CVE-2004-1440 Memory corruption in n/a

High 7.5 Published 13 Feb 2005 Updated 8 Aug 2024

Remote attackers can execute arbitrary code or cause denial of service via crafted SSH2 packets exploiting heap buffer overflows in PuTTY.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2004-1440?

CVE-2004-1440 is a high-severity memory corruption vulnerability in n/a, published on 13 Feb 2005. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Which versions are affected by CVE-2004-1440?

It affects 1 product.

Products include Putty Putty.

How do I fix CVE-2004-1440?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2004-1440 being exploited?

There is no known exploitation of CVE-2004-1440 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2004-1440, GHSA-8hpx-pjhm-89hr.