CVE-2021-34555: Fix multi-value From rejection logic #178
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
This change fixes the broken reject logic when a multi-value
Fromheader field is detected. It also adds a guard against deref of NULL domains (CVE-2021-34555, see #179).It includes an unrelated addition, namely the missing if-guard before the syslog call, as is done elsewhere in this function.
This fixes #175.
This fixes #179.