Cisco ASA libsrtp DoS (CSCux00686)

high Nessus Plugin ID 91759

Synopsis

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

Description

The remote Cisco Adaptive Security Appliance (ASA) is missing vendor-supplied security patches, and it is configured to use the Phone Proxy feature. It is, therefore, affected by an integer underflow condition in the Secure Real-Time Transport Protocol (SRTP) library due to improper validation of certain fields of SRTP packets.
An unauthenticated, remote attacker can exploit this, via specially crafted SRTP packets, to cause packet decryption to fail, resulting in a denial of service condition.

Solution

Apply the relevant patch or workaround referenced in Cisco Security Advisory cisco-sa-20160420-libsrtp.

See Also

http://www.nessus.org/u?2658d700

Plugin Details

Severity: High

ID: 91759

File Name: cisco-sa-20160420-libsrtp-asa.nasl

Version: 1.10

Type: local

Family: CISCO

Published: 6/22/2016

Updated: 11/19/2019

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS Score Source: CVE-2015-6360

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:cisco:adaptive_security_appliance_software

Required KB Items: Host/Cisco/ASA, Host/Cisco/ASA/model

Exploit Ease: No known exploits are available

Patch Publication Date: 11/25/2015

Vulnerability Publication Date: 11/2/2015

Reference Information

CVE: CVE-2015-6360

CISCO-BUG-ID: CSCux00686

CISCO-SA: cisco-sa-20160420-libsrtp