High severity · published Mar 3, 2020
CVE-2020-1892
Insufficient boundary checks when decoding JSON in JSON_parser allows read access to out of bounds memory, potentially leading to information leak and DOS
8.1
CVSS
1.1%
EPSS
No
On KEV
Description
Insufficient boundary checks when decoding JSON in JSON_parser allows read access to out of bounds memory, potentially leading to information leak and DOS. This issue affects HHVM 4.45.0, 4.44.0, 4.43.0, 4.42.0, 4.41.0, 4.40.0, 4.39.0, versions between 4.33.0 and 4.38.0 (inclusive), versions between 4.9.0 and 4.32.0 (inclusive), and versions prior to 4.8.7.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 65% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HH
Hhvm · Facebook
before 4.8.7; 4.9.0 through 4.32.0; 4.33.0 through 4.38.0; 4.39.0; 4.40.0; 4.41.0; +4 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-1892
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-1892
Patch
https://github.com/facebook/hhvm/commit/dabd48caf74995e605f1700344f1ff4a5d83441d
Vendor Advisory
https://hhvm.com/blog/2020/02/20/security-update.html
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