Synopsis

Moderate: qt5-qtbase and qt5-qtwebsockets security and bug fix update

Type/Severity

Security Advisory: Moderate

Topic

An update for qt5-qtbase, qt5-qttools, and qt5-qtwebsockets is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

Qt is a software toolkit for developing applications. The qt5-base packages contain base tools for string, xml, and network handling in Qt.

Security Fix(es):

• qt: XML entity expansion vulnerability (CVE-2015-9541)
• qt5-qtwebsockets: websocket implementation allows only limited size for frames and messages therefore attacker can cause DOS (CVE-2018-21035)
• qt: files placed by attacker can influence the working directory and lead to malicious code execution (CVE-2020-0569)
• qt: files placed by attacker can influence the working directory and lead to malicious code execution (CVE-2020-0570)
• qt5: incorrectly calls SSL_shutdown() in OpenSSL mid-handshake causing denial of service in TLS applications (CVE-2020-13962)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.3 Release Notes linked from the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for x86_64 8 x86_64
• Red Hat Enterprise Linux for IBM z Systems 8 s390x
• Red Hat Enterprise Linux for Power, little endian 8 ppc64le
• Red Hat Enterprise Linux for ARM 64 8 aarch64
• Red Hat CodeReady Linux Builder for x86_64 8 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian 8 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 8 aarch64
• Red Hat CodeReady Linux Builder for IBM z Systems 8 s390x

Fixes

• BZ - 1800600 - CVE-2020-0569 qt: files placed by attacker can influence the working directory and lead to malicious code execution
• BZ - 1800604 - CVE-2020-0570 qt: files placed by attacker can influence the working directory and lead to malicious code execution
• BZ - 1801369 - CVE-2015-9541 qt: XML entity expansion vulnerability
• BZ - 1810964 - CVE-2018-21035 qt5-qtwebsockets: websocket implementation allows only limited size for frames and messages therefore attacker can cause DOS
• BZ - 1832857 - Update to LLVM-10
• BZ - 1849734 - CVE-2020-13962 qt5: incorrectly calls SSL_shutdown() in OpenSSL mid-handshake causing denial of service in TLS applications

CVEs

• CVE-2015-9541
• CVE-2018-21035
• CVE-2020-0569
• CVE-2020-0570
• CVE-2020-13962

References