Vulnerability · Published Mar 3, 2020 · Assigned by facebook
CVE-2020-1892
High 8.1
In plain English
A high-severity out-of-bounds read in HHVM from Facebook. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 66% of all known vulnerabilities).
Severity (CVSS NVD)8.1High
Exploit odds (30 days)1.1%top 34.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-125
References
- https://hhvm.com/blog/2020/02/20/security-update.html x_refsource_CONFIRM
- https://github.com/facebook/hhvm/commit/dabd48caf74995e605f1700344f1ff4a5d83441d x_refsource_CONFIRM