CVE-2008-3906
CRLF injection vulnerability in Sys.Web in Mono 2.0 and earlier allows remote attackers to inject arbitrary HTTP headers and conduct HTTP…
- 4.3MediumCVSS base score
- 7.1%Exploitation in 30 daysEPSS · top 5.7% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 1Public exploitsMetasploit, Nuclei and Exploit-DB
Description
CRLF injection vulnerability in Sys.Web in Mono 2.0 and earlier allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via CRLF sequences in the query string.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list an Exploit-DB entry for it.
Show the exploits1
Exploit-DB1 entry
- Mono 2.0 - 'System.Web' HTTP Header Injection (Exploit-DB entry) (opens in a new tab)
EDB-ID 32303remote, linuxpublished 20 Aug 2008Verified
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By mitre
Published
- 16 years later
· 16 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
- EPSS (exploitation in 30 days)
- 7.1% · top 5.7% of all CVEs (9 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.
Affected products
n/a
- affected n/a
References
11
- 30867 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- mono-sysweb-xss(44740) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 36494 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- [oss-security] 20080827 CVE request: mono Sys.Web header injection (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- ADV-2008-2443 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 20080930 rPSA-2008-0286-1 mono (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0286 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://bugzilla.novell.com/show_bug.cgi?id=418620 (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-826-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 31643 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- MDVSA-2008:210 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2008-3892 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2008-3906)Record last updated .