Description
MHonArc 2.6.16 allows remote attackers to cause a denial of service (CPU consumption) via start tags that are placed within other start tags, as demonstrated by a <bo<bo<bo<bo<body>dy>dy>dy>dy> sequence, a different vulnerability than CVE-2010-4524.
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 | mhonarc | 2.6.18-1 | — |
| Debian 13 | mhonarc | 2.6.18-1 | — |
| Debian 12 | mhonarc | 2.6.18-1 | — |
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
- MHonArc 2.6.16 - Tag Nesting Remote Denial of Service EDB-35478 · dos · Dec 21, 2010 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- mhonarc-start-tags-dos(64656) vdb-entry
- ADV-2010-3344 vdb-entry
- [mhonarc-dev] 20101230 [bug #32014] CVE-2010-1677: DoS when processing html messages with deep tag nesting mailing-list
- ADV-2011-0067 vdb-entry
- 42694 third-party-advisory
- http://savannah.nongnu.org/bugs/?32014
- MDVSA-2011:003 vendor-advisory