HOME VULNERABILITIESCVE-2020-12417

HIGH

CVE-2020-12417

CWE-617Published: July 9, 2020· Updated: Jun 17, 2026

8.8

CVSS v3.1

Official Description

Due to confusion about ValueTags on JavaScript Objects, an object may pass through the type barrier, resulting in memory corruption and a potentially exploitable crash. *Note: this issue only affects Firefox on ARM64 platforms.* This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.

Technical Analysis

CVE-2020-12417 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected Vendors & Products

Canonical1 product(s)

ubuntu linux

Mozilla3 product(s)

firefoxfirefox esrthunderbird

openSUSE1 product(s)

leap

Source: NVD CPE · 9 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00023.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00026.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html

ADVISORYhttps://bugzilla.mozilla.org/show_bug.cgi?id=1640737

ADVISORYhttps://security.gentoo.org/glsa/202007-09

ADVISORYhttps://security.gentoo.org/glsa/202007-10

ADVISORYhttps://usn.ubuntu.com/4421-1/

ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2020-24/

ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2020-25/

ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2020-26/

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00023.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00026.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html

ADVISORYhttps://bugzilla.mozilla.org/show_bug.cgi?id=1640737

ADVISORYhttps://security.gentoo.org/glsa/202007-09

ADVISORYhttps://security.gentoo.org/glsa/202007-10

ADVISORYhttps://usn.ubuntu.com/4421-1/

ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2020-24/

ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2020-25/

ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2020-26/

All References (22)

→

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00023.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00026.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.htmlMailing List · Third Party Advisory

→

https://bugzilla.mozilla.org/show_bug.cgi?id=1640737Exploit · Issue Tracking · Vendor Advisory

→

https://security.gentoo.org/glsa/202007-09Third Party Advisory

→

https://security.gentoo.org/glsa/202007-10Third Party Advisory

→

https://usn.ubuntu.com/4421-1/Third Party Advisory

→

https://www.mozilla.org/security/advisories/mfsa2020-24/Vendor Advisory

→

https://www.mozilla.org/security/advisories/mfsa2020-25/Vendor Advisory

→

https://www.mozilla.org/security/advisories/mfsa2020-26/Vendor Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00023.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00026.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.htmlMailing List · Third Party Advisory

Quick Facts

CVE IDCVE-2020-12417

CVSS Score8.8 / 10

SeverityHIGH

WeaknessCWE-617

CISA KEVNo

Affected3 vendor(s)

PublishedJul 9, 2020

Related CVEs (CWE-617)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2020-12417 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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