MEDIUM
Buffer overflow in the fcgi_env_add function in mod_proxy_backend_fastcgi.c in the mod_fastcgi extension in lighttpd before 1.4.18 allows remote attackers to overwrite arbitrary CGI variables and execute arbitrary code via an HTTP request with a long content length, as demonstrated by overwriting the SCRIPT_FILENAME variable, aka a "header overflow."
Published Sep 12, 2007
6.8
MEDIUMCVSS 2.0
EPSS 12.90%
Description
Buffer overflow in the fcgi_env_add function in mod_proxy_backend_fastcgi.c in the mod_fastcgi extension in lighttpd before 1.4.18 allows remote attackers to overwrite arbitrary CGI variables and execute arbitrary code via an HTTP request with a long content length, as demonstrated by overwriting the SCRIPT_FILENAME variable, aka a "header overflow."
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.
6.8 MEDIUM NVD
AV:N/AC:M/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
12.90% 0.12895
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.12895
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 (21 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 12.90% (0.12895) | 96.19th | v5 (v2026.06.15) |
| Jun 15, 2026 | 12.90% (0.12895) | 95.79th | v5 (v2026.06.15) |
| Dec 28, 2025 | 17.74% (0.17743) | 94.89th | v4 (v2025.03.14) |
| Dec 27, 2025 | 13.26% (0.13265) | 93.96th | v4 (v2025.03.14) |
| Oct 28, 2025 | 16.84% (0.16843) | 94.66th | v4 (v2025.03.14) |
| Oct 27, 2025 | 12.55% (0.12549) | 93.67th | v4 (v2025.03.14) |
| Oct 7, 2025 | 16.84% (0.16843) | 94.71th | v4 (v2025.03.14) |
| Oct 1, 2025 | 21.05% (0.21054) | 95.48th | v4 (v2025.03.14) |
| Jul 30, 2025 | 12.55% (0.12549) | 93.66th | v4 (v2025.03.14) |
| Mar 30, 2025 | 21.05% (0.21054) | 95.16th | v4 (v2025.03.14) |
| Mar 29, 2025 | 28.29% (0.28285) | 94.44th | v4 (v2025.03.14) |
| Mar 17, 2025 | 21.05% (0.21054) | 95.17th | v4 (v2025.03.14) |
| Dec 17, 2024 | 50.44% (0.50438) | 97.62th | v3 (v2023.03.01) |
| Dec 12, 2024 | 29.40% (0.29403) | 97.05th | v3 (v2023.03.01) |
| Jun 8, 2024 | 30.20% (0.30196) | 96.95th | v3 (v2023.03.01) |
| May 1, 2024 | 30.61% (0.30609) | 96.91th | v3 (v2023.03.01) |
| Feb 14, 2024 | 30.45% (0.30446) | 96.79th | v3 (v2023.03.01) |
| Mar 7, 2023 | 31.65% (0.31647) | 96.26th | v3 (v2023.03.01) |
| Mar 6, 2023 | 12.25% (0.12248) | 95.30th | v2 (v2022.01.01) |
| Apr 1, 2022 | 12.25% (0.12248) | 94.93th | v2 (v2022.01.01) |
| Feb 4, 2022 | 12.25% (0.12248) | 89.34th | v2 (v2022.01.01) |
Weaknesses (1)
References (18)
- http://fedoranews.org/updates/FEDORA-2007-213.shtml vendor-advisoryx_refsource_FEDORA
- http://secunia.com/advisories/26732 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/26794 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/26824 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/26997 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/27229 third-party-advisoryx_refsource_SECUNIA
- http://securityreason.com/securityalert/3127 third-party-advisoryx_refsource_SREASON
- http://secweb.se/en/advisories/lighttpd-fastcgi-remote-vulnerability/ x_refsource_MISC
- http://trac.lighttpd.net/trac/changeset/1986 x_refsource_CONFIRM
- http://www.gentoo.org/security/en/glsa/glsa-200709-16.xml vendor-advisoryx_refsource_GENTOO
- http://www.lighttpd.net/assets/2007/9/9/lighttpd_sa_2007_12.txt x_refsource_CONFIRM
- http://www.novell.com/linux/security/advisories/2007_20_sr.html vendor-advisoryx_refsource_SUSE
- http://www.securityfocus.com/archive/1/479763/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/bid/25622 vdb-entryx_refsource_BID
- http://www.vupen.com/english/advisories/2007/3110 vdb-entryx_refsource_VUPEN
- https://bugzilla.redhat.com/show_bug.cgi?id=284511 x_refsource_MISC
- https://exchange.xforce.ibmcloud.com/vulnerabilities/36526 vdb-entryx_refsource_XF
- https://issues.rpath.com/browse/RPL-1715 x_refsource_CONFIRM
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Sep 12, 2007
Updated Aug 7, 2024
Reserved Sep 5, 2007
Link CVE-2007-4727
CISA Vulnrichment
Updated n/a