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CVE-2015-5523

4.3 · MEDIUM

The ParseValue function in lexer.c in tidy before 4.9.31 allows remote attackers to cause a denial of service (crash) via vectors involving multiple whitespace characters before an empty href, whic…

Published Aug 11, 2015canonicalCWE-119EPSS 3.84%

Overview

CVE-2015-5523 is a medium-severity vulnerability affecting canonical ubuntu_linux. It was published on August 11, 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

The ParseValue function in lexer.c in tidy before 4.9.31 allows remote attackers to cause a denial of service (crash) via vectors involving multiple whitespace characters before an empty href, which triggers a large memory allocation.

Remediation

Check the references section for vendor advisories and patches from canonical. Update ubuntu_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
appleiphone_os0Affected
applemac_os_x0Affected
applewatchos0Affected
htacgtidy0Affected

References

Reflists.apple.com/archives/security-announce/2015/Sep/msg00001.htmlReflists.apple.com/archives/security-announce/2015/Sep/msg00005.htmlReflists.apple.com/archives/security-announce/2015/Sep/msg00008.htmlRefwww.debian.org/security/2015/dsa-3309Refwww.openwall.com/lists/oss-security/2015/06/04/2Refwww.openwall.com/lists/oss-security/2015/07/13/7Refwww.openwall.com/lists/oss-security/2015/07/15/3Refwww.securityfocus.com/bid/75037Refwww.securitytracker.com/id/1033703Refwww.ubuntu.com/usn/USN-2695-1

How CyberStrike helps

Frequently asked questions

What is CVE-2015-5523?

CVE-2015-5523 is a medium-severity vulnerability affecting canonical ubuntu_linux. It was published on August 11, 2015 and has a CVSS 2.0 base score of 4.3 (MEDIUM).

How severe is CVE-2015-5523?

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-2015-5523?

Check the references section for vendor advisories and patches from canonical. Update ubuntu_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-2015-5523?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2015-5523 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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