# exim4 4.90.1-1ubuntu1.8: exim4 4.90.1-1ubuntu1.8 for Ubuntu 18.04.6 LTS (bionic)

exim4 4.90.1-1ubuntu1.8, released May 4, 2021, fixes 20 CVEs in exim4. None of them is reported as exploited. Patch Radar priority: Routine. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/linux/ubuntu-bionic-exim4-4.90.1-1ubuntu1.8
- Platform: Linux
- Released: May 4, 2021
- Priority: Routine (Closes 20 CVEs, none high severity)
- CVEs: 20, exploited: 0, on CISA KEV: 0

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [exim4](https://patchblox.com/security/data/product/linux/exim4.md) | Ubuntu 18.04.6 LTS (bionic) | 4.90.1-1ubuntu1.8 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2020-28019](https://patchblox.com/security/data/cve/CVE-2020-28019.md) | Routine | exim4: Exim 4 before 4.94.2 has Improper Initialization that can lead to recursion-based stack consumption or other conseque... | n/a | 0.6166 |  |
| [CVE-2020-28018](https://patchblox.com/security/data/cve/CVE-2020-28018.md) | Routine | exim4: Exim 4 before 4.94.2 allows Use After Free in smtp_reset in certain situations that may be common for builds with Ope... | n/a | 0.5648 |  |
| [CVE-2020-28017](https://patchblox.com/security/data/cve/CVE-2020-28017.md) | Routine | exim4: Exim 4 before 4.94.2 allows Integer Overflow to Buffer Overflow in receive_add_recipient via an e-mail message with f... | n/a | 0.3665 |  |
| [CVE-2020-28026](https://patchblox.com/security/data/cve/CVE-2020-28026.md) | Routine | exim4: Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters, relevant in non-default configurations that enab... | n/a | 0.0933 |  |
| [CVE-2020-28020](https://patchblox.com/security/data/cve/CVE-2020-28020.md) | Routine | exim4: Exim 4 before 4.92 allows Integer Overflow to Buffer Overflow, in which an unauthenticated remote attacker can execut... | n/a | 0.0794 |  |
| [CVE-2020-28024](https://patchblox.com/security/data/cve/CVE-2020-28024.md) | Routine | exim4: Exim 4 before 4.94.2 allows Buffer Underwrite that may result in unauthenticated remote attackers executing arbitrary... | n/a | 0.0415 |  |
| [CVE-2020-28021](https://patchblox.com/security/data/cve/CVE-2020-28021.md) | Routine | exim4: Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters | n/a | 0.0414 |  |
| [CVE-2020-28022](https://patchblox.com/security/data/cve/CVE-2020-28022.md) | Routine | exim4: Exim 4 before 4.94.2 has Improper Restriction of Write Operations within the Bounds of a Memory Buffer | n/a | 0.0302 |  |
| [CVE-2020-28025](https://patchblox.com/security/data/cve/CVE-2020-28025.md) | Routine | exim4: Exim 4 before 4.94.2 allows Out-of-bounds Read because pdkim_finish_bodyhash does not validate the relationship betwe... | n/a | 0.0276 |  |
| [CVE-2020-28023](https://patchblox.com/security/data/cve/CVE-2020-28023.md) | Routine | exim4: Exim 4 before 4.94.2 allows Out-of-bounds Read | n/a | 0.0261 |  |
| [CVE-2021-27216](https://patchblox.com/security/data/cve/CVE-2021-27216.md) | Routine | exim4: Exim 4 before 4.94.2 has Execution with Unnecessary Privileges | n/a | 0.0098 |  |
| [CVE-2020-28014](https://patchblox.com/security/data/cve/CVE-2020-28014.md) | Routine | exim4: Exim 4 before 4.94.2 allows Execution with Unnecessary Privileges | n/a | 0.0094 |  |
| [CVE-2020-28007](https://patchblox.com/security/data/cve/CVE-2020-28007.md) | Routine | exim4: Exim 4 before 4.94.2 allows Execution with Unnecessary Privileges | n/a | 0.0053 |  |
| [CVE-2020-28009](https://patchblox.com/security/data/cve/CVE-2020-28009.md) | Routine | exim4: Exim 4 before 4.94.2 allows Integer Overflow to Buffer Overflow because get_stdinput allows unbounded reads that are... | n/a | 0.0047 |  |
| [CVE-2020-28010](https://patchblox.com/security/data/cve/CVE-2020-28010.md) | Routine | exim4: Exim 4 before 4.94.2 allows Out-of-bounds Write because the main function, while setuid root, copies the current work... | n/a | 0.0042 |  |
| [CVE-2020-28008](https://patchblox.com/security/data/cve/CVE-2020-28008.md) | Routine | exim4-daemon-heavy: Exim 4 before 4.94.2 allows Execution with Unnecessary Privileges | n/a | 0.0041 |  |
| [CVE-2020-28012](https://patchblox.com/security/data/cve/CVE-2020-28012.md) | Routine | exim4-config: Exim 4 before 4.94.2 allows Exposure of File Descriptor to Unintended Control Sphere because rda_interpret uses a pri... | n/a | 0.0040 |  |
| [CVE-2020-28011](https://patchblox.com/security/data/cve/CVE-2020-28011.md) | Routine | exim4: Exim 4 before 4.94.2 allows Heap-based Buffer Overflow in queue_run via two sender options: -R and -S | n/a | 0.0039 |  |
| [CVE-2020-28013](https://patchblox.com/security/data/cve/CVE-2020-28013.md) | Routine | exim4: Exim 4 before 4.94.2 allows Heap-based Buffer Overflow because it mishandles "-F '.('" on the command line, and thus... | n/a | 0.0039 |  |
| [CVE-2020-28015](https://patchblox.com/security/data/cve/CVE-2020-28015.md) | Routine | exim4: Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters | n/a | 0.0038 |  |

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