CVE-2021-42074
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.75%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.75% probability · 77th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- barrier project/barrier
- Source
- cve@mitre.org
References
- http://www.openwall.com/lists/oss-security/2021/11/02/4Exploit, Mailing List, Third Party Advisory
- https://github.com/debauchee/barrier/releases/tag/v2.3.4Release Notes, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/11/02/4Exploit, Mailing List, Third Party Advisory
- https://github.com/debauchee/barrier/releases/tag/v2.3.4Release Notes, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.