CVE-2023-45139

Summary

fontTools is a library for manipulating fonts, written in Python. The subsetting module has a XML External Entity Injection (XXE) vulnerability which allows an attacker to resolve arbitrary entities when a candidate font (OT-SVG fonts), which contains a SVG table, is parsed. This allows attackers to include arbitrary files from the filesystem fontTools is running on or make web requests from the host system. This vulnerability has been patched in version 4.43.0.

Affected Software

Weaknesses

• CWE-611: CWE-611: Improper Restriction of XML External Entity Reference

ADP Enrichment

CVE Program Container

Additional References

• https://github.com/fonttools/fonttools/security/advisories/GHSA-6673-4983-2vx5
• https://github.com/fonttools/fonttools/commit/9f61271dc1ca82ed91f529b130fe5dc5c9bf1f4c
• https://github.com/fonttools/fonttools/releases/tag/4.43.0
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VY63B4SGY4QOQGUXMECRGD6K3YT3GJ75/
• http://www.openwall.com/lists/oss-security/2024/03/09/1
• http://www.openwall.com/lists/oss-security/2024/03/08/2

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: yes
  • Technical Impact: partial

References

• https://github.com/fonttools/fonttools/security/advisories/GHSA-6673-4983-2vx5
• https://github.com/fonttools/fonttools/commit/9f61271dc1ca82ed91f529b130fe5dc5c9bf1f4c
• https://github.com/fonttools/fonttools/releases/tag/4.43.0
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VY63B4SGY4QOQGUXMECRGD6K3YT3GJ75/
• http://www.openwall.com/lists/oss-security/2024/03/09/1
• http://www.openwall.com/lists/oss-security/2024/03/08/2

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