#VU13600 Buffer over-read in Linux kernel - CVE-2018-13098

Vulnerability identifier: #VU13600

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-13098

CWE-ID: CWE-125

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to an out-of-bounds read in fs/f2fs/inode.c file that occurs for a modified f2fs filesystem image in which FI_EXTRA_ATTR is set in an inode.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 4.17.1 - 4.17.3

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External links
https://bugzilla.kernel.org/show_bug.cgi?id=200173
https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git/commit/?h=f2fs-dev&id=3468867...

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.