Vulnerability Monitor

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CVE-2013-5557

The Proxy Bypass Content Rewriter feature in the WebVPN subsystem in Cisco Adaptive Security Appliance (ASA) Software 9.1(.2) and earlier allows remote authenticated users to cause a denial of service (device crash or error-recovery event) via an HTTP request that triggers a rewrite, aka Bug ID CSCug91577.

Security Impact Summary

CVE-2013-5557 is a security vulnerability that . Impacting 1 product from cisco organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2015, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2015-02-07T04:59:00.047

Last Modified

2025-04-12T10:46:40.837

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 6.3 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:S/C:N/I:N/A:C

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: SINGLE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: COMPLETE

Exploitability Score

6.8

Impact Score

6.9

Weaknesses

Type: Primary
NVD-CWE-noinfo

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	cisco	adaptive_security_appliance_software	≤ 9.1\(2\)	Yes

References

http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-5557 Broken Link, Vendor Advisory ([email protected])
http://tools.cisco.com/security/center/viewAlert.x?alertId=37383 Vendor Advisory ([email protected])
http://www.securityfocus.com/bid/72529 Third Party Advisory, VDB Entry ([email protected])
https://exchange.xforce.ibmcloud.com/vulnerabilities/100694 Third Party Advisory, VDB Entry ([email protected])
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-5557 Broken Link, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://tools.cisco.com/security/center/viewAlert.x?alertId=37383 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/72529 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://exchange.xforce.ibmcloud.com/vulnerabilities/100694 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.