CVE-2018-9860

HIGH

Botan 1.11.32-2.x < 2.6.0 - Denial of Service via TLS-CBC Ciphertext Processing

Title source: llm
STIX 2.1

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.

References (2)

Core 2
Core References
Vendor Advisory x_refsource_misc
https://botan.randombit.net/security.html

Scores

CVSS v3 7.5
EPSS 0.0138
EPSS Percentile 68.5%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-193
Status published
Products (1)
botan_project/botan 1.11.32 - 2.6.0
Published Apr 12, 2018
Tracked Since Feb 18, 2026