CVE-2015-5523

Name: CVE-2015-5523
Creator: NVD / NIST
Published: 2015-08-11T14:59:15.43+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 3.84%

Last modified Jun 17, 2026

CVE-2015-5523 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 3.84% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

3.84%

88.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Canonical	Ubuntu Linux	12.04
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	15.04
Debian	Debian Linux	7.0
Debian	Debian Linux	8.0
Apple	Iphone Os	<= 8.2
Apple	Mac Os X	<= 10.6.8
Apple	Watchos	<= 1.0.1
Htacg	Tidy	<= 4.9.30

References

http://lists.apple.com/archives/security-announce/2015/Sep/msg00001.htmlMailing List, Third Party Advisory
http://lists.apple.com/archives/security-announce/2015/Sep/msg00005.htmlMailing List, Third Party Advisory
http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.htmlMailing List, Third Party Advisory
http://www.debian.org/security/2015/dsa-3309Third Party Advisory
http://www.openwall.com/lists/oss-security/2015/06/04/2Exploit
http://www.openwall.com/lists/oss-security/2015/07/13/7Exploit
http://www.openwall.com/lists/oss-security/2015/07/15/3
http://www.securityfocus.com/bid/75037
http://www.securitytracker.com/id/1033703
http://www.ubuntu.com/usn/USN-2695-1Third Party Advisory
https://github.com/htacg/tidy-html5/issues/217#issuecomment-108565501Exploit
https://support.apple.com/HT205212Third Party Advisory
https://support.apple.com/HT205213Third Party Advisory
https://support.apple.com/HT205267Third Party Advisory
http://lists.apple.com/archives/security-announce/2015/Sep/msg00001.htmlMailing List, Third Party Advisory
http://lists.apple.com/archives/security-announce/2015/Sep/msg00005.htmlMailing List, Third Party Advisory
http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.htmlMailing List, Third Party Advisory
http://www.debian.org/security/2015/dsa-3309Third Party Advisory
http://www.openwall.com/lists/oss-security/2015/06/04/2Exploit
http://www.openwall.com/lists/oss-security/2015/07/13/7Exploit
http://www.openwall.com/lists/oss-security/2015/07/15/3
http://www.securityfocus.com/bid/75037
http://www.securitytracker.com/id/1033703
http://www.ubuntu.com/usn/USN-2695-1Third Party Advisory
https://github.com/htacg/tidy-html5/issues/217#issuecomment-108565501Exploit
https://support.apple.com/HT205212Third Party Advisory
https://support.apple.com/HT205213Third Party Advisory
https://support.apple.com/HT205267Third Party Advisory

Timeline

Published: Aug 11, 2015
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2015-5523?

How severe is CVE-2015-5523?

Severity scoring for CVE-2015-5523 is pending analysis. The EPSS model estimates a 3.84% probability of exploitation in the next 30 days.

How do I fix CVE-2015-5523?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2015-5523?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST