CVE-2018-5389
CVE-2018-5389

5.9MEDIUM

Key Information:

Vendor

Strongswan

Status
Strongswan
Vendor
CVE Published:
6 September 2018

What is CVE-2018-5389?

The Internet Key Exchange v1 main mode is vulnerable to offline dictionary or brute force attacks. Reusing a key pair across different versions and modes of IKE could lead to cross-protocol authentication bypasses. It is well known, that the aggressive mode of IKEv1 PSK is vulnerable to offline dictionary or brute force attacks. For the main mode, however, only an online attack against PSK authentication was thought to be feasible. This vulnerability could allow an attacker to recover a weak Pre-Shared Key or enable the impersonation of a victim host or network.

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Affected Version(s)

Strongswan 5.5.1

References

https://www.usenix.org/system/files/conference/usenixsecu...
https://www.kb.cert.org/vuls/id/857035
https://web-in-security.blogspot.com/2018/08/practical-di...

CVSS V3.1

Score:
5.9
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Thanks to Martin Grothe, Joerg Schwenk, and Dennis Felsch of the Ruhr-University Bochum, and Adam Czubak and Marcin Szymanek of the University of Opole for reporting this vulnerability.
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