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CVE-2015-5309

4.3 · MEDIUM

Integer overflow in the terminal emulator in PuTTY before 0.66 allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via an ECH (erase characte…

Published Dec 7, 2015opensuseCWE-189EPSS 3.47%

Overview

CVE-2015-5309 is a medium-severity vulnerability affecting opensuse leap. It was published on December 7, 2015 and has a CVSS 2.0 base score of 4.3 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Integer overflow in the terminal emulator in PuTTY before 0.66 allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via an ECH (erase characters) escape sequence with a large parameter value, which triggers a buffer underflow.

Remediation

Check the references section for vendor advisories and patches from opensuse. Update leap to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
simon_tathamputty0Affected

References

Reflists.fedoraproject.org/pipermail/package-announce/2015-December/173021.htmlReflists.fedoraproject.org/pipermail/package-announce/2015-December/173094.htmlReflists.opensuse.org/opensuse-updates/2015-11/msg00099.htmlRefwww.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-ech-overflow.htmlRefwww.debian.org/security/2015/dsa-3409Refwww.securitytracker.com/id/1034308Refsecurity.gentoo.org/glsa/201606-01Reflists.fedoraproject.org/pipermail/package-announce/2015-December/173021.htmlReflists.fedoraproject.org/pipermail/package-announce/2015-December/173094.htmlReflists.opensuse.org/opensuse-updates/2015-11/msg00099.html

How CyberStrike helps

Frequently asked questions

What is CVE-2015-5309?

CVE-2015-5309 is a medium-severity vulnerability affecting opensuse leap. It was published on December 7, 2015 and has a CVSS 2.0 base score of 4.3 (MEDIUM).

How severe is CVE-2015-5309?

This vulnerability has a CVSS 2.0 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2015-5309?

Check the references section for vendor advisories and patches from opensuse. Update leap to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2015-5309?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2015-5309 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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