CVE-2013-5476: Input Validation
First published: Fri Sep 27 2013(Updated: )
The Zone-Based Firewall (ZFW) feature in Cisco IOS 15.1 through 15.2, when content filtering or HTTP ALG inspection is enabled, allows remote attackers to cause a denial of service (device reload or hang) via crafted IPv4 HTTP traffic, aka Bug ID CSCtx56174.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Puppet Cisco IOS | =15.1 | |
| Puppet Cisco IOS | =15.2 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2013-5476?
CVE-2013-5476 has a high severity rating, as it can lead to denial of service via crafted IPv4 HTTP traffic.
How do I fix CVE-2013-5476?
To mitigate CVE-2013-5476, upgrade to a fixed version of Cisco IOS that is not affected by this vulnerability.
What types of devices are affected by CVE-2013-5476?
CVE-2013-5476 affects Cisco IOS versions 15.1 and 15.2 when HTTP ALG inspection or content filtering is enabled.
What attack vector is used in CVE-2013-5476?
CVE-2013-5476 can be exploited by remote attackers using specially crafted IPv4 HTTP traffic.
Is there a workaround for CVE-2013-5476?
Disabling content filtering or HTTP ALG inspection on affected Cisco IOS devices can serve as a temporary workaround for CVE-2013-5476.
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