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CVE-2007-2243

5.0 · MEDIUM

OpenSSH 4.6 and earlier, when ChallengeResponseAuthentication is enabled, allows remote attackers to determine the existence of user accounts by attempting to authenticate via S/KEY, which displays…

Published Apr 25, 2007openbsdCWE-287EPSS 2.40%

Overview

CVE-2007-2243 is a medium-severity vulnerability affecting openbsd openssh. It was published on April 25, 2007 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

OpenSSH 4.6 and earlier, when ChallengeResponseAuthentication is enabled, allows remote attackers to determine the existence of user accounts by attempting to authenticate via S/KEY, which displays a different response if the user account exists, a similar issue to CVE-2001-1483.

Remediation

Check the references section for vendor advisories and patches from openbsd. Update openssh 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.grok.org.uk/pipermail/full-disclosure/2007-April/053906.htmlReflists.grok.org.uk/pipermail/full-disclosure/2007-April/053951.htmlRefsecurityreason.com/securityalert/2631Refwww.osvdb.org/34600Refwww.securityfocus.com/bid/23601Refexchange.xforce.ibmcloud.com/vulnerabilities/33794Refsecurity.netapp.com/advisory/ntap-20191107-0003/Reflists.grok.org.uk/pipermail/full-disclosure/2007-April/053906.htmlReflists.grok.org.uk/pipermail/full-disclosure/2007-April/053951.htmlRefsecurityreason.com/securityalert/2631

How CyberStrike helps

Frequently asked questions

What is CVE-2007-2243?

CVE-2007-2243 is a medium-severity vulnerability affecting openbsd openssh. It was published on April 25, 2007 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2007-2243?

This vulnerability has a CVSS 2.0 base score of 5.0, 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-2007-2243?

Check the references section for vendor advisories and patches from openbsd. Update openssh 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-2007-2243?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2007-2243 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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