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Vulnerability · Published May 6, 2021 · Assigned by mitre

CVE-2020-28018

Critical 9.8

In plain English

A critical-severity security flaw in the exim package (Alpine). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 56.5% (higher than 99.1% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)9.8Critical
Exploit odds (30 days)56.5%top 0.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack tooling1Public PoC

Official description

Exim 4 before 4.94.2 allows Use After Free in smtp_reset in certain situations that may be common for builds with OpenSSL.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20exim4.94.2-r0ALPINE-CVE-2020-28018
Alpine:v3.21exim4.94.2-r0ALPINE-CVE-2020-28018
Alpine:v3.22exim4.94.2-r0ALPINE-CVE-2020-28018
Alpine:v3.23exim4.94.2-r0ALPINE-CVE-2020-28018
Alpine:v3.24exim4.94.2-r0ALPINE-CVE-2020-28018
Debian:12exim44.94.2-1DEBIAN-CVE-2020-28018
Debian:13exim44.94.2-1DEBIAN-CVE-2020-28018
Debian:14exim44.94.2-1DEBIAN-CVE-2020-28018

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References