CVE-2009-2629
HighExploitedPublic exploitBuffer underflow in src/http/ngx_http_parse.c in nginx 0.1.0 through 0.5.37, 0.6.x before 0.6.39, 0.7.x before 0.7.62, and 0.8.x before 0.8.15 allows remote attackers to execute arbitrary code via crafted HTTP requests.
Published Sep 15, 2009 · Updated Aug 4, 2026 · Also known as DEBIAN-CVE-2009-2629, DSA-1884-1
Key Facts
Patch immediately- CVE-2009-2629 is a high-severity vulnerability (CVSS 7.5 v2) affecting Nginx (F5), Debian Linux, Fedora (Fedoraproject) and 1 more product.
- It is exploited in the wild, listed in Industry KEV feed since Apr 19, 2011. Public exploit code is available.
- EPSS estimates a 75% probability of exploitation in the next 30 days.
- Fixed versions are available, including Nginx 0.5.38, Nginx 0.4.13-2+etch2, Nginx 0.6.32-3+lenny2.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v2
7.5
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS (30-day exploit likelihood)
75%
Higher than 99.5% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2009-2629 brief as a PDF
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Description
Buffer underflow in src/http/ngx_http_parse.c in nginx 0.1.0 through 0.5.37, 0.6.x before 0.6.39, 0.7.x before 0.7.62, and 0.8.x before 0.8.15 allows remote attackers to execute arbitrary code via crafted HTTP requests.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Apr 19, 2011 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
19 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| NginxF5 | See advisory | 0.5.38 |
| Debian LinuxDebian | 4.0, 5.0, 6.0 | n/a |
| FedoraFedoraproject | 10, 11, 12 | n/a |
| rootio-nginxrootio | See advisory | 0.7.61-3 |
Patched Releases
Nginx
0.5.38, 0.4.13-2+etch2, 0.6.32-3+lenny2, 0.7.61-3
rootio-nginx
0.7.61-3
Timeline
Publicly disclosed
Sep 15, 2009
Added to Industry KEV feed
Apr 19, 2011
Last updated
Aug 4, 2026
Weakness Type
- CWE-787 Out-of-bounds Write
References
- advisoryhttp://nginx.net/CHANGES
- advisoryhttp://nginx.net/CHANGES-0.5
- advisoryhttp://nginx.net/CHANGES-0.6
- advisoryhttp://nginx.net/CHANGES-0.7
- advisoryhttps://security-tracker.debian.org/tracker/CVE-2009-2629
FAQ
Common Questions.
Buffer underflow in src/http/ngx_http_parse.c in nginx 0.1.0 through 0.5.37, 0.6.x before 0.6.39, 0.7.x before 0.7.62, and 0.8.x before 0.8.15 allows remote attackers to execute arbitrary code via crafted HTTP requests.
Affected: Nginx (F5); Debian Linux versions 4.0, 5.0, 6.0; Fedora (Fedoraproject) versions 10, 11, 12, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Apr 19, 2011.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Nginx 0.5.38, Nginx 0.4.13-2+etch2, Nginx 0.6.32-3+lenny2.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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