a116e20c76
This is no real world security fix. The overflow could occur if too many layered subsystems are encountered because the function check_perms calls itself recursively. It would already take a misconfigured system for this to achieve it. Use an iterative approach by calling the do_check_perms in a loop instead of calling itself recursively. As a side note: At least GCC 13 optimized this code and already uses a jmp in its assembler code. I could only see the stack overflow by activating address sanitizer which prevented the optimization. Co-developed-by: Serge Hallyn <serge@hallyn.com> Signed-off-by: Samanta Navarro <ferivoz@riseup.net>
shadow-utils
Introduction
The shadow-utils package includes the necessary programs for converting UNIX password files to the shadow password format, plus programs for managing user and group accounts. The pwconv command converts passwords to the shadow password format. The pwunconv command unconverts shadow passwords and generates a passwd file (a standard UNIX password file). The pwck command checks the integrity of password and shadow files. The lastlog command prints out the last login times for all users. The useradd, userdel, and usermod commands are used for managing user accounts. The groupadd, groupdel, and groupmod commands are used for managing group accounts.
Sites
Contacts
There are several ways to contact us:
- the general discussion mailing list
- the #shadow IRC channel on libera.chat:
- irc://irc.libera.chat/shadow
Mailing archives
- the general discussion mailing list archive
- the commit mailing list archive, only used for historical purposes
Contributions
Contributions are welcome. Follow the guidelines before posting any patches.
Authors and maintainers
Authors and maintainers are listed in AUTHORS.md.