zsh through version 5.4.2 is vulnerable to a stack-based buffer overflow in the exec.c:hashcmd() function. A local attacker could exploit this to cause a denial of service.
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
The product writes data past the end, or before the beginning, of the intended buffer.
| Link | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1553531 | issue tracking third party advisory |
| https://usn.ubuntu.com/3608-1/ | third party advisory vendor advisory |
| http://www.securityfocus.com/bid/103359 | vdb entry third party advisory |
| https://security.gentoo.org/glsa/201805-10 | third party advisory vendor advisory |
| https://lists.debian.org/debian-lts-announce/2018/03/msg00038.html | third party advisory mailing list |
| https://access.redhat.com/errata/RHSA-2018:3073 | third party advisory vendor advisory |
| https://lists.debian.org/debian-lts-announce/2020/12/msg00000.html | mailing list |