#VU13599 Buffer over-read in Linux kernel - CVE-2018-13099

Vulnerability identifier: #VU13599

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-2018-13099

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/inline.c file that occurs for a modified f2fs filesystem image in which an inline inode contains an invalid reserved blkaddr.

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=200179
https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git/commit/?h=f2fs-dev&id=cc60e90...
https://sourceforge.net/p/linux-f2fs/mailman/message/36356878/

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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.