CVE-2020-15078: canonical ubuntu_linux
CVSS: 7.5v3.1HighModified
AliasesALPINE-CVE-2020-15078MGASA-2021-0302UBUNTU-CVE-2020-15078DEBIAN-CVE-2020-15078
Published 26-04-2021Last modified 04-08-2024
Vulnerability summary
CVE-2020-15078 is a high (CVSS 7.5) vulnerability in canonical ubuntu_linux. EPSS estimates a 4.91% chance of exploitation in the next 30 days, higher than 92% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
4.91%
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 7 · Related 6Timeline
- 26-04-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
OpenVPN 2.5.1 and earlier versions allows a remote attackers to bypass authentication and access control channel data on servers configured with deferred authentication, which can be used to potentially trigger further information leaks.
CVSS metrics
5 scores · 4 sources · 2 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NSourcesAll 4 agree
- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:N/A:NSourcesSingle source
EPSS trend
Probability
4.91%
Chance of exploitation in the next 30 days
Percentile
92%
Versus all other CVEs
30-day change
0.00 pp
From 4.91% on 20-09-2026
20-09-202620-10-2026
EPSS score4.91%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-305Authentication Bypass by Primary WeaknessThe authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.
- CWE-306Missing Authentication for Critical FunctionThe product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
Affected systems
Debian2 products
- openvpn< 2.5.1-2
- debian_linuxEOL9.0
Mageia2 products
- openvpn< 2.4.9-1.1.mga7
- openvpn< 2.5.0-2.1.mga8
Alpine1 product
- openvpn≥ 2.5.0, < 2.4.11-r0 | ≥ 2.5.0, < 2.5.2-r0
Canonical1 product
- ubuntu_linuxEOL18.04 | 20.04 | 20.10 | 21.04
Fedoraproject1 product
- fedoraEOL32 | 33 | 34
Openvpn1 product
- openvpn< 2.4.11 | ≥ 2.5.0, < 2.5.2
Ubuntu1 product
- openvpn< 2.4.4-2ubuntu1.5 | < 2.4.7-1ubuntu2.20.04.2
7 vendors · 9 products
References
16 links
lists.debian.org/debian-lts-announce/2022/05/msg00002.htmlMailing ListX Refsource MLISTThird Party Advisory