CVE-2020-26234 Disabled Hostname Verification in OpenCast

2020-12-0822:35:13

CWE-346

GitHub_M

www.cve.org

opencast

https

hostname verification

man-in-the-middle

opencast 7.9

opencast 8.8

java key store

CVSS3

4.8

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N

AI Score

4.8

Confidence

High

EPSS

0.001

Percentile

19.4%

JSON

Opencast before versions 8.9 and 7.9 disables HTTPS hostname verification of its HTTP client used for a large portion of Opencast’s HTTP requests. Hostname verification is an important part when using HTTPS to ensure that the presented certificate is valid for the host. Disabling it can allow for man-in-the-middle attacks. This problem is fixed in Opencast 7.9 and Opencast 8.8 Please be aware that fixing the problem means that Opencast will not simply accept any self-signed certificates any longer without properly importing them. If you need those, please make sure to import them into the Java key store. Better yet, get a valid certificate.

CNA Affected

[
  {
    "product": "opencast",
    "vendor": "opencast",
    "versions": [
      {
        "status": "affected",
        "version": "< 7.9"
      },
      {
        "status": "affected",
        "version": ">= 8.0, < 8.9"
      }
    ]
  }
]