Description
The pserver_shutdown function in fence_egenera in cman 2.20080629 and 2.20080801 allows local users to overwrite arbitrary files via a symlink attack on the /tmp/eglog temporary file.
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.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | cman +1 | 2.0.115-34.el5 | RHBA-2010:0266 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Cluster 4 | fence | 1.32.68-5.el4 | RHSA-2011:0266 |
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
- Adobe Flash Player - AVM Verification Logic Array Indexing Code Execution (Metasploit) EDB-19295 · remote · Jun 20, 2012 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 2
- RHSA-2011:0266 Red Hat Security Advisory: fence security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHBA-2010:0266 Red Hat Bug Fix Advisory: cman bug fix and enhancement update Red Hat Security Advisories (RHSA) · Jun 26, 2026
References
- 30898 vdb-entry
- 32390 third-party-advisory
- [oss-security] 20081030 CVE requests: tempfile issues for aview, mgetty, openoffice, crossfire mailing-list
- http://dev.gentoo.org/~rbu/security/debiantemp/cman
- 32387 third-party-advisory
- https://bugs.gentoo.org/show_bug.cgi?id=235770
- 31887 third-party-advisory
- http://uvw.ru/report.lenny.txt
- cman-fenceegenera-symlink(44845) vdb-entry
- ADV-2011-0419 vdb-entry
- USN-875-1 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=460476
- [oss-security] 20080918 CVE Request (openswan, emacspeak, cman) mailing-list
- [oss-security] 20080923 Re: CVE Request (openswan, emacspeak, cman) mailing-list
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=496410
- FEDORA-2008-9042 vendor-advisory
- 43362 third-party-advisory
- RHSA-2011:0266 vendor-advisory