CVE-2004-1440
HIGH severity · CVSS 7.5
7.5CVSS HIGH
Summary
Multiple heap-based buffer overflows in the modpow function in PuTTY before 0.55 allow (1) remote attackers to execute arbitrary code via an SSH2 packet with a base argument that is larger than the mod argument, which causes the modpow function to write memory before the beginning of its buffer, and (2) remote malicious servers to cause a denial of service (client crash) and possibly execute arbitrary code via a large bignum during authentication.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges required—
User interaction—
Confidentiality impact—
Integrity impact—
Availability impact—
Exploit probability (EPSS)4%
AV:N/AC:L/Au:N/C:P/I:P/A:P
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: http://secunia.com/advisories/12212/ ↗
Additional information
- NVD record
- http://secunia.com/advisories/12212/Patch
- http://www.gentoo.org/security/en/glsa/glsa-200408-04.xmlPatch
- http://www.securityfocus.com/bid/10850Patch
- http://marc.info/?l=bugtraq&m=109167869528138&w=2
- http://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
- http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-modpow.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/16885