Home/CVE/Insufficient boundary checks when formatting numbers in number_format allows read/write access to out-of-bounds memory,
CVE

CVE-2019-11929

Insufficient boundary checks when formatting numbers in number_format allows read/write access to out-of-bounds memory,

Insufficient boundary checks when formatting numbers in number_format allows read/write access to out-of-bounds memory, potentially leading to remote code execution. This issue affects HHVM versions prior to 3.30.10, all versions between 4.0.0 and 4.8.5, all versions between 4.9.0 and 4.18.2, and versions 4.19.0, 4.19.1, 4.20.0, 4.20.1, 4.20.2, 4.21.0, 4.22.0, 4.23.0.

CRITICAL · CVSS 9.8 EPSS 0.04726
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
▤

Affected Products & Versions

4
facebook hhvm< 3.30.10
facebook hhvm>= 4.0.0 and <= 4.8.5
facebook hhvm>= 4.9.0 and <= 4.18.2
facebook hhvmall versions
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · cve-assign@fb.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD02 Oct 2019 · 07:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/facebook/hhvm/commit/dbeb9a56a638e3fdcef8b691c2a2967132dae692PatchThird Party Advisory
https://hhvm.com/blog/2019/09/25/security-update.htmlVendor Advisory
https://www.facebook.com/security/advisories/cve-2019-11929Third Party Advisory
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