The nfs-utils package in SUSE Linux Enterprise Server 12 before and including version 1.3.0-34.18.1 and in SUSE Linux Enterprise Server 15 before and including version 2.1.1-6.10.2 the directory /var/lib/nfs is owned by statd:nogroup. This directory contains files owned and managed by root. If statd is compromised, it can therefore trick processes running with root privileges into creating/overwriting files anywhere on the system if fs.protected_symlinks is not set

References

• https://nvd.nist.gov/vuln/detail/CVE-2019-3689
• https://bugzilla.suse.com/show_bug.cgi?id=1150733
• https://git.linux-nfs.org/?p=steved/nfs-utils.git;a=commitdiff;h=fee2cc29e888f2ced6a76990923aef19d326dc0e
• https://lists.debian.org/debian-lts-announce/2019/10/msg00026.html
• https://usn.ubuntu.com/4400-1/
• http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00071.html
• http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00006.html