Arbitrary file read via search-path and queue races
Published Feb 25, 2020 · Updated Aug 4, 2024
Arbitrary file read in OpenSMTPD before 6.6.4 allows local users to access files via crafted offline mail submissions. makemap.c resolves a helper through an untrusted search path, while smtpd.c performs race-prone checks and operations on offline queue files. Exploitation requires low-privileged local access and weak hard-link protections; the observed consequence is disclosure of the first line of arbitrary files.
Summary
What happened
Arbitrary file read in OpenSMTPD before 6.6.4 allows local users to access files via crafted offline mail submissions. makemap.c resolves a helper through an untrusted search path, while smtpd.c performs race-prone checks and operations on offline queue files. Exploitation requires low-privileged local access and weak hard-link protections; the observed consequence is disclosure of the first line of arbitrary files.
The record
- CVE
- CVE-2020-8793
- Published
- Feb 25, 2020
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-426, T1005
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 25, 2020CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- opensmptd-makemap-lpefunctional · unverified
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Technologies
Your stack
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Your stack
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