CVE-2015-5523

Public Exploit

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.

Category

4.3
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 9.69% Top 10%
Vendor Advisory apple.com Vendor Advisory ubuntu.com Vendor Advisory debian.org Vendor Advisory apple.com Vendor Advisory apple.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.securitytracker.com/id/1033703 vdb entry
http://www.openwall.com/lists/oss-security/2015/07/13/7 mailing list exploit
https://support.apple.com/HT205212 third party advisory
http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html mailing list third party advisory vendor advisory
http://www.openwall.com/lists/oss-security/2015/06/04/2 mailing list exploit
http://www.ubuntu.com/usn/USN-2695-1 third party advisory vendor advisory
https://support.apple.com/HT205267 third party advisory
http://www.debian.org/security/2015/dsa-3309 third party advisory vendor advisory
http://lists.apple.com/archives/security-announce/2015/Sep/msg00005.html mailing list third party advisory vendor advisory
https://github.com/htacg/tidy-html5/issues/217#issuecomment-108565501 exploit
https://support.apple.com/HT205213 third party advisory
http://www.securityfocus.com/bid/75037 vdb entry
http://lists.apple.com/archives/security-announce/2015/Sep/msg00001.html mailing list third party advisory vendor advisory
http://www.openwall.com/lists/oss-security/2015/07/15/3 mailing list

Frequently Asked Questions

What is the severity of CVE-2015-5523?
CVE-2015-5523 has been scored as a medium severity vulnerability.
How to fix CVE-2015-5523?
To fix CVE-2015-5523, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2015-5523 being actively exploited in the wild?
It is possible that CVE-2015-5523 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~10% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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