (glibc) due to improperly validated user-supplied input to the __nss_hostname_digits_dots(), gethostbyname(), and gethostbyname2() functions. This allows a remote attacker to cause a buffer overflow, resulting in a denial of service condition or the execution of arbitrary code.

Note that this issue only affects those IOS XE instances that are running as a 'Nova' device, and thus, if the remote IOS XE instance is not running as a 'Nova' device, consider this a false positive.

Solution

Apply the relevant patch referenced in Cisco bug ID CSCus69731.

See Also

https://tools.cisco.com/bugsearch/bug/CSCus69731

http://www.nessus.org/u?fd2144f8

http://www.nessus.org/u?c7a6ddbd

Plugin Details

Severity: Critical

ID: 81595

File Name: cisco-sa-20150128-ghost-iosxe_nova.nasl

Version: 1.10

Type: local

Family: CISCO

Published: 2015/03/02

Updated: 2019/11/22

Dependencies: 67217

Configuration: Enable paranoid mode

Risk Information

Risk Factor: Critical

CVSS Score Source: CVE-2015-0235

CVSS v2.0

Base Score: 10

Temporal Score: 8.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: CVSS2#E:H/RL:OF/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:ios_xe

Required KB Items: Host/Cisco/IOS-XE/Version, Settings/ParanoidReport

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2015/02/20

Vulnerability Publication Date: 2015/01/27

Exploitable With

Core Impact

Metasploit (Exim GHOST (glibc gethostbyname) Buffer Overflow)

Reference Information

CVE: CVE-2015-0235

BID: 72325

CERT: 967332

CISCO-BUG-ID: CSCus69731

CISCO-SA: cisco-sa-20150128-ghost