CVE-2017-2671

Severity

49%

Complexity

39%

Confidentiality

115%

The ping_unhash function in net/ipv4/ping.c in the Linux kernel through 4.10.8 is too late in obtaining a certain lock and consequently cannot ensure that disconnect function calls are safe, which allows local users to cause a denial of service (panic) by leveraging access to the protocol value of IPPROTO_ICMP in a socket system call.

The ping_unhash function in net/ipv4/ping.c in the Linux kernel through 4.10.8 is too late in obtaining a certain lock and consequently cannot ensure that disconnect function calls are safe, which allows local users to cause a denial of service (panic) by leveraging access to the protocol value of IPPROTO_ICMP in a socket system call.

CVSS 3.0 Base Score 5.5. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

CVSS 2.0 Base Score 4.9. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:N/I:N/A:C).

Overview

First reported 7 years ago

2017-04-05 06:59:00

Last updated 5 years ago

2019-10-03 00:03:00

Affected Software

Linux Kernel

References

[oss-security] 20170404 Re: Linux kernel ping socket / AF_LLC connect() sin_family race

Mailing List, Third Party Advisory

97407

Third Party Advisory, VDB Entry

RHSA-2017:1842

RHSA-2017:2077

RHSA-2017:2669

RHSA-2018:1854

https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/net/ipv4/ping.c?id=43a6684519ab0a6c52024b5e25322476cabad893

Issue Tracking, Patch, Third Party Advisory

https://github.com/danieljiang0415/android_kernel_crash_poc

Third Party Advisory

https://github.com/torvalds/linux/commit/43a6684519ab0a6c52024b5e25322476cabad893

Issue Tracking, Patch, Third Party Advisory

https://twitter.com/danieljiang0415/status/845116665184497664

Third Party Advisory

USN-3754-1

42135

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