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CVE-2015-4171

UnknownEPSS 2.03%

Last modified

CVE-2015-4171 is a vulnerability of currently unknown severity. strongSwan 4.3.0 through 5.x before 5.3.2 and strongSwan VPN Client before 1.4.6, when using EAP or pre-shared keys for authenticating an IKEv2 connection, does not enforce server authentication restrictions until the entire authentication process is complete, which allows remote servers to obtain credentials by using a valid certificate and then reading the responses.. EPSS estimates a 2.03% chance of exploitation in the next 30 days.

Description

strongSwan 4.3.0 through 5.x before 5.3.2 and strongSwan VPN Client before 1.4.6, when using EAP or pre-shared keys for authenticating an IKEv2 connection, does not enforce server authentication restrictions until the entire authentication process is complete, which allows remote servers to obtain credentials by using a valid certificate and then reading the responses.

Metrics

EPSS Probability
2.03%

78.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
StrongswanStrongswan Vpn Client<= 1.4.5
CanonicalUbuntu Linux14.04
CanonicalUbuntu Linux14.10
CanonicalUbuntu Linux15.04
DebianDebian Linux8.0
StrongswanStrongswan4.3.0
StrongswanStrongswan4.3.1
StrongswanStrongswan4.3.2
StrongswanStrongswan4.3.3
StrongswanStrongswan4.3.4
StrongswanStrongswan4.3.5
StrongswanStrongswan4.3.6
StrongswanStrongswan4.3.7
StrongswanStrongswan4.4.0
StrongswanStrongswan4.4.1
StrongswanStrongswan4.5.0
StrongswanStrongswan4.5.1
StrongswanStrongswan4.5.2
StrongswanStrongswan4.5.3
StrongswanStrongswan4.6.0
StrongswanStrongswan4.6.1
StrongswanStrongswan4.6.2
StrongswanStrongswan4.6.3
StrongswanStrongswan4.6.4
StrongswanStrongswan5.0.0
StrongswanStrongswan5.0.1
StrongswanStrongswan5.0.2
StrongswanStrongswan5.0.3
StrongswanStrongswan5.0.4
StrongswanStrongswan5.1.0
StrongswanStrongswan5.1.1
StrongswanStrongswan5.1.2
StrongswanStrongswan5.1.3
StrongswanStrongswan5.2.0
StrongswanStrongswan5.2.1
StrongswanStrongswan5.2.2
StrongswanStrongswan5.2.3
StrongswanStrongswan5.3.0
StrongswanStrongswan5.3.1

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2015-4171?
strongSwan 4.3.0 through 5.x before 5.3.2 and strongSwan VPN Client before 1.4.6, when using EAP or pre-shared keys for authenticating an IKEv2 connection, does not enforce server authentication restrictions until the entire authentication process is complete, which allows remote servers to obtain credentials by using a valid certificate and then reading the responses.
How severe is CVE-2015-4171?
Severity scoring for CVE-2015-4171 is pending analysis. The EPSS model estimates a 2.03% probability of exploitation in the next 30 days.
How do I fix CVE-2015-4171?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2015-4171?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST