CVE-2022-31307: f5 njs Use After Free
CVSS: 5.5v3.1MediumModified
Published 21-06-2022Last modified 03-08-2024
Vulnerability summary
CVE-2022-31307 is a medium (CVSS 5.5) Use After Free vulnerability in f5 njs. EPSS estimates a 0.66% chance of exploitation in the next 30 days, higher than 50.6% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
5.5/10
010
Medium · v3.1 (NVD)EPSS score
0.66%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Timeline
- 21-06-2022PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
Nginx NJS v0.7.2 was discovered to contain a segmentation violation in the function njs_string_offset at src/njs_string.c.
CVSS metrics
2 scores · 1 source · 2 versionsMedium 5.5Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HSourcesSingle source
Medium 4.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
0.66%
Chance of exploitation in the next 30 days
Percentile
51%
Versus all other CVEs
30-day change
0.00 pp
From 0.66% on 18-09-2026
18-09-202618-10-2026
EPSS score0.66%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundNjs
Maturity: poc
Weaknesses
CWE · root causeAffected systems
F51 product
- njs0.7.2
1 vendor · 1 product
References
2 links- github.com/nginx/njs/commit/eafe4c7a326b163612f10861392622b5da5b1792X Refsource MISCPatchThird Party Advisory