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.
Product(s):
- PuTTY 0.48
- PuTTY 0.49
- PuTTY 0.50
- PuTTY 0.51
- PuTTY 0.52
- PuTTY 0.53
- PuTTY 0.53b
- PuTTY 0.54
Question to Ask Vendors:
- Can you confirm whether your systems are affected by CVE-2004-1440, and if so, what steps are you currently taking to mitigate this vulnerability?
- What is your estimated timeline for fully resolving CVE-2004-1440 in your products or services, and how will you communicate updates on this issue to us as your customer?
Recommended Actions:
- Check out the advisory links provided below.