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.
Find out more about CVE-2016-5420 from the MITRE CVE dictionary dictionary and NIST NVD.
| Base Score | 4.9 |
|---|---|
| Base Metrics | AV:N/AC:M/Au:S/C:P/I:P/A:N |
| Access Vector | Network |
| Access Complexity | Medium |
| Authentication | Single |
| Confidentiality Impact | Partial |
| Integrity Impact | Partial |
| Availability Impact | None |
| CVSS3 Base Score | 4.2 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N |
| Attack Vector | Network |
| Attack Complexity | High |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity Impact | Low |
| Availability Impact | None |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat JBoss Core Services 1 | RHSA-2016:2957 | 2016-12-15 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6 (httpd24-curl) | RHSA-2018:3558 | 2018-11-13 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 (httpd24-curl) | RHSA-2018:3558 | 2018-11-13 |
| Red Hat Enterprise Linux 7 (curl) | RHSA-2016:2575 | 2016-11-03 |
| Platform | Package | State |
|---|---|---|
| Red Hat JBoss Web Server 3.0 | curl | Will not fix |
| Red Hat Enterprise Linux 6 | curl | Will not fix |
| Red Hat Enterprise Linux 5 | curl | Will not fix |
| RHEV Manager 3 | mingw-virt-viewer | Will not fix |
| .NET Core 2.0 on Red Hat Enterprise Linux | rh-dotnet20-curl | Will not fix |
| .NET Core 2.0 on Red Hat Enterprise Linux | rh-dotnet21-curl | Will not fix |
| .NET Core 1.0 on Red Hat Enterprise Linux | rh-dotnetcore10-curl | Will not fix |
| .NET Core 1.0 on Red Hat Enterprise Linux | rh-dotnetcore11-curl | Will not fix |
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