CVE-2020-1921

Summary:

In the crypt function, we attempt to null terminate a buffer using the size of the input salt without validating that the offset is within the 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.

Reference Links(if available):

https://github.com/facebook/hhvm/commit/08193b7f0cd3910256e00d599f0f3eb2519c44ca

https://hhvm.com/blog/2021/02/25/security-update.html

CVSS Score (if available)

v2: / MEDIUM

v3: /

Links to Exploits(if available)