CVE-2019-3557
Critical
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).
SeverityCritical
CVSS9.8
Exploit probability—
Product
Facebook Hhvm
PublishedJan 15, 2019
First seenJan 15, 2019
Weakness typeCWE-125Out-of-bounds read
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| facebook hhvm | v ≤ 3.27.4, 3.28.0 ≤ v ≤ 3.30.0 | — |
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