What’s Vulnerable › Vulnerabilities

CVE-2017-15721

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-10-22 · updated 2026-06-17
• Weakness: CWE-476

Description

In Irssi before 1.0.5, certain incorrectly formatted DCC CTCP messages could cause a NULL pointer dereference. This is a separate, but similar, issue relative to CVE-2017-9468.

Affected products

• Debian Linux: 7.0, 8.0, 9.0
• Irssi: through 1.0.4

References

• http://openwall.com/lists/oss-security/2017/10/22/4
• https://irssi.org/security/irssi_sa_2017_10.txt
• 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/2017/10/22/4
• https://irssi.org/security/irssi_sa_2017_10.txt
• https://lists.debian.org/debian-lts-announce/2017/12/msg00022.html
• https://www.debian.org/security/2017/dsa-4016

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