CVE-2017-7756: Use After Free
A use-after-free and use-after-scope vulnerability when logging errors from headers for XML HTTP Requests (XHR). This could result in a potentially exploitable crash.
Affected Software
Event History
Parent advisories
This vulnerability appears in the following advisories.
Peer vulnerabilities
Found alongside the following vulnerabilities.
- CVE-2017-5472
- CVE-2017-7749
- CVE-2017-7750
- CVE-2017-7751
- CVE-2017-7755
- CVE-2017-7752
- CVE-2017-7754
- CVE-2017-7756
- CVE-2017-7757
- CVE-2017-7778
- CVE-2017-7758
- CVE-2017-7763
- CVE-2017-7764
- CVE-2017-7765
- CVE-2017-5470
- CVE-2017-7759
- CVE-2017-7760
- CVE-2017-7761
- CVE-2017-7762
- CVE-2017-7766
- CVE-2017-7767
- CVE-2017-7768
- CVE-2017-7770
- CVE-2017-5471
Frequently Asked Questions
What is the severity of CVE-2017-7756?
CVE-2017-7756 has a moderate severity level due to its potential to cause crashes in affected applications.
How do I fix CVE-2017-7756?
To fix CVE-2017-7756, update your Mozilla Firefox or Thunderbird to versions above 54.0 or 52.2 respectively.
Which products are affected by CVE-2017-7756?
CVE-2017-7756 affects Mozilla Firefox versions 54 and below, Mozilla Firefox ESR up to version 52.2, and Mozilla Thunderbird up to version 52.2.
What is a use-after-free vulnerability as seen in CVE-2017-7756?
A use-after-free vulnerability, like CVE-2017-7756, occurs when a program attempts to access memory after it has already been freed, which can lead to application crashes or exploitation.
Is there a workaround for CVE-2017-7756?
There are no known workarounds for CVE-2017-7756 other than upgrading to the latest versions of the affected software.