CVE-2013-5543: Input Validation
First published: Thu Oct 31 2013(Updated: )
Cisco IOS XE 3.4 before 3.4.2S and 3.5 before 3.5.1S on 1000 ASR devices allows remote attackers to cause a denial of service (device reload) via malformed ICMP error packets associated with a (1) TCP or (2) UDP session that is under inspection by the Zone-Based Firewall (ZBFW) component, aka Bug ID CSCtt26470.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS XE Software | =3.4.0as | |
| Cisco IOS XE Software | =3.4.0s | |
| Cisco IOS XE Software | =3.4.1s | |
| Cisco ASR 1001 | ||
| Cisco ASR 1002 Fixed Router | ||
| Cisco ASR 1002-X | ||
| Cisco ASR 1004 | ||
| Cisco ASR 1006 | ||
| Cisco ASR 1023 Router |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2013-5543?
CVE-2013-5543 has a severity rating that can lead to a denial of service affecting Cisco ASR devices.
How do I fix CVE-2013-5543?
To fix CVE-2013-5543, update your Cisco IOS XE software to version 3.4.2S or 3.5.1S or later.
What devices are affected by CVE-2013-5543?
CVE-2013-5543 affects various ASR 1000 series routers running earlier versions of Cisco IOS XE.
What type of attack does CVE-2013-5543 enable?
CVE-2013-5543 enables remote attackers to cause a denial of service by sending malformed ICMP error packets.
Is there a mitigation for CVE-2013-5543?
There is no mitigation for CVE-2013-5543 other than upgrading to the patched Cisco IOS XE versions.
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- vendor/cisco
- canonical/cisco ios xe software
- version/cisco ios xe software/3.4.0as
- version/cisco ios xe software/3.4.0s
- version/cisco ios xe software/3.4.1s
- canonical/cisco asr 1001
- canonical/cisco asr 1002 fixed router
- canonical/cisco asr 1002-x
- canonical/cisco asr 1004
- canonical/cisco asr 1006
- canonical/cisco asr 1023 router