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 a server is disconnected during netsplits. NOTE: this issue exists because of an incomplete fix for CVE-2017-7191.
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
| Link | Tags |
|---|---|
| https://www.debian.org/security/2018/dsa-4162 | third party advisory vendor advisory |
| https://irssi.org/security/irssi_sa_2018_02.txt | mitigation vendor advisory |
| http://openwall.com/lists/oss-security/2018/02/15/1 | mailing list |
| https://usn.ubuntu.com/3590-1/ | third party advisory vendor advisory |
| https://usn.ubuntu.com/4046-1/ | vendor advisory |