Vulnerability identifier: #VU7555

Vulnerability risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-10981

CWE-ID: CWE-401

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
FreeRADIUS
Server applications / Directory software, identity management

Vendor: FreeRADIUS Server Project

Description

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

The vulnerability exists due to memory leak in fr_dhcp_decode() function when processing DHCP packets. A remote attacker on local network can send specially crafted DHCP packets with malicious options  to vulnerable system and trigger denial of service attack.

Mitigation
Update to version 2.2.10.

Vulnerable software versions

FreeRADIUS: 2.2.0 - 2.2.9

---

External links
http://freeradius.org/security/fuzzer-2017.html#FR-GV-204

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.