Описание
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.
A flaw was found in the subsetting module of FontTools, which contains an XML External Entity Injection (XXE) vulnerability. This flaw allows malicious actors to exploit the parsing of candidate fonts, particularly those with an OT-SVG format that includes an SVG table. Through this vulnerability, attackers can manipulate the system to resolve arbitrary entities, potentially allowing them to include files from the filesystem where FontTools is operating or even initiate web requests from the host system.
Отчет
Note that the impact is dependent on the environment fontTools is running in. The vulnerability has the most impact on consumers of fontTools who leverage the subsetting utility to subset untrusted OT-SVG fonts where the vulnerability may be exploited to read arbitrary files from the filesystem of the host fonttools is running on.
Меры по смягчению последствий
There may be other ways to mitigate the issue. Here are some suggestions:
Set the resolve_entities=False flag on parsing methods.
Consider further methods of disallowing doctype declarations.
Consider recursive regex matching.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 7 | fonttools | Not affected | ||
| Red Hat Enterprise Linux 8 | google-noto-emoji-fonts | Not affected | ||
| Red Hat Enterprise Linux 9 | google-noto-emoji-fonts | Not affected |
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Дополнительная информация
Статус:
EPSS
7.5 High
CVSS3
Связанные уязвимости
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.
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.
fontTools is a library for manipulating fonts, written in Python. The ...
fonttools XML External Entity Injection (XXE) Vulnerability
EPSS
7.5 High
CVSS3