Description
In Zsh before 5.8, attackers able to execute commands can regain privileges dropped by the --no-PRIVILEGED option. Zsh fails to overwrite the saved uid, so the original privileges can be restored by executing MODULE_PATH=/dir/with/module zmodload with a module that calls setuid().
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
n/a n/a
n/aaffected
References
- http://zsh.sourceforge.net/releases.html ↗
- https://github.com/XMB5/zsh-privileged-upgrade ↗
- https://www.zsh.org/mla/zsh-announce/141 ↗
- https://lists.debian.org/debian-lts-announce/2020/03/msg00004.html ↗
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FP64FFIZI2CKQOEAOI5A72PVQULE7ZZC/ ↗
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PN5V7MPHRRP7QNHOEK56S7QGRU53WUN6/ ↗
- https://security.gentoo.org/glsa/202003-55 ↗
- https://support.apple.com/kb/HT211170 ↗
- https://support.apple.com/kb/HT211175 ↗
- https://support.apple.com/kb/HT211171 ↗
- https://support.apple.com/kb/HT211168 ↗
- http://seclists.org/fulldisclosure/2020/May/49 ↗
- http://seclists.org/fulldisclosure/2020/May/55 ↗
- http://seclists.org/fulldisclosure/2020/May/53 ↗
- http://seclists.org/fulldisclosure/2020/May/59 ↗
- https://support.apple.com/HT211168 ↗
- https://support.apple.com/HT211170 ↗
- https://support.apple.com/HT211171 ↗
- https://support.apple.com/HT211175 ↗
- https://lists.debian.org/debian-lts-announce/2020/12/msg00000.html ↗