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CVE-2011-3323

19
FAUCET Score

CVE-2011-3323 describes an out-of-bounds memory access vulnerability in the OSPFv3 implementation of Quagga's ospf6d daemon, affecting versions prior to 0.99.19. A remote attacker can exploit this by sending a crafted Link State Update message with an invalid IPv6 prefix length, leading to a denial of service due to a daemon crash. The vulnerability has a CVSS score of 5.0, indicating a medium severity with low attack complexity and no authentication required, resulting in partial availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.99.18CPE matchmatch criteria
cpe:2.3:a:quagga:quagga:*:*:*:*:*:*:*:*
0.95CPE matchmatch criteria
cpe:2.3:a:quagga:quagga:0.95:*:*:*:*:*:*:*
0.96CPE matchmatch criteria
cpe:2.3:a:quagga:quagga:0.96:*:*:*:*:*:*:*
0.96.1CPE matchmatch criteria
cpe:2.3:a:quagga:quagga:0.96.1:*:*:*:*:*:*:*
0.96.2CPE matchmatch criteria
cpe:2.3:a:quagga:quagga:0.96.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.67%
Probability of exploitation in next 30 days
EPSS Percentile
90.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0467 is in the 87th percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: quagga-0:0.98.6-7.el5_8.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: quagga-0:0.99.15-7.el6_3.2
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: quagga

Vendor Advisories (1)

redhatCVE-2011-3323Low

(ospf6d): Stack-based buffer overflow while decoding Link State Update packet with malformed Inter Area Prefix LSA

Sep 26, 2011

References

code.quagga.net
lists.opensuse.org / opensuse-security-announce/2011-09/msg00027.html
lists.opensuse.org / opensuse-security-announce/2011-10/msg00007.html
lists.opensuse.org / opensuse-security-announce/2011-10/msg00010.html
lists.opensuse.org / opensuse-security-announce/2011-12/msg00009.html
rhn.redhat.com / errata/RHSA-2012-1258.html
rhn.redhat.com / errata/RHSA-2012-1259.html
secunia.com / advisories/46139
Vendor Advisory
secunia.com / advisories/46274
secunia.com / advisories/48106
security.gentoo.org / glsa/glsa-201202-02.xml
cert.fi / en/reports/2011/vulnerability539178.html
debian.org / security/2011/dsa-2316
kb.cert.org / vuls/id/668534
US Government Resource
quagga.net / download/quagga-0.99.19.changelog.txt