CVE-2020-3812
qmail-verify as used in netqmail 1.06 is prone to an information disclosure vulnerability. A...
qmail-verify as used in netqmail 1.06 is prone to an information disclosure vulnerability. A local attacker can test for the existence of files and directories anywhere in the filesystem because qmail-verify runs as root and tests for the existence of files in the attacker's home directory, without dropping its privileges first.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
5.5
qmail-verify as used in netqmail 1.06 is prone to an information disclosure vulnerability. A local attacker can test for the existence of files and directories anywhere in the filesystem because qmail-verify runs as root and tests for the existence of files in the attacker's home directory, without dropping its privileges first.
- Record
CVE-2020-3812- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 2.1 Low
AV:L/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-269
- Updated
- 2026-11-02
CVE List No score
qmail-verify as used in netqmail 1.06 is prone to an information disclosure vulnerability. A local attacker can test for the existence of files and directories anywhere in the filesystem because qmail-verify runs as root and tests for the existence of files in the attacker's home directory, without dropping its privileges first.
- Record
CVE-2020-3812- Updated
- 2026-11-02
EUVDEUVD-2020-25077 No score
qmail-verify as used in netqmail 1.06 is prone to an information disclosure vulnerability. A local attacker can test for the existence of files and directories anywhere in the filesystem because qmail-verify runs as root and tests for the existence of files in the attacker's home directory, without dropping its privileges first.
- Record
EUVD-2020-25077- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-w98m-2722-xcvc
5.5
qmail-verify as used in netqmail 1.06 is prone to an information disclosure vulnerability. A...
qmail-verify as used in netqmail 1.06 is prone to an information disclosure vulnerability. A local attacker can test for the existence of files and directories anywhere in the filesystem because qmail-verify runs as root and tests for the existence of files in the attacker's home directory, without dropping its privileges first.
- Record
GHSA-w98m-2722-xcvc- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-200, CWE-269
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-3812
5.5
qmail-verify as used in netqmail 1.06 is prone to an information disclosure vulnerability. A local attacker can test for the existence of files and directories anywhere in the filesystem because qmail-verify runs as root and tests for the existence of files in the attacker's home directory, without dropping its privileges first.
- Record
UBUNTU-CVE-2020-3812- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVUSN-4556-1 No score
netqmail vulnerabilities
It was discovered that netqmail did not properly handle certain input. Both remote and local attackers could use this vulnerability to cause netqmail to crash or execute arbitrary code. (CVE-2005-1513, CVE-2005-1514, CVE-2005-1515)
It was discovered that netqmail did not properly handle certain input when validating email addresses. An attacker could use this to bypass email address validation. (CVE-2020-3811)
It was discovered that netqmail did not properly handle certain input when validating email addresses. An attacker could use this vulnerability to cause netqmail to disclose sensitive information. (CVE-2020-3812)
- Record
USN-4556-1- Updated
- 2026-11-02
OSVUSN-4621-1 No score
netqmail vulnerabilities
It was discovered that netqmail did not properly handle certain input. Both remote and local attackers could use this vulnerability to cause netqmail to crash or execute arbitrary code. (CVE-2005-1513, CVE-2005-1514, CVE-2005-1515)
It was discovered that netqmail did not properly handle certain input when validating email addresses. An attacker could use this to bypass email address validation. (CVE-2020-3811)
It was discovered that netqmail did not properly handle certain input when validating email addresses. An attacker could use this vulnerability to cause netqmail to disclose sensitive information. (CVE-2020-3812)
- Record
USN-4621-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
netqmailDebian:8 From an advisory covering 5 CVEs |
before 1.06-6.2~deb8u1, plus listed versions 1.06-51.06-61.06-6.1 |
1.06-6.2~deb8u1 |
netqmailDebian:9 From an advisory covering 5 CVEs |
before 1.06-6.2~deb9u1, plus listed versions 1.06-61.06-6.11.06-6.2~deb8u1 |
1.06-6.2~deb9u1 |
netqmailDebian:10 From an advisory covering 5 CVEs |
before 1.06-6.2~deb10u1, plus listed versions 1.06-61.06-6.11.06-6.2~deb8u11.06-6.2~deb9u1 |
1.06-6.2~deb10u1 |
netqmailUbuntu:Pro:14.04:LTS |
before 1.06-6.2~deb10u1build0.14.04.1+esm1, plus listed versions 1.06-5 |
1.06-6.2~deb10u1build0.14.04.1+esm1 |
netqmailUbuntu:16.04:LTS |
before 1.06-6.2~deb10u1build0.16.04.1, plus listed versions 1.06-5 |
1.06-6.2~deb10u1build0.16.04.1 |
netqmailUbuntu:18.04:LTS |
before 1.06-6.2~deb10u1build0.18.04.1, plus listed versions 1.06-6 |
1.06-6.2~deb10u1build0.18.04.1 |
netqmailUbuntu:20.04:LTS |
before 1.06-6.2~deb10u1build0.20.04.1, plus listed versions 1.06-6.1 |
1.06-6.2~deb10u1build0.20.04.1 |
netqmailUbuntu:20.04:LTS From an advisory covering 5 CVEs |
before 1.06-6.2~deb10u1build0.20.04.1, plus listed versions 1.06-6.1 |
1.06-6.2~deb10u1build0.20.04.1 |
netqmailUbuntu:16.04:LTS From an advisory covering 5 CVEs |
before 1.06-6.2~deb10u1build0.16.04.1, plus listed versions 1.06-5 |
1.06-6.2~deb10u1build0.16.04.1 |
netqmailUbuntu:18.04:LTS From an advisory covering 5 CVEs |
before 1.06-6.2~deb10u1build0.18.04.1, plus listed versions 1.06-6 |
1.06-6.2~deb10u1build0.18.04.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-3812 is a medium vulnerability (CVSS 5.5) in Debian Netqmail, published May 24, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.43%, the 36th percentile. Fixed in netqmail 1.06-6.2~deb10u1build0.14.04.1+esm1.
References
openwall.com/lists/oss-security/2020/05/19/8
bugs.debian.org/961060
debian.org/security/2020/dsa-4692
lists.debian.org/debian-lts-announce/2020/06/msg00002.html
usn.ubuntu.com/4556-1
nvd.nist.gov/vuln/detail/CVE-2020-3812
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github.com/advisories/GHSA-w98m-2722-xcvc
ubuntu.com/security/CVE-2020-3812
openwall.com/lists/oss-security/2020/05/198
ubuntu.com/security/notices/USN-4556-1
ubuntu.com/security/notices/USN-4621-1
cve.org/CVERecord?id=CVE-2020-3812
ubuntu.com/security/CVE-2005-1513
ubuntu.com/security/CVE-2005-1514
ubuntu.com/security/CVE-2005-1515
ubuntu.com/security/CVE-2020-3811