CairoSVG is a Python (pypi) package. CairoSVG is an SVG converter based on Cairo. In CairoSVG before version 2.5.1, there is a regular expression denial of service (REDoS) vulnerability. When processing SVG files, the python package CairoSVG uses two regular expressions which are vulnerable to Regular Expression Denial of Service (REDoS). If an attacker provides a malicious SVG, it can make cairosvg get stuck processing the file for a very long time. This is fixed in version 2.5.1. See Referenced GitHub advisory for more information.
The product does not properly control the allocation and maintenance of a limited resource.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Cairosvg | Courtbouillon | * | 2.5.1 (excluding) |
| Cairosvg | Ubuntu | bionic | * |
| Cairosvg | Ubuntu | focal | * |
| Cairosvg | Ubuntu | groovy | * |
| Cairosvg | Ubuntu | hirsute | * |
| Cairosvg | Ubuntu | impish | * |
| Cairosvg | Ubuntu | kinetic | * |
| Cairosvg | Ubuntu | lunar | * |
| Cairosvg | Ubuntu | mantic | * |
| Cairosvg | Ubuntu | oracular | * |
| Cairosvg | Ubuntu | trusty | * |
| Cairosvg | Ubuntu | xenial | * |
Mitigation of resource exhaustion attacks requires that the target system either:
The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.
The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.