Vulnerability · Published May 6, 2021 · Assigned by mitre
CVE-2020-28007
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 45% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.5%top 55.0% 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 Execution with Unnecessary Privileges. Because Exim operates as root in the log directory (owned by a non-root user), a symlink or hard link attack allows overwriting critical root-owned files anywhere on the filesystem.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | exim | 4.94.2-r0 | ALPINE-CVE-2020-28007 |
| Alpine:v3.21 | exim | 4.94.2-r0 | ALPINE-CVE-2020-28007 |
| Alpine:v3.22 | exim | 4.94.2-r0 | ALPINE-CVE-2020-28007 |
| Alpine:v3.23 | exim | 4.94.2-r0 | ALPINE-CVE-2020-28007 |
| Alpine:v3.24 | exim | 4.94.2-r0 | ALPINE-CVE-2020-28007 |
| Debian:12 | exim4 | 4.94.2-1 | DEBIAN-CVE-2020-28007 |
| Debian:13 | exim4 | 4.94.2-1 | DEBIAN-CVE-2020-28007 |
| Debian:14 | exim4 | 4.94.2-1 | DEBIAN-CVE-2020-28007 |