PT-2021-10302 · Facebook · Hhvm

Published 2021-03-10 · Updated 2021-03-15 · CVE-2020-1918

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: HHVM versions prior to 4.56.3 HHVM versions 4.57.0 through 4.80.1 HHVM versions 4.81.0 through 4.93.1 HHVM versions 4.94.0 through 4.98.0

Description: In-memory file operations, such as using fopen on a data URI, did not properly restrict negative seeking, allowing for the reading of memory prior to the in-memory buffer.

Recommendations: For HHVM versions prior to 4.56.3, update to version 4.56.3 or later. For HHVM versions 4.57.0 through 4.80.1, update to version 4.80.2 or later. For HHVM versions 4.81.0 through 4.93.1, update to version 4.93.2 or later. For HHVM versions 4.94.0 through 4.98.0, update to a version later than 4.98.0.

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

CWE-127

Related Identifiers

CVE-2020-1918

Affected Products

Hhvm

References · 8

• https://github.com/facebook/hhvm/commit/08193b7f0cd3910256e00d599f0f3eb2519c44ca · Patch
• https://ubuntu.com/security/CVE-2020-1918 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-1918 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-1918 · Vendor Advisory
• https://hhvm.com/blog/2021/02/25/security-update.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-1918 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-1918 · Security Note
• https://t.me/cibsecurity/24696 · Telegram Post