MIT Kerberos krb5-appl privilege escalation
| kerberos-krb5appl-priv-esc (68398) |  High Risk |
Description:
MIT Kerberos could allow a remote authenticated attacker to gain elevated privileges on the system, caused by the failure to set effective group ID by the krb5-appl FTP daemon. An attacker could exploit this vulnerability to gain read or write access to files whose group owner is the initial effective group ID (EGID) of the FTP daemon process.
*CVSS:
| Base Score: | 6.5 |
| Access Vector: | Network |
| Access Complexity: | Low |
| Authentication: | Single |
| Confidentiality Impact: | Partial |
| Integrity Impact: | Partial |
| Availability Impact: | Partial |
| Temporal Score: | 5.7 |
| Exploitability: | High |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Gain Privileges
Remedy:
Refer to MITKRB5-SA-2011-005 for patch, upgrade or suggested workaround information. See References.
References:
- MITKRB5-SA-2011-005: FTP daemon fails to set effective group ID.
- BID-48571: MIT Kerberos krb5-appl FTP Daemon EGID Remote Privilege Escalation Vulnerability
- CVE-2011-1526: ftpd.c in the GSS-API FTP daemon in MIT Kerberos Version 5 Applications (aka krb5-appl) 1.0.1 and earlier does not check the krb5_setegid return value, which allows remote authenticated users to bypass intended group access restrictions, and create, overwrite, delete, or read files, via standard FTP commands, related to missing autoconf tests in a configure script.
- DSA-2283: krb5-appl -- programming error
- OSVDB ID: 73617: MIT Kerberos 5 Applications GSS-API FTP Daemon EGID Privilege Matching Restriction Bypass
- RHSA-2011-0920: Important: krb5-appl security update
- RHSA-2012-0306: Low: krb5 security and bug fix update
- SA45145: Kerberos Applications GSS-API FTP Daemon Effective Group ID Privileges Security Issue
Platforms Affected:
- MIT krb5-appl 1.0.1
- RedHat Enterprise Linux 5 Client Workstation
- RedHat Enterprise Linux 5 Client
- RedHat Enterprise Linux 5
- RedHat Enterprise Linux 6 Server
- RedHat Enterprise Linux 6 Workstation
- RedHat Enterprise Linux Desktop 6
- RedHat Enterprise Linux HPC Node 6
- RedHat Enterprise Linux Server EUS 6.1.z
Reported:
Jul 05, 2011
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.