CVE-2004-1440

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.

7.5

CVSS

Severity: High

CVSS 2.0 •

EPSS 4.16% Top 15%

Vendor Advisory gentoo.org

Affected: n/a n/a

References

Link	Tags
http://www.gentoo.org/security/en/glsa/glsa-200408-04.xml	patch vendor advisory
http://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
http://www.securityfocus.com/bid/10850	patch vdb entry
http://secunia.com/advisories/12212/	third party advisory patch
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-modpow.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/16885	vdb entry
http://marc.info/?l=bugtraq&m=109167869528138&w=2	mailing list

Frequently Asked Questions

What is the severity of CVE-2004-1440?: CVE-2004-1440 has been scored as a high severity vulnerability.
How to fix CVE-2004-1440?: To fix CVE-2004-1440, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2004-1440 being actively exploited in the wild?: It is possible that CVE-2004-1440 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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