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CVE-2018-5389

Date: September 6, 2018

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.

Severity Score

Related Resources (9)

https://www.kb.cert.org/vuls/id/857035
https://blogs.cisco.com/security/great-cipher-but-where-did-you-get-that-key
https://web-in-security.blogspot.com/2018/08/practical-dictionary-attack-on-ipsec-ike.html
https://security-tracker.debian.org/tracker/CVE-2018-5389
https://nvd.nist.gov/vuln/detail/CVE-2018-5389
https://www.usenix.org/system/files/conference/usenixsecurity18/sec18-felsch.pdf
https://access.redhat.com/security/cve/CVE-2018-5389
https://my.f5.com/manage/s/article/K42378447
https://www.mend.io/vulnerability-database/CVE-2018-5389

Severity Score

Weakness Type (CWE)

Weak Password Requirements

CWE-521

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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