#VU17379 Information disclosure in FreeBSD


Published: 2019-02-06 | Updated: 2019-02-06

Vulnerability identifier: #VU17379

Vulnerability risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-5595

CWE-ID: CWE-200

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
FreeBSD
Operating systems & Components / Operating system

Vendor: FreeBSD Foundation

Description

The vulnerability allows a local attacker to gain access to potentially sensitive information.

The vulnerability exists due to the callee-save registers are used by kernel and for some of them (%r8, %r10, and for non-PTI configurations, %r9) the content is not sanitized before return from syscalls. A local attacker can gain unauthorized access to an address of some kernel data structure used in the syscall implementation.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FreeBSD: 10.1 - 12.0


External links
http://www.freebsd.org/security/advisories/FreeBSD-SA-19:01.syscall.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.


Latest bulletins with this vulnerability