Out-of-bounds Read in Fast Ber Project
CVE-2020-23921
An issue was discovered in fast_ber through v0.4. yy::yylex() in asn_compiler.hpp has a heap-based buffer over-read.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H.
EPSS exploit prediction
EPSS: 0.009 (58.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/Samuel-Tyler/fast_ber/issues/30 (Exploit, Third Party Advisory)
- cwe.mitre.org/data/definitions/126.html (Technical Description)
Frequently asked questions
- What is CVE-2020-23921?
- CVE-2020-23921 is a high-severity vulnerability in Fast Ber Project, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2021-04-21.
- How severe is CVE-2020-23921?
- High severity. CVSS v3 base score is 7.1 out of 10.
- Is CVE-2020-23921 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.