CVE-2018-12232 : In net/socket.c in the Linux kernel through 4.17.1, there is a race condition be

In net/socket.c in the Linux kernel through 4.17.1, there is a race condition between fchownat and close in cases where they target the same socket file descriptor, related to the sock_close and sockfs_setattr functions. fchownat does not increment the file descriptor reference count, which allows close to set the socket to NULL during fchownat's execution, leading to a NULL pointer dereference and system crash.

Published 2018-06-12 12:29:00

Updated 2018-10-31 10:30:57

Source MITRE

View at NVD, CVE.org

Vulnerability category: Memory Corruption

Products affected by CVE-2018-12232

Linux » Linux Kernel
Versions up to, including, (<=) 4.17.1
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Matching versions

Threat overview for CVE-2018-12232

Top countries where our scanners detected CVE-2018-12232

Top open port discovered on systems with this issue 49152

IPs affected by CVE-2018-12232 25,060

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2018-12232!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2018-12232

EPSS FAQ

0.59%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 78 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2018-12232

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.1	HIGH	AV:N/AC:M/Au:N/C:N/I:N/A:C	8.6	6.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Complete
5.9	MEDIUM	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H	2.2	3.6	NIST
Attack Vector: Network Attack Complexity: High Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2018-12232

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2018-12232

http://www.securityfocus.com/bid/104453

Linux Kernel CVE-2018-12232 Local Denial of Service Vulnerability
Third Party Advisory;VDB Entry
https://usn.ubuntu.com/3752-2/

USN-3752-2: Linux kernel (HWE) vulnerabilities | Ubuntu security notices

CVEs referencing this url
https://github.com/torvalds/linux/commit/6d8c50dcb029872b298eea68cc6209c866fd3e14

socket: close race condition between sock_close() and sockfs_setattr() · torvalds/linux@6d8c50d · GitHub
Patch;Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2948

RHSA-2018:2948 - Security Advisory - Red Hat Customer Portal

CVEs referencing this url
https://usn.ubuntu.com/3752-1/

USN-3752-1: Linux kernel vulnerabilities | Ubuntu security notices

CVEs referencing this url
https://lkml.org/lkml/2018/6/5/14

LKML: shankarapailoor: general protection fault in sockfs_setattr
Third Party Advisory
https://usn.ubuntu.com/3752-3/

USN-3752-3: Linux kernel (Azure, GCP, OEM) vulnerabilities | Ubuntu security notices

CVEs referencing this url
https://patchwork.ozlabs.org/patch/926519/

[net] socket: close race condition between sock_close() and sockfs_setattr() - Patchwork
Patch;Third Party Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6d8c50dcb029872b298eea68cc6209c866fd3e14

kernel/git/torvalds/linux.git - Linux kernel source tree
Patch;Third Party Advisory