PKCS#12 MAC verification uses an attacker-controlled comparison length, weakening the integrity check on the MAC and allowing a mismatched MAC to be accepted. The PKCS#12 verify path compared the locally computed HMAC against the MAC parsed from the PKCS#12 structure using a length taken directly from the attacker-supplied input, without first verifying that it equals the length of the digest actually produced by the configured algorithm. A truncated or zero-length stored MAC could therefore be accepted, defeating the integrity protection of the MAC.
Metrics
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History
Thu, 25 Jun 2026 21:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | PKCS#12 MAC verification uses an attacker-controlled comparison length, weakening the integrity check on the MAC and allowing a mismatched MAC to be accepted. The PKCS#12 verify path compared the locally computed HMAC against the MAC parsed from the PKCS#12 structure using a length taken directly from the attacker-supplied input, without first verifying that it equals the length of the digest actually produced by the configured algorithm. A truncated or zero-length stored MAC could therefore be accepted, defeating the integrity protection of the MAC. | |
| Title | PKCS#12 MAC verification uses attacker-controlled comparison length | |
| Weaknesses | CWE-347 | |
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cvssV4_0
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MITRE
Status: PUBLISHED
Assigner: wolfSSL
Published:
Updated: 2026-06-25T21:02:45.860Z
Reserved: 2026-04-15T03:08:29.037Z
Link: CVE-2026-6329
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
Updated: 2026-06-25T22:30:15Z