fonttools XML External Entity Injection (XXE) Vulnerability
CVE-2023-45139

7.5HIGH

Key Information:

Vendor

Fonttools

Status
Fonttools
Vendor
CVE Published:
10 January 2024

What is CVE-2023-45139?

The fontTools library, a popular Python toolkit for manipulating fonts, has a security vulnerability within its subsetting module. This vulnerability arises from an XML External Entity Injection (XXE) flaw, which could enable attackers to resolve arbitrary entities during the parsing of OT-SVG fonts containing an SVG table. Exploiting this flaw allows unauthorized access to the host filesystem, leading to inclusion of arbitrary files or making external web requests. This security issue has been addressed and patched in fontTools version 4.43.0, making it critical for users to upgrade to this version to mitigate risks associated with this vulnerability.

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Affected Version(s)

fonttools >= 4.28.2, < 4.43.0

References

https://github.com/fonttools/fonttools/security/advisorie...
x_refsource_CONFIRM
https://github.com/fonttools/fonttools/commit/9f61271dc1c...
x_refsource_MISC
https://github.com/fonttools/fonttools/releases/tag/4.43.0
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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