Mozilla · Firefox Esr · CVE-2017-5444
**Name of the Vulnerable Software and Affected Versions**
Thunderbird versions prior to 52.1
Firefox ESR versions prior to 52.1
Firefox versions prior to 53
Firefox ESR versions prior to 45.9
**Description**
A buffer overflow vulnerability occurs while parsing "application/http-index-format" format content when the header contains improperly formatted data, allowing for an out-of-bounds read of data from memory. The vulnerability is related to the implementation of the `nsDirIndexParser::ParseData` method in the `nsDirIndexParser.cpp` file, which can lead to a buffer overflow in memory. This issue can be exploited by a remote attacker to gain access to protected information.
**Recommendations**
For Thunderbird versions prior to 52.1, update to version 52.1 or later.
For Firefox ESR versions prior to 52.1, update to version 52.1 or later.
For Firefox versions prior to 53, update to version 53 or later.
For Firefox ESR versions prior to 45.9, update to version 45.9 or later.