CVE-2018-9860
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductBotan
PublishedApr 12, 2018
First seenApr 12, 2018
How to fix
Update
- botan_project botan2.6.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| botan_project botan | 1.11.32 ≤ v < 2.6.0 | 2.6.0 |
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