IBM AIX Bellmail Race Condition Vulnerability
BID:8805
Info
IBM AIX Bellmail Race Condition Vulnerability
| Bugtraq ID: | 8805 |
| Class: | Race Condition Error |
| CVE: | |
| Remote: | No |
| Local: | Yes |
| Published: | Nov 20 2001 12:00AM |
| Updated: | Nov 20 2001 12:00AM |
| Credit: | This vulnerability was disclosed in a vendor advisory. |
| Vulnerable: |
IBM AIX 5.1 |
| Not Vulnerable: | |
Discussion
IBM AIX Bellmail Race Condition Vulnerability
IBM AIX implementation of bellmail has been reported prone to a race condition vulnerability.
The issue has been reported to present itself due to an insecure chown operation performed by bellmail on a temporary file. Although unconfirmed, it has been conjectured that a local attacker may exploit this issue by replacing the affected file, in a crucial timeframe, with a symlink to an arbitrary system file and have bellmail change ownership of the linked file.
IBM AIX implementation of bellmail has been reported prone to a race condition vulnerability.
The issue has been reported to present itself due to an insecure chown operation performed by bellmail on a temporary file. Although unconfirmed, it has been conjectured that a local attacker may exploit this issue by replacing the affected file, in a crucial timeframe, with a symlink to an arbitrary system file and have bellmail change ownership of the linked file.
Exploit / POC
IBM AIX Bellmail Race Condition Vulnerability
Exploit code was provided by watercloud <[email protected]>:
Exploit code was provided by watercloud <[email protected]>:
Solution / Fix
IBM AIX Bellmail Race Condition Vulnerability
Solution:
The vendor has released an APAR (IY25661) to address this issue.
IBM AIX 5.1
Solution:
The vendor has released an APAR (IY25661) to address this issue.
IBM AIX 5.1
References
IBM AIX Bellmail Race Condition Vulnerability
References:
References:
- IY25661: SECURITY: RACE CONDITION VULNERABILITY IN BELLMAIL (IBM)
- x_aix5_bellmail.txt (watercloud)