storeBackup.pl in storeBackup through 3.5 relies on the /tmp/storeBackup.lock pathname,...

Vulnerability Description

storeBackup.pl in storeBackup through 3.5 relies on the /tmp/storeBackup.lock pathname, which allows symlink attacks that possibly lead to privilege escalation. (Local users can also create a plain file named /tmp/storeBackup.lock to block use of storeBackup until an admin manually deletes that file.)

References

• https://bugzilla.suse.com/show_bug.cgi?id=CVE-2020-7040
• http://www.openwall.com/lists/oss-security/2020/01/20/3
• https://seclists.org/oss-sec/2020/q1/20
• http://www.openwall.com/lists/oss-security/2020/01/21/2
• http://www.openwall.com/lists/oss-security/2020/01/22/2
• http://www.openwall.com/lists/oss-security/2020/01/22/3
• http://www.openwall.com/lists/oss-security/2020/01/23/1
• http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00054.html
• https://lists.debian.org/debian-lts-announce/2020/02/msg00003.html
• https://usn.ubuntu.com/4508-1/