Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Botan Project | Botan | >= 1.11.32, < 2.6.0 |
Related Weaknesses (CWE)
References
- https://botan.randombit.net/security.htmlVendor Advisory
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7434Issue Tracking
- https://botan.randombit.net/security.htmlVendor Advisory
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7434Issue Tracking
FAQ
What is CVE-2018-9860?
CVE-2018-9860 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ex...
How severe is CVE-2018-9860?
CVE-2018-9860 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-9860?
Check the references section above for vendor advisories and patch information. Affected products include: Botan Project Botan.