CVE-2020-8794
Critical
Description
OpenSMTPD before 6.6.4 allows remote code execution because of an out-of-bounds read in mta_io in mta_session.c for multi-line replies. Although this vulnerability affects the client side of OpenSMTPD, it is possible to attack a server because the server code launches the client code during bounce handling.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Opensmtpd
PublishedFeb 25, 2020
First seenFeb 25, 2020
How to fix
Update
- opensmtpd opensmtpd6.6.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| opensmtpd opensmtpd | v < 6.6.4 | 6.6.4 |
| canonical ubuntu_linux | 18.04, 19.10 | — |
| fedoraproject fedora | 31, 32 | — |
| debian debian_linux | 9.0, 10.0 | — |
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