CVE-2020-13962

HIGH EPSS 85.7%
Published Jun 9, 20206y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Jun 9, 2020 6y ago
Last Modified Jun 17, 2026 2w ago

Description

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.)

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
85.7% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Affected Products 8

VendorProductVersionRange
mumblemumble1.3.0any
qtqt*≥5.12.2  –  <5.12.9
qtqt*≥5.13.0  –  ≤5.13.2
qtqt*≥5.14.0  –  ≤5.14.2
fedoraprojectfedora31any
fedoraprojectfedora32any
fedoraprojectfedora33any
opensuseleap15.2any

References 8

  • lists.opensuse.org http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00004.html
    Mailing ListThird Party Advisory
  • bugreports.qt.io https://bugreports.qt.io/browse/QTBUG-83450
    Issue TrackingVendor Advisory
  • github.com https://github.com/mumble-voip/mumble/issues/3679
    ExploitIssue TrackingPatchThird Party Advisory
  • github.com https://github.com/mumble-voip/mumble/pull/4032
    PatchThird Party Advisory
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4X6EDPIIAQPVP2CHL2CHDHJ25EECA7UE/
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQJDBZUYMMF4R5QQKD2HTIKQU2NSKO63/
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V3IZY7LKJ6NAXQDFYFR4S7L5BBHYK53K/
  • security.gentoo.org https://security.gentoo.org/glsa/202007-18
    Third Party Advisory

Remediation

  • github.com https://github.com/mumble-voip/mumble/issues/3679
    ExploitIssue TrackingPatchThird Party Advisory
  • github.com https://github.com/mumble-voip/mumble/pull/4032
    PatchThird Party Advisory