Is CVE-2020-8793 in the CISA KEV catalog?

No. CVE-2020-8793 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-8793?

CVE-2020-8793 has a CVSS v3 base score of 4.7 (MEDIUM).

What is the EPSS score for CVE-2020-8793?

CVE-2020-8793 has an EPSS score of 0.90% (55th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-8793?

Upgrade opensmtpd on debian 11 to 6.6.4p1-1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2020-8793

MEDIUM

4.7

CVSS v3

NVD

Description

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.

CWE-367TOCTOU Race Condition CWE-426

How to fix

Remediation Available

opensmtpdDebian

Fixed in:6.6.4p1-1CVE-2020-8793

opensmtpdUbuntu

Fixed in:5.4.1p1-1ubuntu0.1~esm1USN-4875-1

Fixed in:5.7.3p2-1ubuntu0.1~esm2USN-4875-1

Fixed in:6.0.3p1-1ubuntu0.2USN-4294-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

0.90%probability of exploitation in 30 days

55thpercentile

Moderate risk: more likely to be exploited than 55% of all known CVEs.

References

Exploit1

openwall.com

Third-Party Advisory3

Other references1

lists.fedoraproject.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.