pam_krb5: Privilege escalation
1.
Gentoo Linux Security Advisory
Version Information
| Advisory Reference |
GLSA 200903-39 / pam_krb5 |
| Release Date |
March 25, 2009 |
| Latest Revision |
March 25, 2009: 01 |
| Impact |
high |
| Exploitable |
local |
| Package |
Vulnerable versions |
Unaffected versions |
Architecture(s) |
| sys-auth/pam_krb5 |
<
3.12 |
>=
3.12 |
All supported architectures
|
Related bugreports:
#257075
Synopsis
Two vulnerabilities in pam_krb5 might allow local users to elevate their
privileges or overwrite arbitrary files.
2.
Impact Information
Background
pam_krb5 is a a Kerberos v5 PAM module.
Description
The following vulnerabilities were discovered:
- pam_krb5
does not properly initialize the Kerberos libraries for setuid use
(CVE-2009-0360).
- Derek Chan reported that calls to
pam_setcred() are not properly handled when running setuid
(CVE-2009-0361).
Impact
A local attacker could set an environment variable to point to a
specially crafted Kerberos configuration file and launch a PAM-based
setuid application to elevate privileges, or change ownership and
overwrite arbitrary files.
3.
Resolution Information
Workaround
There is no known workaround at this time.
Resolution
All pam_krb5 users should upgrade to the latest version:
Code Listing 3.1: Resolution |
# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-auth/pam_krb5-3.12"
|
4.
References
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