CVE-2021-29376
ircII before 20210314 allows remote attackers to cause a denial of service (segmentation fault...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2021-29376- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2021-29376- Updated
- 2026-11-02
EUVDEUVD-2021-16011 No score
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.
- Record
EUVD-2021-16011- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-93fj-mjr2-94hw No score
ircII before 20210314 allows remote attackers to cause a denial of service (segmentation fault...
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.
- Record
GHSA-93fj-mjr2-94hw- Updated
- 2026-11-02
OSVALPINE-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.
- Record
ALPINE-CVE-2021-29376- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-03
OSV
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.
- Record
CVE-2021-29376- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-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.
- Record
DEBIAN-CVE-2021-29376- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-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.
- Record
UBUNTU-CVE-2021-29376- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
irciiAlpine:v3.12 |
before 20210314-r0 | 20210314-r0 |
irciiAlpine:v3.13 |
before 20210314-r0 | 20210314-r0 |
irciiAlpine:v3.14 |
before 20210314-r0 | 20210314-r0 |
irciiAlpine:v3.15 |
before 20210314-r0 | 20210314-r0 |
irciiAlpine:v3.16 |
before 20210314-r0 | 20210314-r0 |
irciiAlpine:v3.17 |
before 20210314-r0 | 20210314-r0 |
irciiAlpine:v3.18 |
before 20210314-r0 | 20210314-r0 |
irciiAlpine:v3.19 |
before 20210314-r0 | 20210314-r0 |
irciiAlpine:v3.20 |
before 20210314-r0 | 20210314-r0 |
irciiAlpine:v3.21 |
before 20210314-r0 | 20210314-r0 |
Show 17 moreShow less
| Package | Affected | Fixed |
|---|---|---|
irciiAlpine:v3.22 |
before 20210314-r0 | 20210314-r0 |
irciiAlpine:v3.23 |
before 20210314-r0 | 20210314-r0 |
irciiAlpine:v3.24 |
before 20210314-r0 | 20210314-r0 |
irciiDebian:12 |
before 20210314-1 | 20210314-1 |
irciiDebian:13 |
before 20210314-1 | 20210314-1 |
irciiDebian:14 |
before 20210314-1 | 20210314-1 |
scrollzDebian:12 |
before 2.2.3-2 | 2.2.3-2 |
scrollzDebian:9 |
before 2.2.3-1+deb9u1, plus listed versions 2.2.3-1 |
2.2.3-1+deb9u1 |
irciiDebian:9 |
before 20151120-1+deb9u1, plus listed versions 20151120-1 |
20151120-1+deb9u1 |
irciiUbuntu:16.04:LTS |
All versions, plus listed versions 20060725-120060725-1build1 |
None known |
irciiUbuntu:18.04:LTS |
All versions, plus listed versions 20170704-120170704-1build1 |
None known |
irciiUbuntu:20.04:LTS |
All versions, plus listed versions 20190117-1 |
None known |
irciiUbuntu:22.04:LTS |
All versions, plus listed versions 20210314+really20190117-120210328-220210328-2build1 |
None known |
irciiUbuntu:24.04:LTS |
All versions, plus listed versions 20210328-2build120210328-2build220210328-2build3 |
None known |
irciiUbuntu:25.10 |
All versions, plus listed versions 20240918-1 |
None known |
irciiUbuntu:26.10 |
All versions, plus listed versions 20240918-1.120240918-1.1build1 |
None known |
irciiUbuntu:26.04:LTS |
All versions, plus listed versions 20240918-120240918-1.1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected | OSV | |
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-29376 is a high vulnerability (CVSS 7.5) in Eterna Ircii, published March 30, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.26%, the 83rd percentile. Fixed in ircii 20210314-r0.