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7.1

Cisco IOS/IOS XE RSVP can crash device

CVE-2013-1143 · published 13 years ago
Summary

Cisco IOS and IOS XE versions that support MPLS traffic engineering have a flaw in the RSVP handling code. An attacker who can send specially crafted RSVP packets could cause the router to access memory incorrectly and restart, leading to a denial of service. Update the software to the latest released version that fixes this issue.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
cisco ios 12.2
15.0
15.0\(1\)se
15.1
15.2
15.3
cpe:2.3:o:cisco:ios:12.2:*:*:*:*:*:*:*
cisco ios_xe 3.1.0s
3.1.1s
3.1.2s
3.1.3s
3.1.4s
3.2.0s
3.2.1s
3.2.2s
3.3.0s
3.3.1s
3.3.2s
3.3.3s
7 more version ranges
cpe:2.3:o:cisco:ios_xe:3.1.0s:*:*:*:*:*:*:*
Original advisory text
The RSVP protocol implementation in Cisco IOS 12.2 and 15.0 through 15.2 and IOS XE 3.1.xS through 3.4.xS before 3.4.5S and 3.5.xS through 3.7.xS before 3.7.2S, when MPLS-TE is enabled, allows remo...
The RSVP protocol implementation in Cisco IOS 12.2 and 15.0 through 15.2 and IOS XE 3.1.xS through 3.4.xS before 3.4.5S and 3.5.xS through 3.7.xS before 3.7.2S, when MPLS-TE is enabled, allows remote attackers to cause a denial of service (incorrect memory access and device reload) via a traffic engineering PATH message in an RSVP packet, aka Bug ID CSCtg39957.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker partial control (estimated)
Severity
7.1 High
Exploitation
1% chance of attack within 30 days
Type
CWE-119Buffer Overflow
Timeline
Published28 Mar 2013
Updated4 Nov 2026
First seen29 Sep 2026
Sources
CVE-2013-1143 · NVD
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