VULNERABILITY INTELLIGENCE

CVE-2018-9860

CVSS score7.5 HIGH
EPSS probability1.36%
CISA KEVNot currently listed
Published2018-04-12
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Weakness classification

  • CWE-193: Off-by-one Error

Primary references