CVE-2020-13962
published 2020-06-09CVE-2020-13962: Qt 5.12.2 through 5.14.2, as used in unofficial builds of Mumble 1.3.0 and other products, mishandles OpenSSL's error queue, which can cause a denial of…
PriorityP336high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
3.01%
85.7th percentile
Qt 5.12.2 through 5.14.2, as used in unofficial builds of Mumble 1.3.0 and other products, mishandles OpenSSL's error queue, which can cause a denial of service to QSslSocket users. Because errors leak in unrelated TLS sessions, an unrelated session may be disconnected when any handshake fails. (Mumble 1.3.1 is not affected, regardless of the Qt version.)
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | qtbase-opensource-src | < qtbase-opensource-src 5.14.2+dfsg-6 (bookworm) | qtbase-opensource-src 5.14.2+dfsg-6 (bookworm) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| msrc | cbl2_qt5-qtsvg_5.12.11-3_on_cbl_mariner_2.0 | — | — |
| msrc | cbl_mariner_2.0_arm | — | — |
| msrc | cbl_mariner_2.0_x64 | — | — |
| mumble | mumble | — | — |
| opensuse | leap | — | — |
| qt | qt | >= 5.12.2 < 5.12.9 | 5.12.9 |
| qt | qt | 5.13.0 – 5.13.2 | — |
| qt | qt | 5.14.0 – 5.14.2 | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
osv7.5HIGH
vendor_debian7.5HIGH
vendor_msrc7.5HIGH
vendor_redhat7.5HIGH
vendor_ubuntu7.5HIGH
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Ubuntu
Qt vulnerabilities
vendor_ubuntu·2026-03-05·CVSS 7.5
CVE-2020-13962 [HIGH] Qt vulnerabilities
Title: Qt vulnerabilities
Summary: Several security issues were fixed in Qt.
It was discovered that Qt did not correctly handle OpenSSL's error queue.
An attacker could possibly use this issue to cause a denial of service.
This issue was only addressed in Ubuntu 20.04 LTS. (CVE-2020-13962)
It was discovered that Qt incorrectly handled certain XBM image files. If a
user or automated system were tricked into opening a specially crafted PPM
file, a remote attacker could cause Qt to crash, resulting in a denial of
service. This issue was only addressed in Ubuntu 16.04 LTS and
Ubuntu 20.04 LTS. (CVE-2020-17507)
It was discovered that Qt did not correctly handle executing specific
binaries. If a user or automated system were tricked into executing a
binary at a specific file path, an attacke
Red Hat
qt5: incorrectly calls SSL_shutdown() in OpenSSL mid-handshake causing denial of service in TLS applications
vendor_redhat·2020-06-09·CVSS 7.5
CVE-2020-13962 [HIGH] CWE-391 qt5: incorrectly calls SSL_shutdown() in OpenSSL mid-handshake causing denial of service in TLS applications
qt5: incorrectly calls SSL_shutdown() in OpenSSL mid-handshake causing denial of service in TLS applications
Qt 5.12.2 through 5.14.2, as used in unofficial builds of Mumble 1.3.0 and other products, mishandles OpenSSL's error queue, which can cause a denial of service to QSslSocket users. Because errors leak in unrelated TLS sessions, an unrelated session may be disconnected when any handshake fails. (Mumble 1.3.1 is not affected, regardless of the Qt version.)
Mitigation: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Microsoft
Qt 5.12.2 through 5.14.2 as used in unofficial builds of Mumble 1.3.0 and other products mishandles OpenSSL's error queue which can cause a denial of service to QSslSocket users. Because errors leak i
vendor_msrc·2020-06-09·CVSS 7.5
CVE-2020-13962 [HIGH] Qt 5.12.2 through 5.14.2 as used in unofficial builds of Mumble 1.3.0 and other products mishandles OpenSSL's error queue which can cause a denial of service to QSslSocket users. Because errors leak i
Qt 5.12.2 through 5.14.2 as used in unofficial builds of Mumble 1.3.0 and other products mishandles OpenSSL's error queue which can cause a denial of service to QSslSocket users. Because errors leak in unrelated TLS sessions an unrelated session may be disconnected when any handshake fails. (Mumble 1.3.1 is not affected regardless of the Qt version.)
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why w
Debian
CVE-2020-13962: qtbase-opensource-src - Qt 5.12.2 through 5.14.2, as used in unofficial builds of Mumble 1.3.0 and other...
vendor_debian·2020·CVSS 7.5
CVE-2020-13962 [HIGH] CVE-2020-13962: qtbase-opensource-src - Qt 5.12.2 through 5.14.2, as used in unofficial builds of Mumble 1.3.0 and other...
Qt 5.12.2 through 5.14.2, as used in unofficial builds of Mumble 1.3.0 and other products, mishandles OpenSSL's error queue, which can cause a denial of service to QSslSocket users. Because errors leak in unrelated TLS sessions, an unrelated session may be disconnected when any handshake fails. (Mumble 1.3.1 is not affected, regardless of the Qt version.)
Scope: local
bookworm: resolved (fixed in 5.14.2+dfsg-6)
bullseye: resolved (fixed in 5.14.2+dfsg-6)
forky: resolved (fixed in 5.14.2+dfsg-6)
sid: resolved (fixed in 5.14.2+dfsg-6)
trixie: resolved (fixed in 5.14.2+dfsg-6)
OSV
qtbase-opensource-src vulnerabilities
osv·2026-03-05·CVSS 7.5
CVE-2020-13962 [HIGH] qtbase-opensource-src vulnerabilities
qtbase-opensource-src vulnerabilities
It was discovered that Qt did not correctly handle OpenSSL's error queue.
