CVE-2018-9860
7.5
HIGH
CVSS 3.1
EPSS 0.38%
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.
How to fix CVE-2018-9860
To remediate CVE-2018-9860, upgrade the affected package to a fixed version below.
- —upgrade to 2.6.0-r0 or later
- —upgrade to 2.4.0-6 or later
Is CVE-2018-9860 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 2.6.0-r0
- from 0, < 2.4.0-6
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |