CVE-2023-45139
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.24%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 1.24% probability · 67th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-611
- Affected
- fonttools/fonttools
- Source
- security-advisories@github.com
References
- http://www.openwall.com/lists/oss-security/2024/03/08/2
- http://www.openwall.com/lists/oss-security/2024/03/09/1
- https://github.com/fonttools/fonttools/commit/9f61271dc1ca82ed91f529b130fe5dc5c9bf1f4cPatch
- https://github.com/fonttools/fonttools/releases/tag/4.43.0Release Notes
- https://github.com/fonttools/fonttools/security/advisories/GHSA-6673-4983-2vx5Exploit, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VY63B4SGY4QOQGUXMECRGD6K3YT3GJ75/
- http://www.openwall.com/lists/oss-security/2024/03/08/2
- http://www.openwall.com/lists/oss-security/2024/03/09/1
- https://github.com/fonttools/fonttools/commit/9f61271dc1ca82ed91f529b130fe5dc5c9bf1f4cPatch
- https://github.com/fonttools/fonttools/releases/tag/4.43.0Release Notes
- https://github.com/fonttools/fonttools/security/advisories/GHSA-6673-4983-2vx5Exploit, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VY63B4SGY4QOQGUXMECRGD6K3YT3GJ75/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.