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GHSA-v78m-2q7v-fjqp
No affected components available
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
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the availability of the system.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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