Cisco IOS up to 15.3 VFR race condition

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

Summaryinfo

A vulnerability has been found in Cisco IOS up to 15.3 and classified as problematic. The affected element is an unknown function of the component VFR Handler. This manipulation causes race condition. The identification of this vulnerability is CVE-2013-5474. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Cisco IOS up to 15.3 (Router Operating System) and classified as problematic. Affected by this vulnerability is an unknown part of the component VFR Handler. The manipulation with an unknown input leads to a race condition vulnerability. The CWE definition for the vulnerability is CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. As an impact it is known to affect availability. The summary by CVE is:

Race condition in the IPv6 virtual fragmentation reassembly (VFR) implementation in Cisco IOS 12.2 through 12.4 and 15.0 through 15.3 allows remote attackers to cause a denial of service (device reload or hang) via fragmented IPv6 packets, aka Bug ID CSCud64812.

The weakness was shared 09/25/2013 as cisco-sa-20130925-ipv6vfr as confirmed advisory (Website). The advisory is shared at tools.cisco.com. The vendor cooperated in the coordination of the public release. This vulnerability is known as CVE-2013-5474 since 08/22/2013. The exploitation appears to be difficult. 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 70319 (Cisco IOS Software IPv6 Virtual Fragmentation Reassembly Denial of Service Vulnerability (cisco-sa-20130925-ipv6vfr)), 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 43322 (Cisco IOS Software IPv6 Virtual Fragmentation Reassembly Denial of Service Vulnerability (cisco-sa-20130925-ipv6vfr)).

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 (70319), SecurityFocus (BID 62638†), OSVDB (97737†) and Vulnerability Center (SBV-41624†). The entries VDB-10493, VDB-10492, VDB-10491 and VDB-10490 are related to this item. Several companies clearly confirm that VulDB is the primary source for best 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: 🔍
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Exploitinginfo

Class: Race condition
CWE: CWE-362
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: 70319
Nessus Name: Cisco IOS Software IPv6 Virtual Fragmentation Reassembly Denial of Service Vulnerability (cisco-sa-20130925-ipv6vfr)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

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 🔍
10/07/2013 +8 days 🔍
12/24/2024 +4096 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20130925-ipv6vfr
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2013-5474 (🔍)
GCVE (CVE): GCVE-0-2013-5474
GCVE (VulDB): GCVE-100-10489

IAVM: 🔍

SecurityFocus: 62638
OSVDB: 97737
Vulnerability Center: 41624 - [cisco-sa-20130925-ipv6vfr] Cisco IOS 12.2-12.4, 15.0-15.3 Remote DoS via Fragmented IPv6 Packets Vulnerability - CVE-2013-5474, High

See also: 🔍

Entryinfo

Created: 09/26/2013 19:17
Updated: 12/24/2024 16:49
Changes: 09/26/2013 19:17 (46), 05/12/2017 08:35 (26), 05/25/2021 23:00 (4), 05/25/2021 23:15 (1), 12/24/2024 16:49 (16)
Complete: 🔍
Committer:
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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