Auth bypass in Briarproject Briar
CVE-2023-33983
The Introduction Client in Briar through 1.5.3 does not implement out-of-band verification for the public keys of introducees. An introducer can launch man-in-the-middle attacks against later private communication between two introduced parties.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.006 (46.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
Weakness classification (CWE)
References
- ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/educat… (Technical Description, Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-33983?
- CVE-2023-33983 is a high-severity vulnerability in Briarproject Briar, classified under Missing Authorization. CVSS score: 7.4/10. Published 2023-05-24.
- How severe is CVE-2023-33983?
- High severity. CVSS v3 base score is 7.4 out of 10.