Vulnerability · Published May 6, 2021 · Assigned by mitre
CVE-2020-28009
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 0.5% (higher than 41% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.5%top 59.3% 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 Integer Overflow to Buffer Overflow because get_stdinput allows unbounded reads that are accompanied by unbounded increases in a certain size variable. NOTE: exploitation may be impractical because of the execution time needed to overflow (multiple days).
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | exim | 4.94.2-r0 | ALPINE-CVE-2020-28009 |
| Alpine:v3.21 | exim | 4.94.2-r0 | ALPINE-CVE-2020-28009 |
| Alpine:v3.22 | exim | 4.94.2-r0 | ALPINE-CVE-2020-28009 |
| Alpine:v3.23 | exim | 4.94.2-r0 | ALPINE-CVE-2020-28009 |
| Alpine:v3.24 | exim | 4.94.2-r0 | ALPINE-CVE-2020-28009 |
| Debian:12 | exim4 | 4.94.2-1 | DEBIAN-CVE-2020-28009 |
| Debian:13 | exim4 | 4.94.2-1 | DEBIAN-CVE-2020-28009 |
| Debian:14 | exim4 | 4.94.2-1 | DEBIAN-CVE-2020-28009 |