at(1) program on many systems contains an exploitable buffer overflow
| at-bo (447) |  High Risk |
Description:
The "at" program is vulnerable to a buffer overflow. An attacker can overflow a buffer and execute arbitrary commands on the system as root.
Platforms Affected:
- HP, HP-UX
- IBM, AIX
- NCR, NCR MP-RAS
- SCO, SCO Unix
- SGI, IRIX
- Sun, Solaris
- Sun, SunOS
Remedy:
Administrators should disable the "at" command (use crontab if you still need this functionality) until you can obtain a patch from your vendor. Detailed patch information can be found in CERT Advisory CA-97.18. See References.
For SunOS 5.3, 5.4, 5.5, and 5.5.1:
Apply the appropriate patch for your system, as listed in Sun Microsystems, Inc. Security Bulletin #00160. See References.
For HP-UX:
Apply the appropriate patch for your system, as listed in Hewlett-Packard Security Bulletin HPSBUX9502-023. See References.
For Silicon Graphics:
Apply the appropriate patch for your system, as listed in Silicon Graphics Inc. Security Advisory, November 18, 1997. See References.
For IBM AIX 3.2:
Apply APAR IX60796 patch, as listed in CERT Advisory CA-1997-18. See References.
For IBM AIX 4.1:
Apply the appropriate patch for your system, as listed in CERT Advisory CA-1997-18. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
Consequences:
Gain Privileges
References:
- CERT Advisory CA-1997-18, Vulnerability in the at(1) program at http://www.cert.org/advisories/CA-1997-18.html.
- Hewlett-Packard Company Security Bulletin HPSBUX9502-023, Security vulnerability in `at' & `cron' at http://us-support.external.hp.com.
- SGI Security Advisory 19971102-01-PX, Vulnerability in at(1) program at ftp://patches.sgi.com/support/free/security/advisories/19971102-01-PX.
- Sun Microsystems, Inc. Security Bulletin #00160, at at http://sunsolve.sun.com/pub-cgi/retrieve.pl?doctype=coll&doc=secbull/160&type=0&nav=sec.sba.
- CVE-1999-0033: Command execution in Sun systems via buffer overflow in the at program.
Reported:
Jun 01, 1997
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