CVE-2021-42074

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.67% Top 30%
Third-Party Advisory openwall.com Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.openwall.com/lists/oss-security/2021/11/02/4 mailing list exploit third party advisory
https://github.com/debauchee/barrier/releases/tag/v2.3.4 third party advisory release notes

Frequently Asked Questions

What is the severity of CVE-2021-42074?
CVE-2021-42074 has been scored as a high severity vulnerability.
How to fix CVE-2021-42074?
To fix CVE-2021-42074, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-42074 being actively exploited in the wild?
It is possible that CVE-2021-42074 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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