CVE-2018-10895 — qutebrowser before version 1

qutebrowser before version 1.4.1 is vulnerable to a cross-site request forgery flaw that allows websites to access 'qute://*' URLs. A malicious website could exploit this to load a 'qute://settings/set' URL, which then sets 'editor.command' to a bash

01What is this vulnerability?

qutebrowser before version 1.4.1 is vulnerable to a cross-site request forgery flaw that allows websites to access 'qute://*' URLs. A malicious website could exploit this to load a 'qute://settings/set' URL, which then sets 'editor.command' to a bash script, resulting in arbitrary code execution.

02Affected products

Vendor	Product	Versions
qutebrowser	cross	site request forgery flaw allows sites to access 'qute — qutebrowser 1.4.1

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2018-07-12T12:00:00.000Z
• Last modified: 2024-08-05T07:54:36.258Z

09References

• github.com — https://github.com/qutebrowser/qutebrowser/commit/43e58ac865ff862c2008c510fc5f76…
• bugzilla.redhat.com — https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10895
• www.openwall.com — http://www.openwall.com/lists/oss-security/2018/07/11/7