CVE-2018-9860 Denial of service in n/a
An off-by-one error in Botan's TLS-CBC processing allows attackers to cause a denial of service by triggering an over-read that closes the connection.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-9860?
CVE-2018-9860 is a high-severity denial of service vulnerability in n/a, published on 12 Apr 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-193
Which versions are affected by CVE-2018-9860?
It affects 1 product.
Products include Botan Project Botan.
How do I fix CVE-2018-9860?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2018-9860 being exploited?
There is no known exploitation of CVE-2018-9860 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as ALPINE-CVE-2018-9860, DEBIAN-CVE-2018-9860, GHSA-3qgv-jw3w-gq48, UBUNTU-CVE-2018-9860.