Weak Password Requirements Affecting libreswan package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-ECHOLATEST-LIBRESWAN-18321503
- published27 Jul 2026
- disclosed6 Sept 2018
Introduced: 6 Sep 2018
CVE-2018-5389 (opens in a new tab)How to fix?
There is no fixed version for Echo:latest libreswan.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libreswan package and not the libreswan package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
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.
References
- https://advisory.echohq.com/cve/CVE-2018-5389
- https://blogs.cisco.com/security/great-cipher-but-where-did-you-get-that-key
- https://my.f5.com/manage/s/article/K42378447
- https://web-in-security.blogspot.com/2018/08/practical-dictionary-attack-on-ipsec-ike.html
- https://www.kb.cert.org/vuls/id/857035
- https://www.usenix.org/system/files/conference/usenixsecurity18/sec18-felsch.pdf