Denial of service when processing ELF binaries in FreeBSD

Published: 2018-09-12
Severity Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2018-6924
CWE ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software FreeBSD Subscribe
Vendor FreeBSD Foundation

Security Advisory

This security advisory describes one medium risk vulnerability.

1) Input validation error

Severity: Medium

CVSSv3: 5.2 [CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2018-6924

CWE-ID: CWE-20 - Improper Input Validation

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in ELF header parser. A remote attacker can create a specially crafted binary, trick the use into executing it and disclose kernel memory or crash the kernel.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeBSD: 10.4, 11.0, 11.0, 11.1, 11.2

CPE External links

https://www.freebsd.org/security/advisories/FreeBSD-SA-18:12.elf.asc

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.