CVE-2018-6345
Last modified
CVE-2018-6345 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The function number_format is vulnerable to a heap overflow issue when its second argument ($dec_points) is excessively large. The internal implementation of the function will cause a string to be created with an invalid length, which can then interact poorly with other functions. EPSS estimates a 1.75% chance of exploitation in the next 30 days.
Description
The function number_format is vulnerable to a heap overflow issue when its second argument ($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/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Hhvm | <= 3.27.5 | |
| Hhvm | >= 3.28.0, <= 3.30.1 |
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
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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