GHSA-vc2p-r46x-m3vx
Argument injection in lettre
Packages
Details
As written in the advisory (Markdown source, shown as plain text).
### Impact
Affected versions of lettre allowed argument injection to the sendmail command. It was possible, using forged to addresses, to pass arbitrary arguments to the sendmail executable.
Depending on the implementation (original sendmail, postfix, exim, etc.) it could be possible in some cases to write email data into abritrary files (using sendmail's logging features).
*NOTE*: This vulnerability only affects the sendmail transport. Others, including smtp, are not affected.
### Fix
The flaw is corrected by modifying the executed command to stop parsing arguments before passing the destination addresses.
### References
* [RUSTSEC-2020-0069](https://rustsec.org/advisories/RUSTSEC-2020-0069.html)
* [CVE-2020-28247](https://nvd.nist.gov/vuln/detail/CVE-2020-28247)
References
External links from the advisory. They lead to third-party sites.
- https://github.com/lettre/lettre/security/advisories/GHSA-vc2p-r46x-m3vx
- https://nvd.nist.gov/vuln/detail/CVE-2020-28247
- https://github.com/RustSec/advisory-db/pull/478/files
- https://github.com/lettre/lettre/pull/508/commits/bbe7cc5381c5380b54fb8bbb4f77a3725917ff0b
- https://github.com/lettre/lettre
- https://rustsec.org/advisories/RUSTSEC-2020-0069.html