CVE-2019-11935: facebook hhvm Out-of-bounds Read
CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2019-11935
Published 04-12-2019Last modified 04-08-2024
Vulnerability summary
CVE-2019-11935 is a critical (CVSS 9.8) Out-of-bounds Read vulnerability in facebook hhvm. EPSS estimates a 1.48% chance of exploitation in the next 30 days, higher than 73.5% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
1.48%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 04-12-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
3 scores · 2 sources · 2 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 2 agree
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
1.48%
Chance of exploitation in the next 30 days
Percentile
74%
Versus all other CVEs
30-day change
0.00 pp
From 1.48% on 20-09-2026
20-09-202620-10-2026
EPSS score1.48%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.
- CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.
Affected systems
Facebook1 product
- hhvm4.28.2 | ≥ 4.28.0, < unspecified | 4.27.1 | ≥ 4.27.0, < unspecified | 4.26.1 | ≥ 4.26.0, < unspecified | 4.25.1 | ≥ 4.25.0, < unspecified | 4.24.1 | ≥ 4.24.0, < unspecified | 4.23.2 | ≥ 4.9.0, < unspecified | 4.8.6 | ≥ 4.0.0, < unspecified | 3.30.12 | ≥ unspecified, < 3.30.12 | < 3.30.12 | ≥ 4.0.0, ≤ 4.8.5 | ≥ 4.9.0, ≤ 4.23.1 | 4.24.0 | 4.25.0 | 4.26.0 | 4.27.0 | 4.28.0 | 4.28.1
Ubuntu1 product
- hhvmAll versions (No fix recorded)
2 vendors · 2 products
References
5 links- github.com/facebook/hhvm/commit/1c518555dba6ceb45d5ba61845b96e261219c3b7X Refsource CONFIRMPatchThird Party AdvisoryREPORT