UBUNTU-CVE-2021-22890

See a problem?

Source

https://ubuntu.com/security/notices/UBUNTU-CVE-2021-22890

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-22890.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-22890

Related

Published

2021-03-31T06:00:00Z

Modified

2021-03-31T06:00:00Z

Severity

3.7 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator

Summary

[none]

Details

curl 7.63.0 to and including 7.75.0 includes vulnerability that allows a malicious HTTPS proxy to MITM a connection due to bad handling of TLS 1.3 session tickets. When using a HTTPS proxy and TLS 1.3, libcurl can confuse session tickets arriving from the HTTPS proxy but work as if they arrived from the remote server and then wrongly "short-cut" the host handshake. When confusing the tickets, a HTTPS proxy can trick libcurl to use the wrong session ticket resume for the host and thereby circumvent the server TLS certificate check and make a MITM attack to be possible to perform unnoticed. Note that such a malicious HTTPS proxy needs to provide a certificate that curl will accept for the MITMed server for an attack to work - unless curl has been told to ignore the server certificate check.

References

Affected packages

Ubuntu:20.04:LTS / curl

Package

Name: curl
Purl: pkg:deb/ubuntu/curl@7.68.0-1ubuntu2.5?arch=src?distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

7.68.0-1ubuntu2.5

Affected versions

7.*

7.65.3-1ubuntu3

7.65.3-1ubuntu4

7.66.0-1ubuntu1

7.67.0-2ubuntu1

7.68.0-1ubuntu1

7.68.0-1ubuntu2

7.68.0-1ubuntu2.1

7.68.0-1ubuntu2.2

7.68.0-1ubuntu2.4

Ecosystem specific

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "curl-dbgsym": "7.68.0-1ubuntu2.5",
            "curl": "7.68.0-1ubuntu2.5",
            "libcurl4": "7.68.0-1ubuntu2.5",
            "libcurl4-gnutls-dev": "7.68.0-1ubuntu2.5",
            "libcurl4-dbgsym": "7.68.0-1ubuntu2.5",
            "libcurl3-nss": "7.68.0-1ubuntu2.5",
            "libcurl4-doc": "7.68.0-1ubuntu2.5",
            "libcurl3-nss-dbgsym": "7.68.0-1ubuntu2.5",
            "libcurl3-gnutls": "7.68.0-1ubuntu2.5",
            "libcurl3-gnutls-dbgsym": "7.68.0-1ubuntu2.5",
            "libcurl4-openssl-dev": "7.68.0-1ubuntu2.5",
            "libcurl4-nss-dev": "7.68.0-1ubuntu2.5"
        }
    ]
}