CVE-2016-5254
high-risk
Published 2016-08-05
Use-after-free vulnerability in the nsXULPopupManager::KeyDown function in Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 allows attackers to execute arbitrary code or cause a denial of service (heap memory corruption and application crash) by leveraging keyboard access to use the Alt key during selection of top-level menu items.
Do I need to act?
~
1.5% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10
Critical
NETWORK
/ LOW complexity
References (22)
Vendor Advisory
http://www.mozilla.org/security/announce/2016/mfsa2016-70.html
Third Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.h...
Issue Tracking
https://bugzilla.mozilla.org/show_bug.cgi?id=1266963
Vendor Advisory
http://www.mozilla.org/security/announce/2016/mfsa2016-70.html
Third Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.h...
and 2 more references
50
/ 100
high-risk
Severity
32/34 · Critical
Exploitability
4/34 · Minimal
Exposure
14/34 · Moderate