Use After Free in F5 Njs
CVE-2020-24349
njs through 0.4.3, used in NGINX, allows control-flow hijack in njs_value_property in njs_value.c. NOTE: the vendor considers the issue to be "fluff" in the NGINX use case because there is no remote attack surface.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (42.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cwe.mitre.org/data/definitions/416.html (Third Party Advisory)
- github.com/nginx/njs/issues/324 (Exploit, Patch, Third Party Advisory, Issue Tracking)
- security.netapp.com/advisory/ntap-20200918-0001/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-24349?
- CVE-2020-24349 is a medium-severity vulnerability in F5 Njs, classified under Use After Free. CVSS score: 5.5/10. Published 2020-08-13.
- How severe is CVE-2020-24349?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2020-24349 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.