#VU13024 Buffer underflow in strongSwan - CVE-2018-5388

Vulnerability identifier: #VU13024

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-5388

CWE-ID: CWE-124

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
strongSwan
Server applications / Encryption software

Vendor: strongswan.org

Description

The vulnerability allows a local attacker to cause DoS condition on the target system.

The vulnerability exists due to buffer underflow stroke_socket.c while improper checking of packet length. A local attacker can submit specially crafted packets, trigger resource exhaustion and cause the service to crash while reading from the socket.

Mitigation
Update to version 5.6.2.

Vulnerable software versions

strongSwan: 5.0.0 - 5.6.1

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=1581867

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Q & A

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.