CVE-2025-32029 ts-asn1-der has Incorrect DER Encoding of Numbers Leading to Denial of Service and Incorrect Value Representation
Incorrect DER encoding of specific large integers causes an infinite loop, leading to denial of service in applications using the ts-asn1-der library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-32029?
CVE-2025-32029 is a medium-severity denial of service vulnerability in ApelegHQ ts-asn1-der, published on 7 Apr 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
ts-asn1-der is a collection of utility classes to encode ASN.1 data following DER rule. 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. The issue is patched in version 1.0.4. 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.
Which versions are affected by CVE-2025-32029?
2 open source packages ship an affected version, including @apeleghq/asn1-der.
| Package | Affected | Fixed in |
|---|---|---|
@apeleghq/asn1-der npm | All versions | 1.0.4 |
@apeleghq/asn1-der npm | All versions | 1.0.4 |
How do I fix CVE-2025-32029?
Upgrade @apeleghq/asn1-der to 1.0.4 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-32029 being exploited?
There is no known exploitation of CVE-2025-32029 in the wild and no public exploit code.
Sources
Also known as GHSA-p4qw-7j9g-5h53.