Arbitrary code execution in FreeBSD



Published: 2016-10-10 | Updated: 2016-10-11
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID N/A
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Operating systems & Components / Operating system

Vendor FreeBSD Foundation

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Arbitrary code execution

EUVDB-ID: #VU824

Risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote unauthenticated user to cause arbitrary code execution on the target system.
The weakness occurs in bspatch and exists due to insufficient input validation. By creating and sending a specially crafted patch file attackers can trigger a heap overflow and execute arbitrary code.
Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.

Mitigation

Update patched versions
https://security.FreeBSD.org/patches/SA-16:29/bspatch.patch

Vulnerable software versions

FreeBSD: 9.3 - 11.0

External links

http://www.freebsd.org/security/advisories/FreeBSD-SA-16:29.bspatch.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.



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