CVE-2008-3803

Name: CVE-2008-3803
Creator: NVD / NIST
Published: 2008-09-26T16:21:44.16+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.65%

Last modified Jun 16, 2026

CVE-2008-3803 is a vulnerability of currently unknown severity. A "logic error" in Cisco IOS 12.0 through 12.4, when a Multiprotocol Label Switching (MPLS) VPN with extended communities is configured, sometimes causes a corrupted route target (RT) to be used, which allows remote attackers to read traffic from other VPNs in opportunistic circumstances.. EPSS estimates a 2.65% chance of exploitation in the next 30 days.

Description

A "logic error" in Cisco IOS 12.0 through 12.4, when a Multiprotocol Label Switching (MPLS) VPN with extended communities is configured, sometimes causes a corrupted route target (RT) to be used, which allows remote attackers to read traffic from other VPNs in opportunistic circumstances.

Metrics

EPSS Probability

2.65%

83.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Cisco	Ios	12.0s
Cisco	Ios	12.0sx
Cisco	Ios	12.0sz

References

http://secunia.com/advisories/31990Third Party Advisory
http://www.cisco.com/en/US/products/products_security_advisory09186a0080a014a9.shtmlVendor Advisory
http://www.securityfocus.com/bid/31366Third Party Advisory, VDB Entry
http://www.securitytracker.com/id?1020940Broken Link, Third Party Advisory, VDB Entry
http://www.vupen.com/english/advisories/2008/2670Permissions Required
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5919Third Party Advisory
http://secunia.com/advisories/31990Third Party Advisory
http://www.cisco.com/en/US/products/products_security_advisory09186a0080a014a9.shtmlVendor Advisory
http://www.securityfocus.com/bid/31366Third Party Advisory, VDB Entry
http://www.securitytracker.com/id?1020940Broken Link, Third Party Advisory, VDB Entry
http://www.vupen.com/english/advisories/2008/2670Permissions Required
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5919Third Party Advisory

Timeline

Published: Sep 26, 2008
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2008-3803?

How severe is CVE-2008-3803?

Severity scoring for CVE-2008-3803 is pending analysis. The EPSS model estimates a 2.65% probability of exploitation in the next 30 days.

How do I fix CVE-2008-3803?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2008-3803?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST