Incorrect Provision of Specified Functionality in qutebrowser

2020-05-0819:05:05

Google

osv.dev

3.5 Low

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:N/A:N

0.001 Low

EPSS

Percentile

36.6%

JSON

Description

After a certificate error was overridden by the user, qutebrowser displays the URL as yellow (colors.statusbar.url.warn.fg). However, when the affected website was subsequently loaded again, the URL was mistakenly displayed as green (colors.statusbar.url.success_https). While the user already has seen a certificate error prompt at this point (or set content.ssl_strict to false which is not recommended), this could still provide a false sense of security.

Affected versions and patches

All versions of qutebrowser are believed to be affected, though versions before v0.11.x couldn’t be tested.

The issue is fixed in qutebrowser v1.11.1 (pending release) and v1.12.0 (unreleased). Backported patches for older versions are available, but no further releases are planned.

Mitigation

If you are unable to upgrade:

Treat any host with a certificate exception as insecure, ignoring the URL color
Or set content.ssl_strict to True (instead of 'ask'), preventing certificate exceptions

References

qutebrowser issue: https://github.com/qutebrowser/qutebrowser/issues/5403
Fix (master branch): https://github.com/qutebrowser/qutebrowser/commit/021ab572a319ca3db5907a33a59774f502b3b975
Related issue for KDE Falkon: https://bugs.kde.org/show_bug.cgi?id=420902
Related issue for eric6 Web Browser: https://tracker.die-offenbachs.homelinux.org/eric/issue328 (fixed in eric6 20.6)

CPENameOperatorVersion
qutebrowsereq1.10.0
qutebrowsereq1.10.1
qutebrowsereq1.3.0
qutebrowsereq0.0.0
qutebrowsereq0.8.0
qutebrowsereq0.9.0
qutebrowsereq0.5.0
qutebrowsereq0.8.2
qutebrowsereq0.10.0
qutebrowsereq0.2.0

Name	Operator	Version
qutebrowser	eq	1.10.0
qutebrowser	eq	1.10.1
qutebrowser	eq	1.3.0
qutebrowser	eq	0.0.0
qutebrowser	eq	0.8.0
qutebrowser	eq	0.9.0
qutebrowser	eq	0.5.0
qutebrowser	eq	0.8.2
qutebrowser	eq	0.10.0
qutebrowser	eq	0.2.0