irssi: Null pointer dereference in the nickcmp function
Published Mar 3, 2017
7.5
HIGHCVSS 3.0
EPSS 5.59%
Description
The nickcmp function in Irssi before 0.8.21 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a message without a nick.
Affected products
No data.
Configuration 2
- 7.0
No data.
Red Hat Enterprise Linux 6
irssi
Will not fix
Red Hat Enterprise Linux 7
irssi
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | irssi | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | irssi | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat Product Security has rated this issue as having Low security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 5.59% (0.05595) | 92.66th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.59% (0.05595) | 91.88th | v5 (v2026.06.15) |
| Nov 21, 2025 | 1.88% (0.01876) | 82.57th | v4 (v2025.03.14) |
| Nov 18, 2025 | 3.37% (0.03372) | 86.15th | v4 (v2025.03.14) |
| Jul 20, 2024 | 1.08% (0.01077) | 84.43th | v3 (v2023.03.01) |
| Apr 9, 2024 | 1.08% (0.01077) | 84.01th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.08% (0.01077) | 82.01th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 17, 2023 | 1.21% (0.01213) | 66.22th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.94% (0.01943) | 48.45th | v1 |
| Jan 6, 2022 | 1.94% (0.01943) | 47.92th | v1 |
| Sep 1, 2021 | 1.94% (0.01943) | 76.51th | v1 |
| Apr 14, 2021 | 1.94% (0.01943) | 0.00th | v1 |
References (9)
- http://www.openwall.com/lists/oss-security/2017/01/06/1 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/95310 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2017-5193 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1410821 Issue Tracking
- https://irssi.org/security/irssi_sa_2017_01.txt x_refsource_CONFIRMPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2017/12/msg00022.html mailing-listx_refsource_MLISTThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-5193
- https://security.gentoo.org/glsa/201701-45 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2017-5193
| Link | Providers | Tags |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2017/01/06/1 | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| http://www.securityfocus.com/bid/95310 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2017-5193 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1410821 | Issue Tracking | |
| https://irssi.org/security/irssi_sa_2017_01.txt | x_refsource_CONFIRMPatchVendor Advisory | |
| https://lists.debian.org/debian-lts-announce/2017/12/msg00022.html | mailing-listx_refsource_MLISTThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-5193 | ||
| https://security.gentoo.org/glsa/201701-45 | vendor-advisoryx_refsource_GENTOOThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2017-5193 |
Change history (0)
No recorded changes yet.