- Vulnerabilities 87,944
Debian Security Advisory DSA 3398-1 (strongswan - security update)
Published: 2015-11-15 23:00:00
CVE Author: NIST National Vulnerability Database
CVSS Base Vector:
AV:N/AC:L/Au:N/C:N/I:P/A:N
Solution Type:
Vendor Patch
Detection Type:
Linux Distribution Package
Affected Versions:
strongswan on Debian Linux
Recommendations:
For the oldstable distribution (wheezy),
this problem has been fixed in version 4.5.2-1.5+deb7u8.
For the stable distribution (jessie), this problem has been fixed in
version 5.2.1-6+deb8u2.
For the testing distribution (stretch), this problem has been fixed
in version 5.3.3-3.
For the unstable distribution (sid), this problem has been fixed in
version 5.3.3-3.
We recommend that you upgrade your strongswan Linux Distribution Packages.
Summary:
Tobias Brunner found an authentication
bypass vulnerability in strongSwan, an IKE/IPsec suite.
Due to insufficient validation of its local state the server
implementation of the EAP-MSCHAPv2 protocol in the eap-mschapv2 plugin
can be tricked into successfully concluding the authentication without
providing valid credentials.
It's possible to recognize such attacks by looking at the server logs.
The following log message would be seen during the client
authentication:
EAP method EAP_MSCHAPV2 succeeded, no MSK established
Detection Method:
This check tests the installed software
version using the apt Linux Distribution Package manager.
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