vulnwire
7.8high

CVE-2016-4557in critical feed2 exploits

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 st…

Published 10 y ago · modified 4 mo ago · JSON

CVSS
7.8
v3.1 · NVD
CISA KEV
No
not known exploited
EPSS
10.2%
percentile 96%
Public exploits
2
Exploit-DB

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.

Exploit prediction (EPSS)

10.20% probability of exploitation in the next 30 days, higher than 96% of all scored CVEs.

Exploits and detections

  • EDB-40759 Linux Kernel 4.4 (Ubuntu 16.04) - 'BPF' Local Privilege Escalation (Metasploit) · local · 2016-11-14
  • EDB-39772 Linux Kernel 4.4.x (Ubuntu 16.04) - 'double-fdput()' bpf(BPF_PROG_LOAD) Privilege Escalation · local · 2016-05-04

CVSS scores

Assigned byVersionScoreVector
NVD3.17.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD2.07.2AV:L/AC:L/Au:N/C:C/I:C/A:C

Classification

Technology feeds
Linux kernel (RSS, critical only)

References

  • bugs.debian.org /823603 · x_refsource_CONFIRM, x_transferred
  • lists.opensuse.org /opensuse-security-announce/2016-06/msg00044.html · vendor-advisory, x_refsource_SUSE, x_transferred
  • bugzilla.redhat.com /show_bug.cgi?id=1334307 · x_refsource_CONFIRM, x_transferred
  • github.com /torvalds/linux/commit/8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7 · x_refsource_CONFIRM, x_transferred
  • kernel.org /pub/linux/kernel/v4.x/ChangeLog-4.5.5 · x_refsource_CONFIRM, x_transferred
  • bugs.chromium.org /p/project-zero/issues/detail?id=808 · x_refsource_MISC, x_transferred
  • git.kernel.org /cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8358b02bf67d3a5d8a825070e1aa73f25fb2e · x_refsource_CONFIRM, x_transferred
  • openwall.com /lists/oss-security/2016/05/06/4 · mailing-list, x_refsource_MLIST, x_transferred
  • exploit-db.com /exploits/40759/ · exploit, x_refsource_EXPLOIT-DB, x_transferred

Sources

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.