CVE-2017-17862 - log back

CVE-2017-17862 created at 25 Sep 2019 19:31:40
Severity
+ Medium
Remote
+ Local
Type
+ Denial of service
Description
+ It has been discovered that kernel/bpf/verifier.c in the Linux kernel before 4.14.9 and 4.9.72 ignore unreachable code, even though it would still be processed by JIT compilers. This behavior, also considered an improper branch-pruning logic issue, could possibly be used by local users for denial of service.
References
+ https://bugs.chromium.org/p/project-zero/issues/detail?id=1454
+ http://www.openwall.com/lists/oss-security/2017/12/21/2
+ https://git.kernel.org/linus/c131187db2d3fa2f8bf32fdf4e9a4ef805168467
Notes
+ Workaround by disabling unprivileged bpf:
+ sysctl -w kernel.unprivileged_bpf_disabled=1