Know every vulnerabilitybefore it knows you.
DevGuard continuously monitors your dependencies and alerts you when CVEs like this one affect your stack — with real-time threat intelligence built for developers.
GHSA-p4qw-7j9g-5h53
No affected components available
Impact
Incorrect number DER encoding can lead to denial on service for absolute values in the range 2**31 -- 2**32 - 1. The arithmetic in the numBitLen didn't take into account that values in this range could result in a negative result upon applying the >> operator, leading to an infinite loop.
In addition, number encoding had a few other issues that resulted it in it not encoding values correctly.
Patches
The issue is patched in version 1.0.4. Users are recommended to upgrade as soon as possible.
Workarounds
If upgrading is not an option, the issue can be mitigated by validating inputs to Asn1Integer to ensure that they are not smaller than -2**31 + 1 and no larger than 2**31 - 1. Although Asn1Integer supports bigint inputs, some additional implementation issues make using bigint as a mitigation inviable, as it will result in incorrect values.
If upgrading is not an option and range checks are impractical or undesirable, input to Asn1Integer can be provided as a buffer to be used directly. Note that this requires computing the correct DER encoding externally.
References
N/A
The vulnerability requires local access to the device to be exploited. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.
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.
Browse More
Continuously monitor your dependencies and get alerted when vulnerabilities like this one affect your stack.
Checkout DevGuard