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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.11%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 2.0
- 7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
- EPSS
- 4.11% probability · 90th percentile
- CISA KEV
- Not listed
- Affected
- putty/putty
- Source
- cve@mitre.org
References
- http://marc.info/?l=bugtraq&m=109167869528138&w=2
- http://secunia.com/advisories/12212/Patch
- http://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
- http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-modpow.html
- http://www.gentoo.org/security/en/glsa/glsa-200408-04.xmlPatch
- http://www.securityfocus.com/bid/10850Patch
- https://exchange.xforce.ibmcloud.com/vulnerabilities/16885
- http://marc.info/?l=bugtraq&m=109167869528138&w=2
- http://secunia.com/advisories/12212/Patch
- http://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
- http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-modpow.html
- http://www.gentoo.org/security/en/glsa/glsa-200408-04.xmlPatch
- http://www.securityfocus.com/bid/10850Patch
- https://exchange.xforce.ibmcloud.com/vulnerabilities/16885
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.