Vulnerability · Published May 6, 2021 · Assigned by mitre
CVE-2020-28013
High 7.8
In plain English
A high-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 0.4% (higher than 34% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.4%top 66.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
Exim 4 before 4.94.2 allows Heap-based Buffer Overflow because it mishandles "-F '.('" on the command line, and thus may allow privilege escalation from any user to root. This occurs because of the interpretation of negative sizes in strncpy.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | exim | 4.94.2-r0 | ALPINE-CVE-2020-28013 |
| Alpine:v3.21 | exim | 4.94.2-r0 | ALPINE-CVE-2020-28013 |
| Alpine:v3.22 | exim | 4.94.2-r0 | ALPINE-CVE-2020-28013 |
| Alpine:v3.23 | exim | 4.94.2-r0 | ALPINE-CVE-2020-28013 |
| Alpine:v3.24 | exim | 4.94.2-r0 | ALPINE-CVE-2020-28013 |
| Debian:12 | exim4 | 4.94.2-1 | DEBIAN-CVE-2020-28013 |
| Debian:13 | exim4 | 4.94.2-1 | DEBIAN-CVE-2020-28013 |
| Debian:14 | exim4 | 4.94.2-1 | DEBIAN-CVE-2020-28013 |