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CVE-2019-3557

N/A
Published: January 15, 2019 at 10:00 PM UTC
Updated: June 17, 2026 at 02:35 AM UTC
1 product affected across 1 vendorHHVM

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Severity
N/A
Exploit prediction
EPSS 2%

Description

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).

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

HHVM· Facebook
95%
v ≥ 3.30.0v ≤ 3.27.4v < 3.27.53.28.0 ≤ v ≤ 3.30.03.27.53.30.03.30.1
Affected range stops below 3.27.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/facebook/hhvm/commit/6e4dd9ec3f14b48170fc45dc9d13a3261765f994
x_refsource_MISCVendor Advisory
Source: [email protected]
https://hhvm.com/blog/2019/01/14/hhvm-3.30.2.html

CVSS

7.5HIGH[email protected]
Confidentiality
PARTIAL
Integrity
PARTIAL
Availability
PARTIAL
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-125

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