National Vulnerability Database

National Vulnerability Database

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    Vulnerabilities Detail

CVE-2017-2671 Detail

Current Description

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.

Source:  MITRE
Description Last Modified:  04/05/2017
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 5.5 MEDIUM
Vector: AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H (V3 legend)
Impact Score: 3.6
Exploitability Score: 1.8

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 4.9 MEDIUM
Vector: (AV:L/AC:L/Au:N/C:N/I:N/A:C) (V2 legend)
Impact Subscore: 6.9
Exploitability Subscore: 3.9

Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Complete
Additional Information:
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://openwall.com/lists/oss-security/2017/04/04/8 Mailing List Third Party Advisory
http://www.securityfocus.com/bid/97407 Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2017:1842
https://access.redhat.com/errata/RHSA-2017:2077
https://access.redhat.com/errata/RHSA-2017:2669
https://access.redhat.com/errata/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
https://usn.ubuntu.com/3754-1/
https://www.exploit-db.com/exploits/42135/

Technical Details

Vulnerability Type (View All)

  • Improper Access Control (CWE-284)

Change History

7 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-2671
NVD Published Date:
04/05/2017
NVD Last Modified:
08/24/2018