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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | mono | 1.9.1+dfsg-4 | — |
| Debian 13 | mono | 1.9.1+dfsg-4 | — |
| Debian 12 | mono | 1.9.1+dfsg-4 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Mono 2.0 - 'System.Web' HTTP Header Injection EDB-32303 · remote · Aug 20, 2008 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- 30867 vdb-entry
- mono-sysweb-xss(44740) vdb-entry
- 36494 third-party-advisory
- [oss-security] 20080827 CVE request: mono Sys.Web header injection mailing-list
- ADV-2008-2443 vdb-entry
- 20080930 rPSA-2008-0286-1 mono mailing-list
- http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0286
- https://bugzilla.novell.com/show_bug.cgi?id=418620
- USN-826-1 vendor-advisory
- 31643 third-party-advisory
- MDVSA-2008:210 vendor-advisory