CVE-2020-1918: High severity facebook hiphop virtual machine vulnerability
In-memory file operations (ie: using fopen on a data URI) did not properly restrict negative seeking, allowing for the reading of memory prior to the in-memory buffer. This issue affects HHVM versions prior to 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.81.0 and 4.93.1, and versions 4.94.0, 4.95.0, 4.96.0, 4.97.0, 4.98.0.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the vulnerability ID of this issue?
The vulnerability ID is CVE-2020-1918.
What is the severity of CVE-2020-1918?
The severity of CVE-2020-1918 is high with a severity value of 7.5.
Which software versions are affected by CVE-2020-1918?
CVE-2020-1918 affects HHVM versions prior to 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.81.0 and 4.93.1.
How can I fix CVE-2020-1918?
To fix CVE-2020-1918, update your HHVM software to version 4.93.1 or later.
Where can I find more information about CVE-2020-1918?
You can find more information about CVE-2020-1918 at the following references: [link1](https://github.com/facebook/hhvm/commit/08193b7f0cd3910256e00d599f0f3eb2519c44ca), [link2](https://hhvm.com/blog/2021/02/25/security-update.html)