A vulnerability classified as problematic has been found in lettersanitizer up to 1.0.1. Affected is an unknown code of the component CSS Rule Handler. The manipulation of the argument @keyframes with an unknown input leads to a unusual condition vulnerability. CWE is classifying the issue as CWE-754. The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product. This is going to have an impact on availability. CVE summarizes:

lettersanitizer is a DOM-based HTML email sanitizer for in-browser email rendering. All versions of lettersanitizer below 1.0.2 are affected by a denial of service issue when processing a CSS at-rule `@keyframes`. This package is depended on by [react-letter](https://github.com/mat-sz/react-letter), therefore everyone using react-letter is also at risk. The problem has been patched in version 1.0.2.

The weakness was presented 06/28/2022 as GHSA-7r3r-gq8p-v9jj. The advisory is available at github.com. This vulnerability is traded as CVE-2022-31103 since 05/18/2022. Technical details are known, but there is no available exploit.

Upgrading to version 1.0.2 eliminates this vulnerability. Applying the patch 96d3dfe2ef0465d47324ed4d13e91ba0816a173f is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Productinfo

Name

• lettersanitizer

Version

• 1.0.0
• 1.0.1

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Discussion