CVE-2021-38492

Summary

When delegating navigations to the operating system, Firefox would accept the mk scheme which might allow attackers to launch pages and execute scripts in Internet Explorer in unprivileged mode. This bug only affects Firefox for Windows. Other operating systems are unaffected.. This vulnerability affects Firefox < 92, Thunderbird < 91.1, Thunderbird < 78.14, Firefox ESR < 78.14, and Firefox ESR < 91.1.

Affected Software

Weaknesses

• Navigating to mk: URL scheme could load Internet Explorer

ADP Enrichment

CVE Program Container

Additional References

• https://www.mozilla.org/security/advisories/mfsa2021-40/
• https://www.mozilla.org/security/advisories/mfsa2021-41/
• https://www.mozilla.org/security/advisories/mfsa2021-38/
• https://www.mozilla.org/security/advisories/mfsa2021-42/
• https://www.mozilla.org/security/advisories/mfsa2021-39/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1721107
• https://security.gentoo.org/glsa/202208-14

References

• https://www.mozilla.org/security/advisories/mfsa2021-40/
• https://www.mozilla.org/security/advisories/mfsa2021-41/
• https://www.mozilla.org/security/advisories/mfsa2021-38/
• https://www.mozilla.org/security/advisories/mfsa2021-42/
• https://www.mozilla.org/security/advisories/mfsa2021-39/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1721107
• https://security.gentoo.org/glsa/202208-14

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