Information disclosure in Strongswan
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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v2 metric
CVSS v2 base score 2.6 (Low). Vector: AV:N/AC:H/Au:N/C:P/I:N/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.020 (80.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000
Affected products
- Strongswan — versions 4.3.0, 4.3.1, 4.3.2
- Strongswan Vpn Client
- Canonical Ubuntu Linux — versions 14.04, 14.10, 15.04
- Debian Linux — versions 8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securitytracker.com/id/1032514 (vdb-entry)
- www.strongswan.org/blog/2015/06/08/strongswan-vulnerability-%28cve-2015-4171%29… (Patch, Vendor Advisory)
- lists.opensuse.org/opensuse-updates/2015-06/msg00040.html (vendor-advisory)
- www.openwall.com/lists/oss-security/2015/06/08/4 (mailing-list)
- www.suse.com/security/cve/CVE-2015-4171.html
- www.openwall.com/lists/oss-security/2015/05/29/6 (mailing-list)
- www.openwall.com/lists/oss-security/2015/05/29/7 (mailing-list)
- play.google.com/store/apps/details (Patch)
- www.ubuntu.com/usn/USN-2628-1 (vendor-advisory, Patch)
- www.debian.org/security/2015/dsa-3282 (vendor-advisory, Patch)
Frequently asked questions
- What is CVE-2015-4171?
- CVE-2015-4171 is a vulnerability in Strongswan, classified under Information Disclosure. Published 2015-06-10.
- Is CVE-2015-4171 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.