An attacker could possibly use this issue to cause a denial of service.
This issue was only addressed in Ubuntu 20.04 LTS. (CVE-2020-13962)
It was discovered that Qt incorrectly handled certain XBM image files. If a
user or automated system were tricked into opening a specially crafted PPM
file, a remote attacker could cause Qt to crash, resulting in a denial of
service. This issue was only addressed in Ubuntu 16.04 LTS and
Ubuntu 20.04 LTS. (CVE-2020-17507)
It was discovered that Qt did not correctly handle executing specific
binaries. If a user or automated system were tricked into executing a
binary at a specific file path, an attacker could cause a denial of
service or exe
GHSA
GHSA-c4xh-w73g-qgf6: Qt 5
ghsa_unreviewed·2022-05-24
CVE-2020-13962 [MEDIUM] GHSA-c4xh-w73g-qgf6: Qt 5
Qt 5.12.2 through 5.14.2, as used in unofficial builds of Mumble 1.3.0 and other products, mishandles OpenSSL's error queue, which can cause a denial of service to QSslSocket users. Because errors leak in unrelated TLS sessions, an unrelated session may be disconnected when any handshake fails. (Mumble 1.3.1 is not affected, regardless of the Qt version.)
OSV
CVE-2020-13962: Qt 5
osv·2020-06-09·CVSS 7.5
CVE-2020-13962 [HIGH] CVE-2020-13962: Qt 5
Qt 5.12.2 through 5.14.2, as used in unofficial builds of Mumble 1.3.0 and other products, mishandles OpenSSL's error queue, which can cause a denial of service to QSslSocket users. Because errors leak in unrelated TLS sessions, an unrelated session may be disconnected when any handshake fails. (Mumble 1.3.1 is not affected, regardless of the Qt version.)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2020-13962 mumble: qt5: incorrectly calls SSL_shutdown() in OpenSSL mid-handshake causing denial of service in TLS applications [fedora-all]
bugzilla·2020-06-22·CVSS 7.5
CVE-2020-13962 [HIGH] CVE-2020-13962 mumble: qt5: incorrectly calls SSL_shutdown() in OpenSSL mid-handshake causing denial of service in TLS applications [fedora-all]
CVE-2020-13962 mumble: qt5: incorrectly calls SSL_shutdown() in OpenSSL mid-handshake causing denial of service in TLS applications [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg co
Bugzilla
CVE-2020-13962 qt5: incorrectly calls SSL_shutdown() in OpenSSL mid-handshake causing denial of service in TLS applications
bugzilla·2020-06-22·CVSS 7.5
CVE-2020-13962 [HIGH] CVE-2020-13962 qt5: incorrectly calls SSL_shutdown() in OpenSSL mid-handshake causing denial of service in TLS applications
CVE-2020-13962 qt5: incorrectly calls SSL_shutdown() in OpenSSL mid-handshake causing denial of service in TLS applications
Qt 5.12.2 through 5.14.2, as used in unofficial builds of Mumble 1.3.0 and other products, mishandles OpenSSL's error queue, which can cause a denial of service to QSslSocket users. Because errors leak in unrelated TLS sessions, an unrelated session may be disconnected when any handshake fails. (Mumble 1.3.1 is not affected, regardless of the Qt version.)
Upstream Bug:
https://bugreports.qt.io/browse/QTBUG-83450
References:
https://github.com/mumble-voip/mumble/issues/3679
https://github.com/mumble-voip/mumble/pull/4032
Discussion:
Created mumble tracking bugs for this issue:
Affects: fedora-all [bug 1849735]
---
Created qt5 tracking bugs for this issue:
A
Bugzilla
CVE-2020-13962 qt5: incorrectly calls SSL_shutdown() in OpenSSL mid-handshake causing denial of service in TLS applications [fedora-all]
bugzilla·2020-06-22·CVSS 7.5
CVE-2020-13962 [HIGH] CVE-2020-13962 qt5: incorrectly calls SSL_shutdown() in OpenSSL mid-handshake causing denial of service in TLS applications [fedora-all]
CVE-2020-13962 qt5: incorrectly calls SSL_shutdown() in OpenSSL mid-handshake causing denial of service in TLS applications [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit mes
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00004.htmlhttps://bugreports.qt.io/browse/QTBUG-83450https://github.com/mumble-voip/mumble/issues/3679https://github.com/mumble-voip/mumble/pull/4032https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4X6EDPIIAQPVP2CHL2CHDHJ25EECA7UE/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQJDBZUYMMF4R5QQKD2HTIKQU2NSKO63/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V3IZY7LKJ6NAXQDFYFR4S7L5BBHYK53K/https://security.gentoo.org/glsa/202007-18http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00004.htmlhttps://bugreports.qt.io/browse/QTBUG-83450https://github.com/mumble-voip/mumble/issues/3679https://github.com/mumble-voip/mumble/pull/4032https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4X6EDPIIAQPVP2CHL2CHDHJ25EECA7UE/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQJDBZUYMMF4R5QQKD2HTIKQU2NSKO63/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V3IZY7LKJ6NAXQDFYFR4S7L5BBHYK53K/https://security.gentoo.org/glsa/202007-18
2020-06-09
Published