Endpoint Vulnerability

Key pinning is ignored when overridable errors are encountered

Description

Mozilla security engineer David Keeler reported that when an overridable error is encountered, such as those for expired certificates or a host name does not match a certificate, pinning checks can be be skipped. This would allow for a user to override a pinned certificate when they should not be able to do so. This issue does not allow for third parties to cause a certificate to be overridden and the user would still have to manually do so.

Affected Products

Thunderbird

References

CVE-2015-2741,