CVE-2023-51766
Fixed in a distro release EPSS 1%
Exim before 4.97.1 allows SMTP smuggling in certain PIPELINING/CHUNKING configurations. Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. This occurs because Exim supports <LF>.<CR><LF> but some other popular e-mail servers do not.
Products: exim, fedoraproject extra_packages_for_enterprise_linux, fedoraproject fedora, debian_linux
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | exim | 4.97.1-r0 |
| Debian 10 | exim4 | 4.92-8+deb10u9 |
| Debian 11 | exim4 | 4.94.2-7+deb11u2 |
| Debian 12 | exim4 | 4.96-15+deb12u4 |
| Debian 13 | exim4 | 4.97-3 |
| Debian 14 | exim4 | 4.97-3 |
| SUSE Package Hub 15 SP5 | exim | 4.97.1-bp155.5.9.1 |
| Ubuntu 20.04 LTS | exim4 | 4.93-13ubuntu1.10 |
| Ubuntu 22.04 LTS | exim4 | 4.95-4ubuntu2.5 |
| Ubuntu Pro 14.04 LTS | exim4 | 4.82-3ubuntu2.4+esm9 |
| Ubuntu Pro 16.04 LTS | exim4 | 4.86.2-2ubuntu2.6+esm9 |
| Ubuntu Pro 16.04 LTS | exim4 | 4.86.2-2ubuntu2.6+esm6 |
| Ubuntu Pro 18.04 LTS | exim4 | 4.90.1-1ubuntu1.10+esm3 |
| Ubuntu Pro 18.04 LTS | exim4 | 4.90.1-1ubuntu1.10+esm6 |
| Ubuntu Pro 20.04 LTS | exim4 | 4.93-13ubuntu1.12+esm1 |
| Wolfi | exim | 4.97.1-r0 |
| openSUSE Leap 15.5 | exim | 4.97.1-bp155.5.9.1 |
| openSUSE Tumbleweed | exim | 4.97.1-1.1 |