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CVE-2015-2157

2.1 · LOW

The (1) ssh2_load_userkey and (2) ssh2_save_userkey functions in PuTTY 0.51 through 0.63 do not properly wipe SSH-2 private keys from memory, which allows local users to obtain sensitive informatio…

Published Mar 27, 2015debianCWE-200EPSS 0.58%

Overview

CVE-2015-2157 is a low-severity vulnerability affecting debian debian_linux. It was published on March 27, 2015 and has a CVSS 2.0 base score of 2.1 (LOW).

This vulnerability has a CVSS 2.0 base score of 2.1, rated LOW. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

The (1) ssh2_load_userkey and (2) ssh2_save_userkey functions in PuTTY 0.51 through 0.63 do not properly wipe SSH-2 private keys from memory, which allows local users to obtain sensitive information by reading the memory.

Remediation

Check the references section for vendor advisories and patches from debian. Update debian_linux 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

References

Reflists.fedoraproject.org/pipermail/package-announce/2015-March/151790.htmlReflists.fedoraproject.org/pipermail/package-announce/2015-March/151839.htmlReflists.fedoraproject.org/pipermail/package-announce/2015-March/151933.htmlReflists.opensuse.org/opensuse-updates/2015-03/msg00032.htmlRefwww.chiark.greenend.org.uk/~sgtatham/putty/changes.htmlRefwww.chiark.greenend.org.uk/~sgtatham/putty/wishlist/private-key-not-wiped-2.htmlRefwww.debian.org/security/2015/dsa-3190Refwww.openwall.com/lists/oss-security/2015/02/28/4Refwww.openwall.com/lists/oss-security/2015/02/28/5Refwww.securityfocus.com/bid/72825

How CyberStrike helps

Frequently asked questions

What is CVE-2015-2157?

CVE-2015-2157 is a low-severity vulnerability affecting debian debian_linux. It was published on March 27, 2015 and has a CVSS 2.0 base score of 2.1 (LOW).

How severe is CVE-2015-2157?

This vulnerability has a CVSS 2.0 base score of 2.1, rated LOW. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2015-2157?

Check the references section for vendor advisories and patches from debian. Update debian_linux 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-2015-2157?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2015-2157 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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