CVE-2016-5420
curl: Re-using connection with wrong client cert
Severity
LowRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · August 3, 2016
Updated · September 21, 2026
Description
It was found that the libcurl library did not check the client certificate when choosing the TLS connection to reuse. An attacker could potentially use this flaw to hijack the authentication of the connection by leveraging a previously created connection with a different client certificate.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.0 · 4.2CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS 2.0 · 4.9AV:N/AC:M/Au:S/C:P/I:P/A:N
CWE-295 · Improper Certificate Validation