PT-2020-15148 · Facebook · Hhvm

Published 2020-03-03 · Updated 2020-03-05 · CVE-2020-1892

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions HHVM versions 4.9.0 through 4.45.0 HHVM versions prior to 4.8.7

Description The issue is caused by insufficient boundary checks when decoding JSON in JSON parser, allowing read access to out of bounds memory. This can potentially lead to information leak and Denial of Service (DOS).

Recommendations For HHVM versions 4.9.0 through 4.45.0, update to a version that includes the fix for this issue. For HHVM versions prior to 4.8.7, update to a version that includes the fix for this issue. As a temporary workaround, consider restricting access to the JSON parser function until a patch is available.

Fix

DoS

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2020-1892

Affected Products

Hhvm

References · 7

• https://github.com/facebook/hhvm/commit/dabd48caf74995e605f1700344f1ff4a5d83441d · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2020-1892 · Security Note
• https://hhvm.com/blog/2020/02/20/security-update.html · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-1892 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-1892 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-1892 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-1892 · Security Note