Critical severity · published Jan 15, 2019
CVE-2019-3557
The implementations of streams for bz2 and php://output improperly implemented their readImpl functions, returning -1 consistently
9.8
CVSS
1.7%
EPSS
No
On KEV
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).
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.7% · higher than 77% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HH
HHVM · Facebook
3.30.1; 3.30.0 before unspecified; 3.27.5; before 3.27.5 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-3557
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-3557
Patch
https://github.com/facebook/hhvm/commit/6e4dd9ec3f14b48170fc45dc9d13a3261765f994
Vendor Advisory
https://hhvm.com/blog/2019/01/14/hhvm-3.30.2.html
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