PRIOn knowledge basePRION:CVE-2016-4557Design/Logic Flaw
The replace_map_fd_with_map_ptr function in kernel/bpf/verifier.c in the Linux kernel before 4.5.5 does not properly maintain an fd data structure, which allows local users to gain privileges or cause a denial of service (use-after-free) via crafted BPF instructions that reference an incorrect file descriptor.
| CPE | Name | Operator | Version |
|---|---|---|---|
| linux_kernel | ge | 4.4 | |
| linux_kernel | lt | 4.4.11 | |
| linux_kernel | ge | 4.5 | |
| linux_kernel | lt | 4.5.5 |
References
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7
lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html
www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5
www.openwall.com/lists/oss-security/2016/05/06/4
bugs.chromium.org/p/project-zero/issues/detail?id=808
bugs.debian.org/823603
bugzilla.redhat.com/show_bug.cgi?id=1334307
github.com/torvalds/linux/commit/8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7
www.exploit-db.com/exploits/40759/
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