CVE-2018-9860

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.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.50%
Vendor Advisory randombit.net
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7434 issue tracking
https://botan.randombit.net/security.html vendor advisory

Frequently Asked Questions

What is the severity of CVE-2018-9860?
CVE-2018-9860 has been scored as a high severity vulnerability.
How to fix CVE-2018-9860?
To fix CVE-2018-9860, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-9860 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2018-9860 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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