Expreserve allows local users to overwrite arbitrary files
| expreserve (401) |  High Risk |
Description:
Expreserve has a race condition that allowed attackers to overwrite any file on the system.
Consequences:
File Manipulation
Remedy:
For HP-UX:
Apply the appropriate patch for your system, as listed in Hewlett-Packard Security Bulletin HPSBUX9607-033. See References.
For SunOS:
Apply the appropriate patch for your system, as listed in CERT Security Advisory CA-1996-19. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
As a workaround, strip the suid bit from the expreserve executable; expreserve is capable of running with limited permissions.
References:
- CERT Advisory CA-1996-19: Vulnerability in expreserve.
- Hewlett-Packard Company Security Bulletin HPSBUX9607-033: Security Vulnerability in expreserve. (From SecurityFocus archive.)
- SGI Security Advisory 19960802-01-I: Vulnerability in expreserve.
- CVE-1999-0132: Expreserve, as used in vi and ex, allows local users to overwrite arbitrary files and gain root access.
Platforms Affected:
- HP HP-UX 10.00
- HP HP-UX 10.01
- HP HP-UX 10.10
- HP HP-UX 10.20
- HP HP-UX 9.00
- HP HP-UX 9.01
- HP HP-UX 9.03
- HP HP-UX 9.04
- HP HP-UX 9.05
- HP HP-UX 9.06
- HP HP-UX 9.07
- HP HP-UX 9.08
- HP HP-UX 9.09
- HP HP-UX 9.10
Reported:
Jun 01, 1993
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