An issue was discovered in Irssi before 1.0.7 and 1.1.x before 1.1.1. There is a use-after-free when SASL messages are received in an unexpected order...

References

• advisory http://openwall.com/lists/oss-security/2018/02/15/1
• advisory https://irssi.org/security/irssi_sa_2018_02.txt
• advisory https://usn.ubuntu.com/3590-1/
• advisory https://www.debian.org/security/2018/dsa-4162