CVE-2018-5389 — The Internet Key Exchange v1 main mode is vulnerable to offline dictionary or br
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 vulner
Published
2018-09-06T21:00:00.000Z
Last modified
2024-08-05T05:33:44.296Z
01What is this vulnerability?
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…
02Affected products
| Vendor | Product | Versions |
|---|
| strongSwan | Strongswan | 5.5.1 |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2018-09-06T21:00:00.000Z
- Last modified: 2024-08-05T05:33:44.296Z
09References
- www.usenix.org — https://www.usenix.org/system/files/conference/usenixsecurity18/sec18-felsch.pdf
- www.kb.cert.org — https://www.kb.cert.org/vuls/id/857035
- web-in-security.blogspot.com — https://web-in-security.blogspot.com/2018/08/practical-dictionary-attack-on-ipse…
- blogs.cisco.com — https://blogs.cisco.com/security/great-cipher-but-where-did-you-get-that-key
- my.f5.com — https://my.f5.com/manage/s/article/K42378447
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