Buffer overflow in NetBSD

1) Buffer overflow

EUVDB-ID: #VU8450

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-120 - Buffer overflow

Exploit availability: No

Description

The vulnerability allows a local attacker to execute arbitrary code on the target system.

The weakness exists due to insufficient bounds checking when reading or writing the color map using the WSDISPLAYIO_GETCMAP and WSDISPLAYIO_PUTCMAP ioctls. A local attacker can use a wscons terminal, trigger a buffer overflow and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Install update from vendor's website.

Vulnerable software versions

NetBSD: 6.0 - 7.0.2

External links

http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2017-004.txt.asc

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.