Stack out-of-bounds read in file (Alpine package)

1) Stack out-of-bounds read

EUVDB-ID: #VU17821

Risk: Low

CVSSv3.1: 4.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-8905

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

Exploit availability: No

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information or perform a denial of service (DoS) attack.

The vulnerability exists due to stack-based buffer over-read in the do_core_note function, related to file_printable. A remote attacker can trick the victim into executing a file that submits malicious input to the targeted system with the file command, trigger memory corruption and gain access to arbitrary data or perform a denial of service attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

file (Alpine package): 5.32-r0

External links

http://git.alpinelinux.org/aports/commit/?id=9746bba8b1ef891f7af4cc454546ad787884bc84
http://git.alpinelinux.org/aports/commit/?id=9ca7ff46c112e6c03d5874540a286e6e45f1b510
http://git.alpinelinux.org/aports/commit/?id=dc538f4f70353a02d01dac905fb662412befffbe
http://git.alpinelinux.org/aports/commit/?id=61e481480f83fcb6df33de7da9d782f0c229e945
http://git.alpinelinux.org/aports/commit/?id=e417e312a2460b385bd5003089c29af549f19b14
http://git.alpinelinux.org/aports/commit/?id=8b903beb77c68c97ba0aa36e58b6750edc06ca78
http://git.alpinelinux.org/aports/commit/?id=27d87cf2365bff16337278a4e93a16df7f33f2e4

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.