Home/CVE/OpenSMTPD before 6.6.4 allows local users to read arbitrary files (e.g., on some Linux distributions) because of a combi
CVE

CVE-2020-8793

OpenSMTPD before 6.6.4 allows local users to read arbitrary files (e.g., on some Linux distributions) because of a combi

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.

MEDIUM · CVSS 4.7 EPSS 0.00786
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
CWE-426Untrusted Search Path
▤

Affected Products & Versions

3
opensmtpd< 6.6.4
fedoraproject fedoraall versions
canonical ubuntu linuxall versions
⚠

Public Exploits & PoCs

1
remoteOpenSMTPD 6.6.3 - Arbitrary File Read2020-02-26
▣

Scoring & Timeline

4.7
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD25 Feb 2020 · 05:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
⚑

Vendor Advisories

2
usnUSN-4875-1
usnUSN-4294-1
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://seclists.org/fulldisclosure/2020/Feb/28Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2020/02/24/4ExploitMailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/
https://usn.ubuntu.com/4294-1/Third Party Advisory
https://www.openbsd.org/security.htmlThird Party Advisory
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