Vulnerability CVE-2018-9860


Published: 2018-04-12   Modified: 2018-04-15

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.

Type:

CWE-193

(Off-by-one Error)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Botan project -> Botan 

 References:
https://botan.randombit.net/security.html
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7434

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