Bug 1528516 (CVE-2017-16996) - CVE-2017-16996 kernel: memory corruption caused by BPF verifier bugs can allow for arbitrary code execution
Summary: CVE-2017-16996 kernel: memory corruption caused by BPF verifier bugs can allo...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2017-16996
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1528517 1528637
Blocks: 1528364
TreeView+ depends on / blocked
 
Reported: 2017-12-22 02:27 UTC by Sam Fowler
Modified: 2021-02-17 01:03 UTC (History)
44 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2019-07-12 13:04:38 UTC
Embargoed:

Attachments (Terms of Use)

Description Sam Fowler 2017-12-22 02:27:44 UTC 
Linux kernel built with the eBPF bpf(2) system call(CONFIG_BPF_SYSCALL) support
is vulnerable to an arbitrary memory r/w access issue. It could occur if a user supplied a malicious BPF program which results calculations error in eBPF verifier module.

An unprivileged user could use this flaw to escalate their privileges on a system.

Upstream patch
--------------
  -> https://git.kernel.org/linus/3db9128fcf02dcaafa3860a69a8a55d5529b6e30

References:
-----------
  -> http://seclists.org/oss-sec/2017/q4/429
  -> http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-16996
  -> http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-16996
  -> https://bugs.chromium.org/p/project-zero/issues/detail?id=1454

Mitigation:
-----------
  # echo 1 > /proc/sys/kernel/unprivileged_bpf_disabled
Comment 1 Sam Fowler 2017-12-22 02:28:42 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1528517]
Comment 6 Eric Christensen 2018-01-02 13:30:28 UTC 
Statement:

This issue does not affect the versions of the kernel package as shipped with Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2.
Comment 7 Jeremy Cline 2018-01-11 19:07:42 UTC 
This was fixed in Fedora in kernel-4.14.11 which pushed to stable on January 4,
2018
Comment 8 Product Security DevOps Team 2019-07-12 13:04:38 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2017-16996
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