CVE-2016-8616 Auth bypass in curl
Attackers can bypass authentication by exploiting case-insensitive credential checks to reuse existing connections with valid credentials.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-8616?
CVE-2016-8616 is a low-severity authentication bypass vulnerability in Haxx Curl, published on 1 Aug 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw was found in curl before version 7.51.0 When re-using a connection, curl was doing case insensitive comparisons of user name and password with the existing connections. This means that if an unused connection with proper credentials exists for a protocol that has connection-scoped credentials, an attacker can cause that connection to be reused if s/he knows the case-insensitive version of the correct password.
Which versions are affected by CVE-2016-8616?
It affects 1 product.
Products include Haxx Curl.
How do I fix CVE-2016-8616?
Upgrade to a fixed version.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2016-8616 being exploited?
There is no known exploitation of CVE-2016-8616 in the wild and no public exploit code.
Other vulnerabilities in Haxx Curl
Sources
Also known as ALPINE-CVE-2016-8616, CLEANSTART-2026-KR73737, CURL-CVE-2016-8616, DEBIAN-CVE-2016-8616, GHSA-22qv-x7vv-h86h, UBUNTU-CVE-2016-8616.