exim4: Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters
CVE-2020-28021 is fixed in 6 products on 1 platform, first by exim4 4.90.1-1ubuntu1.8, released May 4, 2021. It is not reported as exploited. Patch Radar priority: Routine.
Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters. An authenticated remote SMTP client can insert newline characters into a spool file (which indirectly leads to remote code execution as root) via AUTH= in a MAIL FROM command.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| exim4 · Ubuntu 18.04.6 LTS (bionic) | 4.90.1-1ubuntu1.8 | exim4 4.90.1-1ubuntu1.8 | May 4, 2021 |
| exim4 · Ubuntu 20.04 LTS (focal) | 4.93-13ubuntu1.5 | exim4 4.93-13ubuntu1.5 | May 4, 2021 |
| exim4-base · Ubuntu 18.04.6 LTS (bionic) | 4.90.1-1ubuntu1.8 | exim4-base 4.90.1-1ubuntu1.8 | May 4, 2021 |
| exim4-base · Ubuntu 20.04 LTS (focal) | 4.93-13ubuntu1.5 | exim4-base 4.93-13ubuntu1.5 | May 4, 2021 |
| exim4-config · Ubuntu 18.04.6 LTS (bionic) | 4.90.1-1ubuntu1.8 | exim4-config 4.90.1-1ubuntu1.8 | May 4, 2021 |
| exim4-config · Ubuntu 20.04 LTS (focal) | 4.93-13ubuntu1.5 | exim4-config 4.93-13ubuntu1.5 | May 4, 2021 |
| exim4-daemon-heavy · Ubuntu 18.04.6 LTS (bionic) | 4.90.1-1ubuntu1.8 | exim4-daemon-heavy 4.90.1-1ubuntu1.8 | May 4, 2021 |
| exim4-daemon-heavy · Ubuntu 20.04 LTS (focal) | 4.93-13ubuntu1.5 | exim4-daemon-heavy 4.93-13ubuntu1.5 | May 4, 2021 |
| exim4-daemon-light · Ubuntu 18.04.6 LTS (bionic) | 4.90.1-1ubuntu1.8 | exim4-daemon-light 4.90.1-1ubuntu1.8 | May 4, 2021 |
| exim4-daemon-light · Ubuntu 20.04 LTS (focal) | 4.93-13ubuntu1.5 | exim4-daemon-light 4.93-13ubuntu1.5 | May 4, 2021 |
| eximon4 · Ubuntu 18.04.6 LTS (bionic) | 4.90.1-1ubuntu1.8 | eximon4 4.90.1-1ubuntu1.8 | May 4, 2021 |
| eximon4 · Ubuntu 20.04 LTS (focal) | 4.93-13ubuntu1.5 | eximon4 4.93-13ubuntu1.5 | May 4, 2021 |
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