Out-of-bounds read in Linux kernel

1) Out-of-bounds read

EUVDB-ID: #VU28380

Risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-10877

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local privileged user to execute arbitrary code.

Linux kernel ext4 filesystem is vulnerable to an out-of-bound access in the ext4_ext_drop_refs() function when 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:4.4.139:*:*:*:*:*:*:*
• 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

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.