CVE-2021-29376

Name: CVE-2021-29376
Creator: NVD / NIST
Published: 2021-03-30T07:15:12.007+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.33%

Last modified Jun 17, 2026

CVE-2021-29376 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. ircII before 20210314 allows remote attackers to cause a denial of service (segmentation fault and client crash, disconnecting the victim from an IRC server) via a crafted CTCP UTC message.. EPSS estimates a 2.33% chance of exploitation in the next 30 days.

Description

ircII before 20210314 allows remote attackers to cause a denial of service (segmentation fault and client crash, disconnecting the victim from an IRC server) via a crafted CTCP UTC message.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

2.33%

81.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Eterna	Ircii	< 20210314
Debian	Debian Linux	9.0

References

http://www.eterna.com.au/ircii/Product, Vendor Advisory
http://www.openwall.com/lists/oss-security/2021/03/30/4Mailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/08/msg00022.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/08/msg00023.htmlMailing List, Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/03/24/2Mailing List, Third Party Advisory
http://www.eterna.com.au/ircii/Product, Vendor Advisory
http://www.openwall.com/lists/oss-security/2021/03/30/4Mailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/08/msg00022.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/08/msg00023.htmlMailing List, Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/03/24/2Mailing List, Third Party Advisory

Timeline

Published: Mar 30, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-29376?

ircII before 20210314 allows remote attackers to cause a denial of service (segmentation fault and client crash, disconnecting the victim from an IRC server) via a crafted CTCP UTC message.

How severe is CVE-2021-29376?

CVE-2021-29376 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.33% probability of exploitation in the next 30 days.

How do I fix CVE-2021-29376?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-29376?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST