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CVE-2021-22890

Status Candidate

Overview

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.

Related Files

Red Hat Security Advisory 2021-2472-01
Posted Jun 17, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2472-01 - This release adds the new Apache HTTP Server 2.4.37 Service Pack 8 packages that are part of the JBoss Core Services offering. This release serves as a replacement for Red Hat JBoss Core Services Pack Apache Server 2.4.37 Service Pack 7 and includes bug fixes and enhancements. Issues addressed include null pointer and use-after-free vulnerabilities.

tags | advisory, web, vulnerability
systems | linux, redhat
advisories | CVE-2020-8169, CVE-2020-8284, CVE-2020-8285, CVE-2020-8286, CVE-2021-22876, CVE-2021-22890, CVE-2021-22901, CVE-2021-31618
MD5 | c308d1b35aaee932e278bfd46fa969df
Red Hat Security Advisory 2021-2471-01
Posted Jun 17, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2471-01 - Red Hat JBoss Core Services is a set of supplementary software for Red Hat JBoss middleware products. This software, such as Apache HTTP Server, is common to multiple JBoss middleware products, and is packaged under Red Hat JBoss Core Services to allow for faster distribution of updates, and for a more consistent update experience. This release adds the new Apache HTTP Server 2.4.37 Service Pack 8 packages that are part of the JBoss Core Services offering. This release serves as a replacement for Red Hat JBoss Core Services Pack Apache Server 2.4.37 Service Pack 7 and includes bug fixes and enhancements. Issues addressed include null pointer and use-after-free vulnerabilities.

tags | advisory, web, vulnerability
systems | linux, redhat
advisories | CVE-2020-8169, CVE-2020-8284, CVE-2020-8285, CVE-2020-8286, CVE-2021-22876, CVE-2021-22890, CVE-2021-22901, CVE-2021-31618
MD5 | 99808e8e4b3b8e79dea816b2780f6fd5
Gentoo Linux Security Advisory 202105-36
Posted May 26, 2021
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202105-36 - Multiple vulnerabilities have been found in cURL, the worst of which could result in the arbitrary execution of code. Versions less than 7.77.0 are affected.

tags | advisory, arbitrary, vulnerability
systems | linux, gentoo
advisories | CVE-2021-22876, CVE-2021-22890, CVE-2021-22898, CVE-2021-22901
MD5 | 94180abd6fb5ce62d4b9cd723e72a93d
Ubuntu Security Notice USN-4898-1
Posted Mar 31, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4898-1 - Viktor Szakats discovered that curl did not strip off user credentials from referrer header fields. A remote attacker could possibly use this issue to obtain sensitive information. Mingtao Yang discovered that curl incorrectly handled session tickets when using an HTTPS proxy. A remote attacker in control of an HTTPS proxy could use this issue to bypass certificate checks and intercept communications. This issue only affected Ubuntu 20.04 LTS and Ubuntu 20.10. Various other issues were also addressed.

tags | advisory, remote, web
systems | linux, ubuntu
advisories | CVE-2021-22876, CVE-2021-22890
MD5 | 231654afdd07d6769fa7452e76aff9ab
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