Description
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.
References (2)
Core 2
Core References
Vendor Advisory x_refsource_misc
https://hhvm.com/blog/2021/02/25/security-update.html
Patch, Third Party Advisory x_refsource_misc
https://github.com/facebook/hhvm/commit/08193b7f0cd3910256e00d599f0f3eb2519c44ca
Scores
CVSS v3
7.5
EPSS
0.0059
EPSS Percentile
69.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-121
CWE-787
Status
published
Products (6)
facebook/hhvm
4.94.0
facebook/hhvm
4.95.0
facebook/hhvm
4.96.0
facebook/hhvm
4.97.0
facebook/hhvm
4.98.0
facebook/hhvm
< 4.56.3
Published
Mar 10, 2021
Tracked Since
Feb 18, 2026