CVE-2016-5259
moderate-risk
Published 2016-08-05
Use-after-free vulnerability in the CanonicalizeXPCOMParticipant function in Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 allows remote attackers to execute arbitrary code via a script that closes its own Service Worker within a nested sync event loop.
Do I need to act?
~
1.1% 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
8
CVSS 8.8/10
High
NETWORK
/ LOW complexity
References (22)
Vendor Advisory
http://www.mozilla.org/security/announce/2016/mfsa2016-73.html
Third Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.h...
Vendor Advisory
http://www.mozilla.org/security/announce/2016/mfsa2016-73.html
Third Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.h...
and 2 more references
47
/ 100
moderate-risk
Severity
30/34 · Critical
Exploitability
3/34 · Minimal
Exposure
14/34 · Moderate