XXE in Fonttools
CVE-2023-45139
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.
Vulnerability class: XXE (XML External Entity)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.012 (68.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000
Affected products
- Fonttools — versions >= 4.28.2, < 4.43.0
Weakness classification (CWE)
References
- github.com/fonttools/fonttools/security/advisories/GHSA-6673-4983-2vx5 (Exploit, Vendor Advisory)
- github.com/fonttools/fonttools/commit/9f61271dc1ca82ed91f529b130fe5dc5c9bf1f4c (Patch)
- github.com/fonttools/fonttools/releases/tag/4.43.0 (Release Notes)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/…
- www.openwall.com/lists/oss-security/2024/03/09/1
- www.openwall.com/lists/oss-security/2024/03/08/2
Frequently asked questions
- What is CVE-2023-45139?
- CVE-2023-45139 is a high-severity vulnerability in Fonttools, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 7.5/10. Published 2024-01-10.
- How severe is CVE-2023-45139?
- High severity. CVSS v3 base score is 7.5 out of 10.