Description (CNA)
pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.4, the BER decoder shared by the CER and DER codecs parses long-form tags by accumulating continuation octets without an upper bound on the tag ID size, allowing a crafted input to force construction of an arbitrarily large integer with CPU cost growing quadratically and to trigger unhandled ValueError exceptions in Python 3.11+ error formatting paths. Any application decoding untrusted BER, CER, or DER input is affected. This issue is fixed in version 0.6.4.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| pyasn1 / pyasn1 | affected < 0.6.4 |
CWE
CWE-400
References
- https://github.com/pyasn1/pyasn1/security/advisories/GHSA-m4p7-r5rc-7g4j
- https://github.com/pyasn1/pyasn1/commit/628e36ecbb5277a3f01572ce418ef54271b165a5
- https://github.com/pyasn1/pyasn1/releases/tag/v0.6.4
ADP enrichment
No English description supplied.
No references supplied.