Vulnerability in Putty
CVE-2004-1440
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.
Published · last modified .
CVSS v2 metric
CVSS v2 base score 7.5 (High). Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.041 (90.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.041 · newest: 0.041 · change: 0.000
Affected products
- Putty — versions 0.48, 0.49, 0.50
Public proof-of-concept exploits
References
- www.gentoo.org/security/en/glsa/glsa-200408-04.xml (vendor-advisory, Patch)
- www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
- www.securityfocus.com/bid/10850 (Patch, vdb-entry)
- secunia.com/advisories/12212/ (Patch, third-party-advisory)
- www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-modpow.html
- exchange.xforce.ibmcloud.com/vulnerabilities/16885 (vdb-entry)
- marc.info/ (mailing-list)
Frequently asked questions
- What is CVE-2004-1440?
- CVE-2004-1440 is a vulnerability in Putty. Published 2004-12-31.
- Is CVE-2004-1440 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.