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:
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
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.