HOMEVULNERABILITIESCVE-2017-15227
HIGH

CVE-2017-15227

CWE-416Published: October 22, 2017· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

Irssi before 1.0.5, while waiting for the channel synchronisation, may incorrectly fail to remove destroyed channels from the query list, resulting in use-after-free conditions when updating the state later on.

NVD Source

Technical Analysis

CVE-2017-15227 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

From a weakness classification perspective (CWE-416): Use-after-free vulnerabilities involve accessing memory after it has been freed, often enabling arbitrary code execution.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

irssi1 product(s)
irssi
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://openwall.com/lists/oss-security/2017/10/22/4
PATCHhttps://irssi.org/security/irssi_sa_2017_10.txt
PATCHhttp://openwall.com/lists/oss-security/2017/10/22/4
PATCHhttps://irssi.org/security/irssi_sa_2017_10.txt

All References (8)

→
http://openwall.com/lists/oss-security/2017/10/22/4Mailing List · Mitigation · Patch · Third Party Advisory
→
https://irssi.org/security/irssi_sa_2017_10.txtMitigation · Patch · Vendor Advisory
→
https://lists.debian.org/debian-lts-announce/2017/12/msg00022.html
→
https://www.debian.org/security/2017/dsa-4016
→
http://openwall.com/lists/oss-security/2017/10/22/4Mailing List · Mitigation · Patch · Third Party Advisory
→
https://irssi.org/security/irssi_sa_2017_10.txtMitigation · Patch · Vendor Advisory
→
https://lists.debian.org/debian-lts-announce/2017/12/msg00022.html
→
https://www.debian.org/security/2017/dsa-4016

Quick Facts

CVE IDCVE-2017-15227
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-416
CISA KEVNo
Affected1 vendor(s)
PublishedOct 22, 2017

Related CVEs (CWE-416)

CVE-2010-3252
10.0
CVE-2016-6082
10.0
CVE-2010-2300
10.0
CVE-2015-3107
10.0
CVE-2011-0982
10.0
CVE-2012-4218
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2017-15227 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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