CVE-2020-12420
HIGH
8.8
CVSS Score
Published: July 9, 2020 at 02:39 PM UTC
Updated: June 17, 2026 at 02:51 AM UTC
5 products affected across 3 vendorsUbuntu LinuxFirefoxThunderbird
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Severity
HIGH8.8
Exploit prediction
EPSS 2%
Description
When trying to connect to a STUN server, a race condition could have caused a use-after-free of a pointer, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Ubuntu Linux· Canonicalrubygems
95%v < 78v < 78.0
Affected range stops below 78, so it looks safe — our inference, not a vendor statement
Affected range stops below 78.0, so it looks safe — our inference, not a vendor statement
v < 68.10v < 68.10.0
Affected range stops below 68.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 68.10.0, so it looks safe — our inference, not a vendor statement
v < 68.10.0
Affected range stops below 68.10.0, so it looks safe — our inference, not a vendor statement
Leap· openSUSEdrupal
95%Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00023.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00026.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html
- https://bugzilla.mozilla.org/show_bug.cgi?id=1643437
References (11)
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00023.htmlVendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00026.htmlVendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.htmlVendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.htmlx_refsource_MISCExploitIssue TrackingVendor Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1643437Vendor Advisoryx_refsource_GENTOOThird Party Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202007-09Vendor Advisoryx_refsource_GENTOOThird Party Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202007-10Vendor Advisoryx_refsource_UBUNTUThird Party Advisory
Source: [email protected]
https://usn.ubuntu.com/4421-1/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-362CWE-416
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