CVE-2021-24036 Information

Description

Passing an attacker controlled size when creating an IOBuf could cause integer overflow leading to an out of bounds write on the heap with the possibility of remote code execution. This issue affects versions of folly prior to v2021.07.22.00. This issue affects HHVM versions prior to 4.80.5 all versions between 4.81.0 and 4.102.1 all versions between 4.103.0 and 4.113.0 and versions 4.114.0 4.115.0 4.116.0 4.117.0 4.118.0 and 4.118.1.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://hhvm.com/blog/2021/07/20/security-update.html https://github.com/facebook/folly/commit/4f304af1411e68851bdd00ef6140e9de4616f7d3 https://www.facebook.com/security/advisories/cve-2021-24036

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8