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Fix: Corrupted savegame could crash the game by providing invalid gamelog enums. #9045

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merged 1 commit into from Apr 17, 2021

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Milek7
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@Milek7 Milek7 commented Apr 16, 2021

Motivation / Problem

Corrupted savegame could crash the game by providing invalid gamelog enums. (ct is used as index to saveload description struct array, which potentially could be used to point to SaveLoad description of bigger size and subsequent heap overflow)

Description

Check if enums have valid values.

Limitations

Checklist for review

Some things are not automated, and forgotten often. This list is a reminder for the reviewers.

  • The bug fix is important enough to be backported? (label: 'backport requested')

@nielsmh nielsmh added backport requested This PR should be backport to current release (RC / stable) security This issue is possibly a security issue labels Apr 16, 2021
@LordAro LordAro merged commit da55286 into OpenTTD:master Apr 17, 2021
LordAro pushed a commit to LordAro/OpenTTD that referenced this pull request Apr 17, 2021
LordAro pushed a commit that referenced this pull request Apr 18, 2021
@LordAro LordAro added backported This PR is backported to a current release (RC / stable) and removed backport requested This PR should be backport to current release (RC / stable) labels Apr 18, 2021
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3 participants