MEDIUM
fcgi: numerous connections cause segfault DoS
Published Feb 19, 2015
5.0
MEDIUMCVSS 2.0
EPSS 6.09%
Description
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.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
6.09% 0.06086
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.06086
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 6.09% (0.06086) | 93.19th | v5 (v2026.06.15) |
| Jun 15, 2026 | 6.09% (0.06086) | 92.46th | v5 (v2026.06.15) |
| Aug 11, 2025 | 25.51% (0.25510) | 95.99th | v4 (v2025.03.14) |
| Jun 15, 2025 | 20.12% (0.20116) | 95.17th | v4 (v2025.03.14) |
| Mar 30, 2025 | 25.41% (0.25405) | 95.76th | v4 (v2025.03.14) |
| Mar 29, 2025 | 50.57% (0.50566) | 96.85th | v4 (v2025.03.14) |
| Mar 17, 2025 | 25.41% (0.25405) | 95.76th | v4 (v2025.03.14) |
| Dec 12, 2024 | 2.38% (0.02380) | 90.25th | v3 (v2023.03.01) |
| May 8, 2023 | 2.67% (0.02671) | 88.81th | v3 (v2023.03.01) |
| Mar 21, 2023 | 3.31% (0.03313) | 89.80th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.80% (0.02804) | 89.02th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.32% (0.01319) | 44.98th | v2 (v2022.01.01) |
Weaknesses (1)
References (11)
- http://advisories.mageia.org/MGASA-2015-0184.html x_refsource_CONFIRM
- http://www.openwall.com/lists/oss-security/2015/02/06/4 mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2015/02/07/4 mailing-listx_refsource_MLIST
- https://access.redhat.com/security/cve/CVE-2012-6687 Vendor Advisory
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=681591 x_refsource_CONFIRM
- https://bugs.launchpad.net/ubuntu/+source/libfcgi/+bug/933417 x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=1189958 x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=1190294 Issue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/100696 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2012-6687
- https://www.cve.org/CVERecord?id=CVE-2012-6687
| Link | Providers | Tags |
|---|---|---|
| http://advisories.mageia.org/MGASA-2015-0184.html | x_refsource_CONFIRM | |
| http://www.openwall.com/lists/oss-security/2015/02/06/4 | mailing-listx_refsource_MLIST | |
| http://www.openwall.com/lists/oss-security/2015/02/07/4 | mailing-listx_refsource_MLIST | |
| https://access.redhat.com/security/cve/CVE-2012-6687 | Vendor Advisory | |
| https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=681591 | x_refsource_CONFIRM | |
| https://bugs.launchpad.net/ubuntu/+source/libfcgi/+bug/933417 | x_refsource_CONFIRM | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1189958 | x_refsource_CONFIRM | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1190294 | Issue Tracking | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/100696 | vdb-entryx_refsource_XF | |
| https://nvd.nist.gov/vuln/detail/CVE-2012-6687 | ||
| https://www.cve.org/CVERecord?id=CVE-2012-6687 |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Feb 19, 2015
Updated Aug 6, 2024
Reserved Feb 7, 2015
Link CVE-2012-6687
CISA Vulnrichment
Updated n/a