PT-2023-24617 · Briar · Briar

Published 2023-05-24 · Updated 2025-01-16 · CVE-2023-33983

Positive Technologies (AI Summary)

CVSS v3.1

7.4

High

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Name of the Vulnerable Software and Affected Versions Briar versions 1.5.3 and earlier

Description The Introduction Client in Briar does not implement out-of-band verification for the public keys of introducees. This allows an introducer to launch man-in-the-middle attacks against later private communication between two introduced parties.

Recommendations For Briar versions 1.5.3 and earlier, as a temporary workaround, consider disabling the introduction feature until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2023-33983

Affected Products

Briar

References · 6

• 🔥 https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_YuanmingSong.pdf · Exploit
• https://osv.dev/vulnerability/CVE-2023-33983 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-33983 · Security Note
• https://t.me/cvenotify/107641 · Telegram Post
• https://t.me/cibsecurity/64710 · Telegram Post
• https://t.me/cvenotify/51074 · Telegram Post