CVE-2018-1100

zsh through version 5.4.2 is vulnerable to a stack-based buffer overflow in the utils.c:checkmailpath function. A local attacker could exploit this to execute arbitrary code in the context of another user.

These are all security issues fixed in the zsh-5.8-7.7 package on the GA media of openSUSE Tumbleweed.

This update for zsh fixes the following issues:

• CVE-2018-1100: Fixed a buffer overflow in utils.c:checkmailpath() that could lead to local arbitrary code execution ( bsc#1089030)

This update for zsh to version 5.5 fixes the following issues:

Security issues fixed:

• CVE-2018-1100: Fixes a buffer overflow in utils.c:checkmailpath() that can lead to local arbitrary code execution (bsc#1089030)
• CVE-2018-1071: Fixed a stack-based buffer overflow in exec.c:hashcmd() (bsc#1084656)
• CVE-2018-1083: Fixed a stack-based buffer overflow in gen_matches_files() at compctl.c (bsc#1087026)

Non-security issues fixed:

• The effect of the NO_INTERACTIVE_COMMENTS option extends into $(...) and ... command substitutions when used on the command line.
• The 'exec' and 'command' precommand modifiers, and options to them, are now parsed after parameter expansion.
• Functions executed by ZLE widgets no longer have their standard input closed, but redirected from /dev/null instead.
• There is an option WARN_NESTED_VAR, a companion to the existing WARN_CREATE_GLOBAL that causes a warning if a function updates a variable from an enclosing scope without using typeset -g.
• zmodload now has an option -s to be silent on a failure to find a module but still print other errors.

This update for zsh fixes the following issues:

• CVE-2021-45444: Fixed a vulnerability where arbitrary shell commands could be executed related to prompt expansion (bsc#1196435).
• CVE-2019-20044: Fixed a vulnerability where shell privileges would not be properly dropped when unsetting the PRIVILEGED option (bsc#1163882).
• CVE-2018-1100: Fixed a potential code execution via a stack-based buffer overflow in utils.c:checkmailpath() (bsc#1089030).

It was discovered that Zsh incorrectly handled certain scripts. An attacker could possibly use this issue to execute arbitrary code. (CVE-2018-0502, CVE-2018-13259)

Richard Maciel Costa discovered that Zsh incorrectly handled certain scripts. An attacker could possibly use this issue to execute arbitrary code. (CVE-2018-1100)