High severity · published Apr 24, 2020
CVE-2020-6822
On 32-bit builds, an out of bounds write could have occurred when processing an image larger than 4 GB in <code>GMPDecodeData</code>
8.8
CVSS
1.3%
EPSS
No
On KEV
Description
On 32-bit builds, an out of bounds write could have occurred when processing an image larger than 4 GB in <code>GMPDecodeData</code>. It is possible that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 68.7.0, Firefox ESR < 68.7, and Firefox < 75.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 71% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 75.0 · source: NVD
FE
Firefox Esr · Mozilla
before 68.7.0 · source: NVD
TH
Thunderbird · Mozilla
before 68.7.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-6822
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-6822
Issue Tracking
https://bugzilla.mozilla.org/show_bug.cgi?id=1544181
Third Party Advisory
https://usn.ubuntu.com/4335-1/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-12/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-13/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-14/
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