CVE-2020-7043: fedoraproject fedora Improper Certificate Validation
CVSS: 9.1v3.1CriticalModified
AliasesUBUNTU-CVE-2020-7043DEBIAN-CVE-2020-7043
Published 27-02-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-7043 is a critical (CVSS 9.1) Improper Certificate Validation vulnerability in fedoraproject fedora. EPSS estimates a 2.76% chance of exploitation in the next 30 days, higher than 86% of scored vulnerabilities.
CVSS score
9.1/10
010
Critical · v3.1 (NVD)EPSS score
2.76%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 3 · Related 3Timeline
- 27-02-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
4 scores · 3 sources · 2 versionsCritical 9.1Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:NSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated9.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- OSV · DebianEcosystem advisory · calculated9.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Medium 6.4Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:NSourcesSingle source
EPSS trend
Probability
2.76%
Chance of exploitation in the next 30 days
Percentile
86%
Versus all other CVEs
30-day change
0.00 pp
From 2.76% on 19-09-2026
19-09-202619-10-2026
EPSS score2.76%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Opensuse2 products
- backports_sle15.0:sp1
- leapEOL15.1
Debian1 product
- openfortivpn< 1.12.0-1
Fedoraproject1 product
- fedoraEOL30 | 31 | 32
Openfortivpn_project1 product
- openfortivpn< 1.12.0
Ubuntu1 product
- openfortivpnAll versions (No fix recorded)
5 vendors · 6 products
References
11 links- github.com/adrienverge/openfortivpn/issues/536X Refsource MISCREPORTIssue TrackingThird Party Advisory
- github.com/adrienverge/openfortivpn/commit/cd9368c6a1b4ef91d77bb3fdbe2e5bc34aa6f4c4X Refsource MISCREPORTPatchThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-03/msg00009.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-03/msg00011.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- github.com/adrienverge/openfortivpn/commit/6328a070ddaab16faaf008cb9a8a62439c30f2a8X Refsource CONFIRMREPORTPatchThird Party Advisory
