Cisco ASA up to 9.1 SIP HTTP POST Request input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Cisco ASA up to 9.1. This issue affects some unknown processing of the component SIP Handler. The manipulation as part of HTTP POST Request leads to input validation. This vulnerability is listed as CVE-2014-2129. There is no available exploit. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Cisco ASA up to 9.1 (Firewall Software). This issue affects an unknown code of the component SIP Handler. The manipulation as part of a HTTP POST Request leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. The summary by CVE is:

The SIP inspection engine in Cisco Adaptive Security Appliance (ASA) Software 8.2 before 8.2(5.48), 8.4 before 8.4(6.5), 9.0 before 9.0(3.1), and 9.1 before 9.1(2.5) allows remote attackers to cause a denial of service (memory consumption or device reload) via crafted SIP packets, aka Bug ID CSCuh44052.

The weakness was presented 04/09/2014 by Jonathan Claudius with Cisco as cisco-sa-20140409-asa as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. The public release was coordinated in cooperation with Cisco. The advisory contains:

Only transit traffic that is inspected by the Cisco ASA SIP inspection engine can be used to exploit this vulnerability. This vulnerability affects Cisco ASA Software configured in routed and transparent firewall mode and single or multiple context mode. This vulnerability can be triggered by IPv4 and IPv6 traffic.
The identification of this vulnerability is CVE-2014-2129 since 02/25/2014. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The advisory points out:
The vulnerability is due to improper handling of SIP packets inspected by the Cisco ASA SIP inspection engine. An attacker could exploit this vulnerability by sending crafted SIP packets through the affected system. An exploit could allow the attacker to cause the exhaustion of available memory. This may cause system instability and in some cases lead to a reload of the affected system, creating a denial of service condition.

The vulnerability scanner Nessus provides a plugin with the ID 73533 (Cisco ASA Software Multiple Vulnerabilities (cisco-sa-20140409-asa)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO. The commercial vulnerability scanner Qualys is able to test this issue with plugin 43387 (Cisco Adaptive Security Appliance (ASA) Software ASA SIP Denial of Service Vulnerability (CSCuh44052)).

Applying the patch cisco-sa-20140409-asa is able to eliminate this problem. The bugfix is ready for download at tools.cisco.com. It is possible to mitigate the problem by applying the configuration setting policy-map global_policy; class inspection_default; no inspect sip.Addressing this vulnerability is possible by firewalling IPv4/IPv6. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (92386), Tenable (73533), SecurityFocus (BID 66745†), Secunia (SA57820†) and SecurityTracker (ID 1030046†). tools.cisco.com is providing further details. See VDB-12862, VDB-12861 and VDB-12860 for similar entries. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 7.5
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 73533
Nessus Name: Cisco ASA Software Multiple Vulnerabilities (cisco-sa-20140409-asa)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: cisco-sa-20140409-asa
Config: policy-map global_policy; class inspection_default; no inspect sip
Firewalling: 🔍

Timelineinfo

02/25/2014 🔍
04/09/2014 +43 days 🔍
04/09/2014 +0 days 🔍
04/09/2014 +0 days 🔍
04/09/2014 +0 days 🔍
04/09/2014 +0 days 🔍
04/10/2014 +1 days 🔍
04/10/2014 +0 days 🔍
04/10/2014 +0 days 🔍
04/10/2014 +0 days 🔍
12/19/2024 +3906 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20140409-asa
Researcher: Jonathan Claudius
Organization: Cisco
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2014-2129 (🔍)
GCVE (CVE): GCVE-0-2014-2129
GCVE (VulDB): GCVE-100-12863

IAVM: 🔍

X-Force: 92386 - Cisco Adaptive Security Appliance SIP denial of service, High Risk
SecurityFocus: 66745 - Cisco ASA Software CVE-2014-2129 Denial of Service Vulnerability
Secunia: 57820 - Cisco Adaptive Security Appliance (ASA) Multiple Vulnerabilities, Moderately Critical
SecurityTracker: 1030046 - Cisco ASA Bugs Let Remote Users Access the Internal Network or Deny Service and Remote Authenticated Users Gain Elevated Privileges
Vulnerability Center: 43985 - [cisco-sa-20140409-asa] Cisco ASA Remote Denial of Service via Crafted SIP Packets, Medium

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 04/10/2014 10:26
Updated: 12/19/2024 10:48
Changes: 04/10/2014 10:26 (57), 05/25/2017 10:16 (37), 06/16/2021 19:26 (3), 12/19/2024 10:48 (16)
Complete: 🔍
Cache ID: 216:A57:103

Be aware that VulDB is the high quality source for vulnerability data.

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