Описание
Uncontrolled Recursion in rulex
Impact
When parsing untrusted rulex expressions, the stack may overflow, possibly enabling a Denial of Service attack. This happens when parsing an expression with several hundred levels of nesting, causing the process to abort immediately.
This is a security concern for you, if
- your service parses untrusted rulex expressions (expressions provided by an untrusted user), and
- your service becomes unavailable when the process running rulex aborts due to a stack overflow.
Patches
The crash is fixed in version 0.4.3. Affected users are advised to update to this version.
Workarounds
None.
For more information
If you have any questions or comments about this advisory:
- Open an issue in rulex
- Email me at ludwig.stecher@gmx.de
Credits
Credit for finding these bugs goes to
Пакеты
rulex
< 0.4.3
0.4.3
Связанные уязвимости
rulex is a new, portable, regular expression language. When parsing untrusted rulex expressions, the stack may overflow, possibly enabling a Denial of Service attack. This happens when parsing an expression with several hundred levels of nesting, causing the process to abort immediately. This is a security concern for you, if your service parses untrusted rulex expressions (expressions provided by an untrusted user), and your service becomes unavailable when the process running rulex aborts due to a stack overflow. The crash is fixed in version **0.4.3**. Affected users are advised to update to this version. There are no known workarounds for this issue.