CVE-2018-9860

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

An issue was discovered in Botan 1.11.32 through 2.x before 2.6.0. An off-by-one error when processing malformed TLS-CBC ciphertext could cause the receiving side to include in the HMAC computation exactly 64K bytes of data following the record buffer, aka an over-read. The MAC comparison will subsequently fail and the connection will be closed. This could be used for denial of service. No information leak occurs.

Metrics

CVSS 3.0 7.5/10CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-193

Affected software

No affected versions have been published.

Timeline

Published: Apr 12, 2018
Last modified: Jun 17, 2026
NVD status: Modified

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