CVE-2020-3811: canonical ubuntu_linux Improper Initialization
CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2020-3811
Published 26-05-2020Last modified 17-09-2024
Vulnerability summary
CVE-2020-3811 is a high (CVSS 7.5) Improper Initialization vulnerability in canonical ubuntu_linux. EPSS estimates a 1.81% chance of exploitation in the next 30 days, higher than 78.3% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
1.81%
0%100%
Low · +0.04 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 4 · Related 2Timeline
- 26-05-2020PublishedVulnerability first disclosed.
- 17-09-2024Last modifiedVulnerability information updated.
Description
qmail-verify as used in netqmail 1.06 is prone to a mail-address verification bypass vulnerability.
CVSS metrics
3 scores · 2 sources · 2 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NSourcesAll 2 agree
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:P/A:NSourcesSingle source
EPSS trend
Probability
1.81%
Chance of exploitation in the next 30 days
Percentile
78%
Versus all other CVEs
30-day change
+0.04 pp
From 1.77% on 18-09-2026
18-09-202618-10-2026
EPSS score1.81%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (openwall.com)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-665Improper InitializationThe product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used.
- CWE-863Incorrect AuthorizationThe product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
Affected systems
Debian2 products
- debian_linuxEOL9.0 | 10.0
- netqmail1.06
Canonical1 product
- ubuntu_linuxEOL20.04
Netqmail1 product
- netqmail1.06
Ubuntu1 product
- netqmail< 1.06-6.2~deb10u1build0.14.04.1+esm1 | < 1.06-6.2~deb10u1build0.16.04.1 | < 1.06-6.2~deb10u1build0.18.04.1 | < 1.06-6.2~deb10u1build0.20.04.1
4 vendors · 5 products
References
9 links- www.openwall.com/lists/oss-security/2020/05/19/8X Refsource MISCREPORTExploitMailing ListPatchThird Party Advisory
- lists.debian.org/debian-lts-announce/2020/06/msg00002.htmlMailing ListX Refsource MLISTThird Party Advisory