CVE-2018-1071
Publication date 9 March 2018
Last updated 25 August 2025
Ubuntu priority
Description
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| zsh | ||
| 16.04 LTS xenial |
Fixed 5.1.1-1ubuntu2.2
|
|
| 14.04 LTS trusty |
Fixed 5.0.2-3ubuntu6.2
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
5.5 · Medium
|
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
References
Related Ubuntu Security Notices (USN)
- USN-3608-1
- Zsh vulnerabilities
- 27 March 2018