Out-of-bounds write in Linux kernel

1) Out-of-bounds write

EUVDB-ID: #VU28377

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-2018-10883

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a local authenticated user to perform a denial of service (DoS) attack.

A flaw was found in the Linux kernel's ext4 filesystem. A local user can cause an out-of-bounds write in jbd2_journal_dirty_metadata(), a denial of service, and a system crash by mounting and operating on a crafted ext4 filesystem image.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 4.4 - 4.17.5

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:4.4.163:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.134:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.17.5:*:*:*:*:*:*:*

External links

https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.55
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.17.6
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.140
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.135
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.164

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.