Hashcash array_push() function buffer overflow
| hashcash-arraypush-bo (27422) |  High Risk |
Description:
Hashcash is vulnerable to a heap-based buffer overflow, caused by improper bounds checking by the array_push() function in hashcash.c. By sending a large number of malicious '-r' or '-j' commands or sending resource names to be run with the '-m' option, a remote attacker could overflow a buffer and execute arbitrary code on the system with the privileges of the victim.
Consequences:
Gain Access
Remedy:
Upgrade to the latest version of Hashcash (1.21 or later), available from the Hashcash Web site. See Refrerences.
For Gentoo Linux:
Refer to GLSA 200606-25 for patch, upgrade, or suggested workaround information. See References.
For Debian GNU/Linux:
Refer to DSA-1114-1 for patch, upgrade, or suggested workaround information. See References.
For other distributions:
Contact your vendor for patch or upgrade information.
References:
- Hashcash Web site: Hashcash.
- BID-18659: Hashcash Remote Heap Buffer Overflow Vulnerability
- CVE-2006-3251: Heap-based buffer overflow in the array_push function in hashcash.c for Hashcash before 1.21 might allow attackers to execute arbitrary code via crafted entries.
- DSA-1114: hashcash -- buffer overflow
- GLSA-200606-25: Hashcash: Possible heap overflow
- SA20800: Hashcash "array_push" Buffer Overflow Vulnerability
- VUPEN/ADV-2006-2551: Hashcash array_push() Function Entries Handling Remote Buffer Overflow Vulnerability
Platforms Affected:
- Debian Debian Linux 3.1
- Gentoo Linux
- Hashcash Hashcash prior to 1.21
Reported:
Jun 26, 2006
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 the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.
For corrections or additions please email xforce@iss.net