Description
The function number_format is vulnerable to a heap overflow issue when its second argument ($dec_points) is excessively large. The internal implementation of the function will cause a string to be created with an invalid length, which can then interact poorly with other functions. This affects all supported versions of HHVM (3.30.1 and 3.27.5 and below).
Metrics
CVSS 3.1 9.8/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| HHVM | 3.30.2; >= 3.30.0, < unspecified; 3.27.6; >= unspecified, < 3.27.6 |
References
- https://github.com/facebook/hhvm/commit/190ffdf6c8b1ec443be202c7d69e63a7e3da25e3Patch, Third Party Advisory
- https://hhvm.com/blog/2019/01/14/hhvm-3.30.2.htmlRelease Notes, Vendor Advisory
- https://github.com/facebook/hhvm/commit/190ffdf6c8b1ec443be202c7d69e63a7e3da25e3Patch, Third Party Advisory
- https://hhvm.com/blog/2019/01/14/hhvm-3.30.2.htmlRelease Notes, Vendor Advisory
Timeline
- Published
- Jan 15, 2019
- Last modified
- Jun 17, 2026
- NVD status
- Modified