GLSA 200507-11: MIT Kerberos 5: Multiple vulnerabilities
| Severity: | high |
| Title: | MIT Kerberos 5: Multiple vulnerabilities |
| Date: | 07/12/2005 |
| Bugs: | |
| ID: | 200507-11 |
Synopsis
MIT Kerberos 5 is vulnerable to a Denial of Service attack and remote execution of arbitrary code, possibly leading to the compromise of the entire Kerberos realm.Background
MIT Kerberos 5 is the free implementation of the Kerberos network authentication protocol by the Massachusetts Institute of Technology.
Affected packages
| Package | Vulnerable | Unaffected | Architecture(s) |
|---|---|---|---|
| app-crypt/mit-krb5 | < 1.4.1-r1 | >= 1.4.1-r1 | All supported architectures |
Description
Daniel Wachdorf discovered that MIT Kerberos 5 could corrupt the heap by freeing unallocated memory when receiving a special TCP request (CAN-2005-1174). He also discovered that the same request could lead to a single-byte heap overflow (CAN-2005-1175). Magnus Hagander discovered that krb5_recvauth() function of MIT Kerberos 5 might try to double-free memory (CAN-2005-1689).
Impact
Although exploitation is considered difficult, a remote attacker could exploit the single-byte heap overflow and the double-free vulnerability to execute arbitrary code, which could lead to the compromise of the whole Kerberos realm. A remote attacker could also use the heap corruption to cause a Denial of Service.
Workaround
There are no known workarounds at this time.
Resolution
All MIT Kerberos 5 users should upgrade to the latest available version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-crypt/mit-krb5-1.4.1-r1"
References
Availability
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
Concerns?
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.
License
Copyright 2010 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.