Cisco ASA NGFW 9.1.1.8/9.1.2.11 Fragmented Traffic Reassembled Packet Data input validation

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7.2$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Cisco ASA NGFW 9.1.1.8/9.1.2.11. This issue affects some unknown processing of the component Fragmented Traffic Handler. This manipulation as part of Reassembled Packet Data causes input validation. This vulnerability is tracked as CVE-2013-3382. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco ASA NGFW 9.1.1.8/9.1.2.11 (Firewall Software). It has been declared as critical. Affected by this vulnerability is some unknown functionality of the component Fragmented Traffic Handler. The manipulation as part of a Reassembled Packet Data leads to a input validation vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

The Next-Generation Firewall (aka NGFW, formerly CX Context-Aware Security) module 9.x before 9.1.1.9 and 9.1.2.x before 9.1.2.12 for Cisco Adaptive Security Appliances (ASA) devices allows remote attackers to cause a denial of service (device reload or traffic-processing outage) via fragmented (1) IPv4 or (2) IPv6 traffic, aka Bug ID CSCue88387.
The advisory summarizes:
The Cisco ASA NGFW is an add-on services module that extends the Cisco ASA platform by delivering application and user ID awareness capabilities for enhanced visibility and control of network traffic.

The weakness was disclosed 06/26/2013 as cisco-sa-20130626-ngfw as confirmed advisory (Website). The advisory is shared at tools.cisco.com. This vulnerability is known as CVE-2013-3382 since 05/06/2013. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 70076 (Cisco ASA Next-Generation Firewall Fragmented Traffic DoS (cisco-sa-20130626-ngfw)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO. The advisory illustrates:

Under specific conditions, an attacker could exploit this vulnerability by sending fragmented IPv4 or IPv6 packets through the Cisco ASA NGFW. To exploit this vulnerability, an affected Cisco ASA NGFW must have a configured policy that denies user traffic. Processing fragmented packets against a deny policy, could cause the Cisco ASA NGFW to reload. Additionally, if the Cisco ASA, with a Cisco ASA NGFW module running an affected version of software is configured in High-Availability mode (HA), a failover event may be triggered when the Cisco ASA NGFW reloads or stops forwarding traffic.

Upgrading to version 9.1.1.9 or 9.1.2.12 eliminates this vulnerability. It is possible to mitigate the problem by applying the configuration setting policy-map cx_traffic_policy; class cx_traffic; no cxcs. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

Only user traffic specifically directed towards the Cisco ASA NGFW by the Modular Policy Framework (MPF) configuration on the parent Cisco ASA is affected by the vulnerability in this advisory. Management traffic to or from Cisco ASA NGFW is not affected by this vulnerability. (…) [F]ragmented traffic can be disallowed on the Cisco ASA firewall. This will cause the Cisco ASA firewall not to accept any fragments on its interfaces. Consequently, the Cisco ASA will not send any fragments to the Cisco ASA NGFW software module for inspection.

The vulnerability is also documented in the databases at Tenable (70076), SecurityFocus (BID 60803†), OSVDB (94606†), Secunia (SA53971†) and Vulnerability Center (SBV-40214†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 70076
Nessus Name: Cisco ASA Next-Generation Firewall Fragmented Traffic DoS (cisco-sa-20130626-ngfw)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: ASA NGFW 9.1.1.9/9.1.2.12
Config: policy-map cx_traffic_policy; class cx_traffic; no cxcs

Timelineinfo

05/06/2013 🔍
06/26/2013 +51 days 🔍
06/26/2013 +0 days 🔍
06/26/2013 +0 days 🔍
06/26/2013 +0 days 🔍
06/26/2013 +0 days 🔍
06/27/2013 +1 days 🔍
06/27/2013 +0 days 🔍
06/28/2013 +1 days 🔍
09/23/2013 +87 days 🔍
05/17/2021 +2793 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20130626-ngfw
Status: Confirmed

CVE: CVE-2013-3382 (🔍)
GCVE (CVE): GCVE-0-2013-3382
GCVE (VulDB): GCVE-100-9277

IAVM: 🔍

SecurityFocus: 60803 - Cisco ASA NGFW CVE-2013-3382 Denial of Service Vulnerability
Secunia: 53971 - Cisco ASA Next-Generation Firewall Services Fragmented Traffic Denial of Service Vulnerabi, Moderately Critical
OSVDB: 94606
Vulnerability Center: 40214 - [cisco-sa-20130626-ngfw] Cisco NGFW For Cisco ASA Allows Remote DoS via Fragmented IPv4\\IPv6 Traffic, High

Entryinfo

Created: 06/27/2013 11:52
Updated: 05/17/2021 12:08
Changes: 06/27/2013 11:52 (79), 05/04/2017 08:54 (3), 05/17/2021 12:08 (3)
Complete: 🔍
Cache ID: 216:F64:103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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