Cisco IOS 12.2/15.0/15.1/15.2/15.3 NAT input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco IOS 12.2/15.0/15.1/15.2/15.3. It has been declared as problematic. This impacts an unknown function of the component NAT Handler. Executing a manipulation can lead to input validation. This vulnerability is tracked as CVE-2013-5481. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco IOS 12.2/15.0/15.1/15.2/15.3 (Router Operating System). It has been declared as problematic. This vulnerability affects some unknown processing of the component NAT Handler. The manipulation with an unknown input 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. CVE summarizes:

The PPTP implementation in Cisco IOS 12.2 and 15.0 through 15.3, when NAT is used, allows remote attackers to cause a denial of service (device reload) via crafted TCP port-1723 packets, aka Bug ID CSCtq14817.

The weakness was disclosed 09/25/2013 as cisco-sa-20130925-nat as confirmed advisory (Website). The advisory is shared for download at tools.cisco.com. The public release has been coordinated in cooperation with the vendor. This vulnerability was named CVE-2013-5481 since 08/22/2013. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 70320 (Cisco IOS Software Network Address Translation Vulnerabilities (cisco-sa-20130925-nat)), 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 43323 (Cisco IOS Software Network Address Translation Vulnerabilities (cisco-sa-20130925-nat)).

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (70320), SecurityFocus (BID 62637†), OSVDB (97740†) and Vulnerability Center (SBV-41626†). The entries VDB-10490 and VDB-10491 are pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.7

VulDB Base Score: 5.9
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

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: 70320
Nessus Name: Cisco IOS Software Network Address Translation Vulnerabilities (cisco-sa-20130925-nat)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

08/22/2013 🔍
09/25/2013 +33 days 🔍
09/25/2013 +0 days 🔍
09/25/2013 +0 days 🔍
09/26/2013 +1 days 🔍
09/27/2013 +1 days 🔍
09/27/2013 +0 days 🔍
09/29/2013 +2 days 🔍
05/26/2021 +2795 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20130925-nat
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2013-5481 (🔍)
GCVE (CVE): GCVE-0-2013-5481
GCVE (VulDB): GCVE-100-10492

IAVM: 🔍

SecurityFocus: 62637
OSVDB: 97740
Vulnerability Center: 41626 - [cisco-sa-20130925-nat] Cisco IOS Using NAT Remote DOS Via a Crafted TCP Stream - CVE-2013-5481, High

See also: 🔍

Entryinfo

Created: 09/26/2013 19:25
Updated: 05/26/2021 00:04
Changes: 09/26/2013 19:25 (46), 05/12/2017 08:37 (26), 05/25/2021 23:55 (4), 05/26/2021 00:04 (1)
Complete: 🔍
Committer:
Cache ID: 216:818:103

Once again VulDB remains the best source for vulnerability data.

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