Authentication Bypass Affecting firefox-esr package, versions <78.9.0esr-1
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Test your applications- Snyk ID SNYK-DEBIAN12-FIREFOXESR-1546259
- published 24 Mar 2021
- disclosed 31 Mar 2021
Introduced: 24 Mar 2021
CVE-2021-23984 Open this link in a new tabHow to fix?
Upgrade Debian:12
firefox-esr
to version 78.9.0esr-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream firefox-esr
package and not the firefox-esr
package as distributed by Debian
.
See How to fix?
for Debian:12
relevant fixed versions and status.
A malicious extension could have opened a popup window lacking an address bar. The title of the popup lacking an address bar should not be fully controllable, but in this situation was. This could have been used to spoof a website and attempt to trick the user into providing credentials. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.
References
- https://security-tracker.debian.org/tracker/CVE-2021-23984
- https://security.gentoo.org/glsa/202104-09
- https://security.gentoo.org/glsa/202104-10
- https://bugzilla.mozilla.org/show_bug.cgi?id=1693664
- https://www.mozilla.org/security/advisories/mfsa2021-10/
- https://www.mozilla.org/security/advisories/mfsa2021-11/
- https://www.mozilla.org/security/advisories/mfsa2021-12/