CVEvulnerability

CVE-2020-1918

7.5 HIGH Published 2021-03-10 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-03-10
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0 ([email protected])
5.0 MEDIUM — AV:N/AC:L/Au:N/C:P/I:N/A:N
Weaknesses
CWE-125, CWE-127

Description

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

Affected configurations

• facebook hhvm (< 4.56.3) • facebook hhvm (>= 4.57.0 < 4.80.2) • facebook hhvm (>= 4.81.0 < 4.93.2) • 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

Related

Weakness · CWE (2)

  • CWE-125 Out-of-bounds Read weakness
  • CWE-127 Buffer Under-read weakness

References