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CVE-2020-8793

Publication date 25 February 2020

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

4.7 · Medium

Score breakdown

OpenSMTPD before 6.6.4 allows local users to read arbitrary files (e.g., on some Linux distributions) because of a combination of an untrusted search path in makemap.c and race conditions in the offline functionality in smtpd.c.

Mitigation

Ubuntu ships with /proc/sys/fs/protected_hardlinks enabled by default, making this vulnerability not exploitable.

Status

Package Ubuntu Release Status
opensmtpd 24.04 LTS noble
Fixed 6.6.4p1-1
23.10 mantic
Fixed 6.6.4p1-1
23.04 lunar
Fixed 6.6.4p1-1
22.10 kinetic
Fixed 6.6.4p1-1
22.04 LTS jammy
Fixed 6.6.4p1-1
21.10 impish
Fixed 6.6.4p1-1
21.04 hirsute
Fixed 6.6.4p1-1
20.10 groovy
Fixed 6.6.4p1-1
20.04 LTS focal
Fixed 6.6.4p1-1
19.10 eoan
Fixed 6.0.3p1-6ubuntu0.2
18.04 LTS bionic
Fixed 6.0.3p1-1ubuntu0.2
16.04 LTS xenial
14.04 LTS trusty
Vulnerable

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Severity score breakdown

Parameter Value
Base score 4.7 · Medium
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

    • USN-4294-1
    • OpenSMTPD vulnerabilities
    • 2 March 2020
    • USN-4875-1
    • OpenSMTPD vulnerabilities
    • 15 March 2021

Other references