CVE-2020-15673

HIGH
8.8
CVSS Score
Published: October 1, 2020 at 06:39 PM UTC
Updated: June 17, 2026 at 02:57 AM UTC
5 products affected across 3 vendorsDebian LinuxFirefoxThunderbird

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Severity
HIGH8.8
Exploit prediction
EPSS 2%

Description

Mozilla developers reported memory safety bugs present in Firefox 80 and Firefox ESR 78.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 81
Affected range stops below 81, so it looks safe — our inference, not a vendor statement
Affected range stops below 81.0, so it looks safe — our inference, not a vendor statement
v < 78.3
Affected range stops below 78.3, so it looks safe — our inference, not a vendor statement
v < 78.3
Affected range stops below 78.3, so it looks safe — our inference, not a vendor statement

References (9)

Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00074.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00077.html
x_refsource_MISCBroken LinkIssue TrackingVendor Advisory
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1648493%2C1660800
Mailing Listx_refsource_MLISTThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/10/msg00020.html
Vendor Advisoryx_refsource_GENTOOThird Party Advisory
https://security.gentoo.org/glsa/202010-02
Vendor Advisoryx_refsource_DEBIANThird Party Advisory
https://www.debian.org/security/2020/dsa-4770
x_refsource_MISCRelease NotesVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-42/
x_refsource_MISCRelease NotesVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-43/

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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