PuTTY SSH2_MSG_DEBUG buffer overflow
| putty-ssh2msgdebug-bo (17886) |  High Risk |
Description:
PuTTY is vulnerable to a buffer overflow, caused by improper bounds checking of the user-supplied stringlen parameter. By sending a specially-crafted SSH2_MSG_DEBUG packet, a remote attacker could overflow the buffer and execute arbitrary code on the system with user privileges.
Consequences:
Gain Access
Remedy:
Upgrade to the latest version of PuTTY (0.56 or later), available from the PuTTY Download Web Page. See References.
For TortoiseCVS:
Upgrade to the latest version of TortoiseCVS (1.8.3 or later), available from the TortoiseCVS Download Web page. See References.
For Gentoo Linux:
Upgrade to the latest version of putty (0.56 or later), as listed in GLSA 200410-29. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
References:
- BugTraq Mailing List, Tue Oct 26 2004 - 22:02:22 CDT: PuTTY SSH client vulnerability.
- iDEFENSE Security Advisory 10.27.04: PuTTY SSH2_MSG_DEBUG Buffer Overflow Vulnerability.
- PuTTY Download Web Page: PuTTY Download Page.
- TortoiseCVS Download Web page: TortoiseCVS - Download.
- BID-11549: PuTTY Remote SSH2_MSG_DEBUG Buffer Overflow Vulnerability
- CVE-2004-1008: Integer signedness error in the ssh2_rdpkt function in PuTTY before 0.56 allows remote attackers to execute arbitrary code via a SSH2_MSG_DEBUG packet with a modified stringlen parameter, which leads to a buffer overflow.
- GLSA-200410-29: PuTTY: Pre-authentication buffer overflow
- SA12987: PuTTY "SSH2_MSG_DEBUG" Packet Handling Buffer Overflow Vulnerability
- SA13012: TortoiseCVS "SSH2_MSG_DEBUG" Packet Handling Buffer Overflow
- SA17214: IBM TotalStorage SAN Volume Controller PuTTY Vulnerability
Platforms Affected:
- Gentoo Linux
- PuTTY PuTTY 0.55
- PuTTY PuTTY IPv6
- TortoiseCVS TortoiseCVS prior to 1.8.3
Reported:
Oct 27, 2004
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