Track vulnerabilities like this one. Sign up free to get alerted when software you use is affected.

CVE-2017-5416: Firefox and Thunderbird may crash on network activity

CVE-2017-5416 · published 8 years ago

Summary

If a certain network event occurs, Firefox versions before 52 and Thunderbird versions before 52 can release a listener too early, causing the program to try to use something that no longer exists. This can lead to the application unexpectedly stopping. Upgrade to the latest versions of Firefox and Thunderbird to prevent the crash.

What to do

Update mozilla firefox to version 52.0 or later.
Update mozilla thunderbird to version 52.0 or later.

Affected software

Vendor	Product	Affected versions
mozilla	firefox	< 52.0 `cpe:2.3:a:mozilla:firefox::::::::`
mozilla	thunderbird	< 52.0 `cpe:2.3:a:mozilla:thunderbird::::::::`

Original advisory text

In certain circumstances a networking event listener can be prematurely released. This appears to result in a null dereference in practice. This vulnerability affects Firefox < 52 and Thunderbird <...

References

http://www.securityfocus.com/bid/96692 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1037966 Third Party Advisory VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1328121 Exploit Issue Tracking Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-05/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-09/ Vendor Advisory

Fix within

Internet-facing 14 days

Internal 60 days

Not known to be exploited
Can be exploited automatically (estimated)
Gives an attacker partial control (estimated)

Severity

7.5 High

Exploitation

2% chance of attack within 30 days

Type

CWE-476NULL Pointer Dereference

Timeline

Published11 Jun 2018

Updated3 Nov 2026

First seen29 Sep 2026

Sources

CVE-2017-5416 · NVD

Track software like this

Free during beta