CVE-2010-1987

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2010-05-20 · updated 2026-06-16
Weakness: CWE-399

Description

Mozilla Firefox 3.6.3 on Windows XP SP3 allows remote attackers to cause a denial of service (memory consumption, out-of-bounds read, and application crash) via JavaScript code that appends long strings to the content of a P element, and performs certain other string concatenation and substring operations, related to the DoubleWideCharMappedString class in USP10.dll and the gfxWindowsFontGroup::GetUnderlineOffset function in xul.dll, a different vulnerability than CVE-2009-1571.

Affected products

Mozilla Firefox: 3.6.3

References

http://osvdb.org/64790
http://www.exploit-db.com/exploits/12678
http://www.securityfocus.com/archive/1/511329/100/0/threaded
http://www.x90c.org/advisories/firefox_3.6.3_crash_advisory.txt
https://exchange.xforce.ibmcloud.com/vulnerabilities/58762
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12013
http://osvdb.org/64790
http://www.exploit-db.com/exploits/12678
http://www.securityfocus.com/archive/1/511329/100/0/threaded
http://www.x90c.org/advisories/firefox_3.6.3_crash_advisory.txt
https://exchange.xforce.ibmcloud.com/vulnerabilities/58762
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12013

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