CVE-2012-5521

Name: CVE-2012-5521
Creator: NVD / NIST
Published: 2019-11-25T14:15:11.147+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.49%

Last modified Jun 16, 2026

CVE-2012-5521 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. quagga (ospf6d) 0.99.21 has a DoS flaw in the way the ospf6d daemon performs routes removal. EPSS estimates a 1.49% chance of exploitation in the next 30 days.

Description

quagga (ospf6d) 0.99.21 has a DoS flaw in the way the ospf6d daemon performs routes removal

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.49%

70.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-617

Affected Software

Vendor	Product	Versions
Quagga	Quagga	0.99.21
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0
Redhat	Enterprise Linux	5.0
Redhat	Enterprise Linux	6.0

References

http://www.openwall.com/lists/oss-security/2012/11/13/14Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/56530Third Party Advisory, VDB Entry
https://access.redhat.com/security/cve/cve-2012-5521Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2012-5521Issue Tracking, Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=CVE-2012-5521Issue Tracking, Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/80096Third Party Advisory, VDB Entry
https://security-tracker.debian.org/tracker/CVE-2012-5521Third Party Advisory
http://www.openwall.com/lists/oss-security/2012/11/13/14Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/56530Third Party Advisory, VDB Entry
https://access.redhat.com/security/cve/cve-2012-5521Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2012-5521Issue Tracking, Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=CVE-2012-5521Issue Tracking, Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/80096Third Party Advisory, VDB Entry
https://security-tracker.debian.org/tracker/CVE-2012-5521Third Party Advisory

Timeline

Published: Nov 25, 2019
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2012-5521?

quagga (ospf6d) 0.99.21 has a DoS flaw in the way the ospf6d daemon performs routes removal

How severe is CVE-2012-5521?

CVE-2012-5521 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.49% probability of exploitation in the next 30 days.

How do I fix CVE-2012-5521?

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-2012-5521?

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

Scan your code now

Source: NVD / NIST