Medium severity5.9NVD Advisory· Published Aug 15, 2018· Updated Jun 17, 2026

CVE-2018-8753

Description

The IKEv1 implementation in Clavister cOS Core before 11.00.11, 11.20.xx before 11.20.06, and 12.00.xx before 12.00.09 allows remote attackers to decrypt RSA-encrypted nonces by leveraging a Bleichenbacher attack.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Clavister/Cos Core2 versions
cpe:2.3:a:clavister:cos_core:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:clavister:cos_core:*:*:*:*:*:*:*:*range: <11.00.11
- (no CPE)range: <11.00.11, <11.20.06, <12.00.09

Patches

Vulnerability mechanics

References

web-in-security.blogspot.com/2018/08/practical-bleichenbacher-attacks-on-ipsec-ike.htmlnvdThird Party Advisory
www.clavister.com/advisories/security/clav-sa-0157-bleichenbacher-oracle-vulnerability-in-ikev1nvdVendor Advisory

News mentions

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cvss	0.384
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000