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Vulnerability Details : CVE-2021-38503

The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypass restrictions such as executing scripts or navigating the top-level frame. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
Publish Date : 2021-12-08 Last Update Date : 2022-03-16
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- CVSS Scores & Vulnerability Types

CVSS Score
7.5
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Bypass a restriction or similar
CWE ID 863

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2021:4116: firefox security update (Important) oval:com.redhat.rhsa:def:20214116 unix
RHSA-2021:4123: firefox security update (Important) oval:com.redhat.rhsa:def:20214123 unix
RHSA-2021:4130: thunderbird security update (Important) oval:com.redhat.rhsa:def:20214130 unix
RHSA-2021:4134: thunderbird security update (Important) oval:com.redhat.rhsa:def:20214134 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2021-38503

# Product Type Vendor Product Version Update Edition Language
1 OS Debian Debian Linux 9.0 * * * Version Details Vulnerabilities
2 OS Debian Debian Linux 10.0 * * * Version Details Vulnerabilities
3 OS Debian Debian Linux 11.0 * * * Version Details Vulnerabilities
4 Application Mozilla Firefox * * * * Version Details Vulnerabilities
5 Application Mozilla Firefox Esr * * * * Version Details Vulnerabilities
6 Application Mozilla Thunderbird * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Debian Debian Linux 3
Mozilla Firefox 1
Mozilla Firefox Esr 1
Mozilla Thunderbird 1

- References For CVE-2021-38503

https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html
MLIST [debian-lts-announce] 20220104 [SECURITY] [DLA 2874-1] thunderbird security update
https://www.mozilla.org/security/advisories/mfsa2021-50/
https://www.mozilla.org/security/advisories/mfsa2021-49/
https://www.mozilla.org/security/advisories/mfsa2021-48/
https://www.debian.org/security/2021/dsa-5026
DEBIAN DSA-5026
https://www.debian.org/security/2022/dsa-5034
DEBIAN DSA-5034
https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html
MLIST [debian-lts-announce] 20211229 [SECURITY] [DLA 2863-1] firefox-esr security update
https://security.gentoo.org/glsa/202202-03
GENTOO GLSA-202202-03
https://bugzilla.mozilla.org/show_bug.cgi?id=1729517

- Metasploit Modules Related To CVE-2021-38503

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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