Vulnerability · Published Mar 3, 2020 · Assigned by facebook
CVE-2020-1893
High 7.5
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 67% of all known vulnerabilities).
Severity (CVSS NVD)7.5High
Exploit odds (30 days)1.1%top 33.1% 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 TryParse reads out of bounds memory, potentially leading to 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/bd586671a3c22eb2f07e55f11b3ce64e1f7961e7 x_refsource_CONFIRM