Cisco ASA up to 9.1(1.3) Clientless SSL VPN HTTPS Request memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability has been found in Cisco ASA up to 9.1(1.3) and classified as problematic. This impacts an unknown function of the component Clientless SSL VPN. This manipulation as part of HTTPS Request causes memory corruption. This vulnerability is tracked as CVE-2013-5515. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical was found in Cisco ASA up to 9.1(1.3) (Firewall Software). Affected by this vulnerability is an unknown part of the component Clientless SSL VPN. The manipulation as part of a HTTPS Request leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect availability. The summary by CVE is:

The Clientless SSL VPN feature in Cisco Adaptive Security Appliance (ASA) Software 8.x before 8.2(5.44), 8.3.x before 8.3(2.39), 8.4.x before 8.4(5.7), 8.6.x before 8.6(1.12), 9.0.x before 9.0(2.6), and 9.1.x before 9.1(1.7) allows remote attackers to cause a denial of service (device reload) via crafted HTTPS requests, aka Bug ID CSCua22709.

The weakness was disclosed 10/09/2013 as cisco-sa-20131009-asa as confirmed advisory (Website). The advisory is shared at tools.cisco.com. This vulnerability is known as CVE-2013-5515 since 08/22/2013. 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 70474 (Cisco ASA Software Multiple Vulnerabilities (cisco-sa-20131009-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 43394 (Cisco ASA Multiple Vulnerabilities (cisco-sa-20131009-asa)).

Upgrading to version 8.2(5.44), 8.3(2.39), 8.4(5.7), 8.6(1.12), 9.0(2.6) or 9.1(1.7) 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 X-Force (87779), Tenable (70474), OSVDB (98258†), Secunia (SA55237†) and Vulnerability Center (SBV-41865†). Additional details are provided at seclists.org. The entries VDB-10654, VDB-10656, VDB-10658 and VDB-10659 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

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CVSSv4info

VulDB Vector: 🔍
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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: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
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: 70474
Nessus Name: Cisco ASA Software Multiple Vulnerabilities (cisco-sa-20131009-asa)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: ASA 8.2(5.44)/8.3(2.39)/8.4(5.7)/8.6(1.12)/9.0(2.6)/9.1(1.7)

Timelineinfo

08/22/2013 🔍
10/09/2013 +48 days 🔍
10/09/2013 +0 days 🔍
10/09/2013 +0 days 🔍
10/10/2013 +1 days 🔍
10/13/2013 +3 days 🔍
10/13/2013 +0 days 🔍
10/14/2013 +1 days 🔍
05/26/2021 +2781 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20131009-asa
Status: Confirmed

CVE: CVE-2013-5515 (🔍)
GCVE (CVE): GCVE-0-2013-5515
GCVE (VulDB): GCVE-100-10657

IAVM: 🔍

X-Force: 87779
Secunia: 55237 - Cisco Adaptive Security Appliance (ASA) Multiple Vulnerabilities, Moderately Critical
OSVDB: 98258
Vulnerability Center: 41865 - [cisco-sa-20131009-asa] Cisco ASA Remote Denial of Service due to Improper Handling of Maliciously Crafted HTTPS Requests (CVE-2013-5515), High

Misc.: 🔍
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Entryinfo

Created: 10/14/2013 16:52
Updated: 05/26/2021 15:10
Changes: 10/14/2013 16:52 (77), 05/13/2017 09:45 (1), 05/26/2021 15:10 (3)
Complete: 🔍
Cache ID: 216::103

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

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