Home/CVE/The implementations of streams for bz2 and php://output improperly implemented their readImpl functions, returning -1 co
CVE

CVE-2019-3557

The implementations of streams for bz2 and php://output improperly implemented their readImpl functions, returning -1 co

The implementations of streams for bz2 and php://output improperly implemented their readImpl functions, returning -1 consistently. This behavior caused some stream functions, such as stream_get_line, to trigger an out-of-bounds read when operating on such malformed streams. The implementations were updated to return valid values consistently.

This affects all supported versions of HHVM (3.30 and 3.27.4 and below).

CRITICAL · CVSS 9.8 EPSS 0.00746
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-125Out-of-bounds Read
CWE-125Out-of-bounds Read
▤

Affected Products & Versions

2
facebook hhvm<= 3.27.4
facebook hhvm>= 3.28.0 and <= 3.30.0
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.0 · cve-assign@fb.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD15 Jan 2019 · 10:29 PM
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/facebook/hhvm/commit/6e4dd9ec3f14b48170fc45dc9d13a3261765f994PatchThird Party Advisory
https://hhvm.com/blog/2019/01/14/hhvm-3.30.2.htmlVendor Advisory
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