LSH heap overflow
| lsh-heap-overflow (13245) |  High Risk |
Description:
LSH is vulnerable to a heap overflow. A remote attacker could exploit this vulnerability to overflow a buffer and execute arbitrary code on the system with root privileges.
Consequences:
Gain Access
Remedy:
For LSH prior to 1.4.3:
Upgrade to the latest version of LSH (1.4.3 or later), available from the LSH Web page. See References.
For LSH prior to 1.5, 1.5.1, and 1.5.2:
Upgrade to the latest version of LSH (1.5.3 or later), available from the LSH Web page. See References.
For SuSE Linux:
Upgrade to the latest lsh package, as listed below. Refer to SuSE Security Announcement SuSE-SA:2003:041 for more information. See References.
SuSE Linux 8.2 (Intel): 1.5-114 or later
SuSE Linux 8.1: 1.4.2-73 or later
SuSE Linux 8.0: 1.3.5-188 or later
For Debian GNU/Linux:
Refer to DSA-717-1 for patch, upgrade, or suggested workaround information. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
References:
- BugTraq Mailing List, Fri Sep 19 2003 - 08:01:24 CDT: Remote root vuln in lsh 1.4.x.
- BugTraq Mailing List, Sat Sep 20 2003 - 03:58:55 CDT: LSH: Buffer overrun and remote root compromise in lshd.
- lsh Web site: LSH - a GNU implementation of the Secure Shells protocols.
- BID-8655: LSH Remote Buffer Overflow Vulnerability
- CVE-2003-0826: lsh daemon (lshd) does not properly return from certain functions in (1) read_line.c, (2) channel_commands.c, or (3) client_keyexchange.c when long input is provided, which could allow remote attackers to execute arbitrary code via a heap-based buffer overflow attack.
- DSA-717: lsh-utils -- buffer overflow
Platforms Affected:
- Debian Debian Linux 3.0
- GNU LSH 1.4
- GNU LSH 1.4.1
- GNU LSH 1.4.2
- GNU LSH 1.5
- GNU LSH 1.5.1
- GNU LSH 1.5.2
- SUSE SuSE Linux 8.0
- SUSE SuSE Linux 8.1
- SUSE SuSE Linux 8.2
Reported:
Sep 20, 2003
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