CVE-2023-33982

low-risk
Published 2023-05-24

Bramble Handshake Protocol (BHP) in Briar before 1.5.3 is not forward secure: eavesdroppers can decrypt network traffic between two accounts if they later compromise both accounts. NOTE: the eavesdropping is typically impractical because BHP runs over an encrypted session that uses the Tor hidden service protocol.

Do I need to act?

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0.13% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.9/10 Medium
NETWORK / HIGH complexity

Affected Products (1)

Briar

Affected Vendors

Briarproject

References (4)

Vendor Advisory https://briarproject.org/news/2023-three-security-issues-found-and-fixed/
Exploit https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto...
Vendor Advisory https://briarproject.org/news/2023-three-security-issues-found-and-fixed/
Exploit https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto...
24
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 1/34 · Minimal
Exposure 5/34 · Minimal