Private-message interception via unauthenticated introduction keys
Published May 24, 2023 · Updated Jan 16, 2025
Authentication failure in Briar 1.5.3 and earlier allows remote attackers to intercept introduced contacts' private communications. The Introduction Client accepts introducees' public keys without an out-of-band identity check, letting the introducer substitute separate keys and master secrets for each party. The attacker must already be the introducer; successful interception exposes and permits modification of later messages between parties that accept the introduction.
Summary
What happened
Authentication failure in Briar 1.5.3 and earlier allows remote attackers to intercept introduced contacts' private communications. The Introduction Client accepts introducees' public keys without an out-of-band identity check, letting the introducer substitute separate keys and master secrets for each party. The attacker must already be the introducer; successful interception exposes and permits modification of later messages between parties that accept the introduction.
The record
- CVE
- CVE-2023-33983
- Published
- May 24, 2023
- Updated
- Jan 16, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-862, T1557
- Attack vector
- network
- Privileges
- Unavailable
Timeline
How it unfolded
- May 24, 2023CVE publishedPublication date reported by the CVE source.
- Jan 16, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- Introduction Client active man-in-the-middle attackproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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