Cfengine vicf.in, cfmailfilter, and cfcron.in symlink
| cfengine-mulitple-file-symlink (22489) |  Medium Risk |
Description:
Cfengine is vulnerable to a symlink attack. Temporary files in the /tmp directory are created insecurely by the contrib/vicf.in, /bin/cfmailfilter, and /contrib/cfcron.in files. A local attacker could exploit this vulnerability by creating a symbolic link from a temporary file to other files on the system, which would allow the attacker to create or overwrite arbitrary files on the system with the privileges of the victim.
Platforms Affected:
- Canonical, Ubuntu 4.10
- Canonical, Ubuntu 5.04
- Debian, Debian Linux 3.0
- Debian, Debian Linux 3.1
- GNU, Cfengine 1.6.5
- GNU, Cfengine 2.1.16
- MandrakeSoft, Mandrake Linux 10.1 X86_64
- MandrakeSoft, Mandrake Linux 10.1
- MandrakeSoft, Mandrake Linux 2006
- MandrakeSoft, Mandrake Linux 2006 X86_64
- MandrakeSoft, Mandrake Linux LE2005
- MandrakeSoft, Mandrake Linux LE2005 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 2.1 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 2.1
- MandrakeSoft, Mandrake Linux Corporate Server 3.0 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 3.0
Remedy:
For Debian GNU/Linux:
Refer to DSA-836-1 and DSA-835-1 for patch, upgrade, or suggested workaround information. See References.
For Ubuntu Linux:
Refer to USN-198-1 for patch, upgrade, or suggested workaround information. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
Consequences:
File Manipulation
References:
- Cfengine Web site, Cfengine - a configuration engine for Unix and Windows at http://www.cfengine.org/.
- BID-14994: GNU CFEngine Insecure Temporary File Creation Vulnerability
- CVE-2005-2960: cfengine 1.6.5 and 2.1.16 allows local users to overwrite arbitrary files via a symlink attack on temporary files used by vicf.in, a different vulnerability than CVE-2005-3137.
- CVE-2005-3137: The (1) cfmailfilter and (2) cfcron.in files for cfengine 1.6.5 allow local users to overwrite arbitrary files via a symlink attack on temporary files, a different vulnerability than CVE-2005-2960.
- DSA-835: cfengine -- insecure temporary files
- DSA-836: cfengine2 -- insecure temporary files
- MDKSA-2005:184: Updated cfengine packages fix temporary file vulnerabilities
- SA17037: Cfengine Insecure Temporary File Creation Vulnerabilities
- SUSE-SR:2005:023: SUSE Security Summary Report
- USN-198-1: cfengine vulnerabilities
Reported:
Oct 03, 2005
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