Home/CVE/Insufficient boundary checks when processing a string in mb_ereg_replace allows access to out-of-bounds memory. This iss
CVE

CVE-2019-11935

Insufficient boundary checks when processing a string in mb_ereg_replace allows access to out-of-bounds memory. This iss

Insufficient boundary checks when processing a string in mb_ereg_replace allows access to out-of-bounds memory. This issue affects HHVM versions prior to 3.30.12, all versions between 4.0.0 and 4.8.5, all versions between 4.9.0 and 4.23.1, as well as 4.24.0, 4.25.0, 4.26.0, 4.27.0, 4.28.0, and 4.28.1.

CRITICAL · CVSS 9.8 EPSS 0.00644
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-125Out-of-bounds Read
▤

Affected Products & Versions

4
facebook hhvm< 3.30.12
facebook hhvm>= 4.0.0 and <= 4.8.5
facebook hhvm>= 4.9.0 and <= 4.23.1
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 NVD04 Dec 2019 · 05:16 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/1c518555dba6ceb45d5ba61845b96e261219c3b7PatchThird Party Advisory
https://hhvm.com/blog/2019/10/28/security-update.htmlVendor Advisory
https://www.facebook.com/security/advisories/cve-2019-11935Vendor Advisory
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