CVE-2012-6687 json
FastCGI (aka fcgi and libfcgi) 2.4.0 allows remote attackers to cause a denial of service (segmentation fault and crash) via a large number…
published 2015-02-19 11 y ago modified 2026-06-16 4 mo ago also EUVD-2012-6529
- cvss
- 5.0
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 6.1%
- EPSS 6.1% chance of exploitation in 30 days, percentile 93%
- public exploits
- 0
- none known
Summary
FastCGI (aka fcgi and libfcgi) 2.4.0 allows remote attackers to cause a denial of service (segmentation fault and crash) via a large number of connections.
Patch / fix
- libfcgi Debian 14, Debian 13, Debian 12 2.4.0-8.3
- libfcgi-perl Debian 14, Debian 13, Debian 12 0.78-2
debian advisories DEBIAN-CVE-2012-6687
- fcgi CBL-Mariner 2.0, Azure Linux 3.0 2.4.0-7
azure linux advisories AZL-34685AZL-6418
Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2012-6687 updated cvss 5.0
fcgi: numerous connections cause segfault DoS
-
Red Hat Ceph Storage 1.2 fcgi Red Hat Ceph Storage 1.3 fcginot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
6.09% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
- bugzilla.redhat.com /show_bug.cgi?id=1189958
- bugs.launchpad.net /ubuntu/+source/libfcgi/+bug/933417
- advisories.mageia.org /MGASA-2015-0184.html
-
openwall.com
/lists/oss-security/2015/02/07/4
mailing-list
-
exchange.xforce.ibmcloud.com
/vulnerabilities/100696
vdb-entry
- bugs.debian.org /cgi-bin/bugreport.cgi?bug=681591
-
openwall.com
/lists/oss-security/2015/02/06/4
mailing-list
Sources
- CVE List CVE-2012-6687
- NVD CVE-2012-6687
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.