High severity7.5NVD Advisory· Published Nov 8, 2021· Updated Jun 17, 2026
CVE-2021-42074
CVE-2021-42074
Description
An issue was discovered in Barrier before 2.3.4. An unauthenticated attacker can cause a segmentation fault in the barriers component (aka the server-side implementation of Barrier) by quickly opening and closing TCP connections while sending a Hello message for each TCP session.
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Affected products
3- Barrier/Barrierdescription
Patches
Vulnerability mechanics
References
2- www.openwall.com/lists/oss-security/2021/11/02/4nvdExploitMailing ListThird Party Advisory
- github.com/debauchee/barrier/releases/tag/v2.3.4nvdRelease NotesThird Party Advisory
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