#VU7557 Out-of-bounds read in FreeRADIUS - CVE-2017-10983

Vulnerability identifier: #VU7557

Vulnerability risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-10983

CWE-ID: CWE-125

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 option 63 with non-zero contents to vulnerable system and trigger denial of service attack.

Mitigation
Update to version 2.2.10.

Vulnerable software versions

FreeRADIUS: 2.2.0 - 3.0.14

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External links
https://freeradius.org/security/fuzzer-2017.html#FR-GV-206

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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.