Vulnerability in Openfortivpn Project
CVE-2020-7043
An issue was discovered in openfortivpn 1.11.0 when used with OpenSSL before 1.0.2. tunnel.c mishandles certificate validation because hostname comparisons do not consider '\0' characters, as demonstrated by a good.example.com\x00evil.example.com attack.
Vulnerability class: Improper Certificate Validation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.028 (85.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.028 · newest: 0.028 · change: 0.000
Affected products
- Openfortivpn Project
- OpenSSL
- Fedoraproject Fedora — versions 30, 31, 32
- openSUSE Backports Sle — versions 15.0
- openSUSE Leap — versions 15.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/adrienverge/openfortivpn/issues/536 (Third Party Advisory, Issue Tracking)
- github.com/adrienverge/openfortivpn/commit/cd9368c6a1b4ef91d77bb3fdbe2e5bc34aa6… (Patch, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-03/msg00009.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-03/msg00011.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- github.com/adrienverge/openfortivpn/commit/6328a070ddaab16faaf008cb9a8a62439c30… (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-7043?
- CVE-2020-7043 is a critical-severity vulnerability in Openfortivpn Project, classified under Improper Certificate Validation. CVSS score: 9.1/10. Published 2020-02-27.
- How severe is CVE-2020-7043?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2020-7043 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.