Debian Security Bug TrackerDEBIANCVE:CVE-2020-26959CVE-2020-26959
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
0.003 Low
EPSS
Percentile
69.8%
During browser shutdown, reference decrementing could have occured on a previously freed object, resulting in a use-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| Debian | 999 | all | firefox | < 83.0-1 | firefox_83.0-1_all.deb |
| Debian | 12 | all | firefox-esr | < 78.5.0esr-1 | firefox-esr_78.5.0esr-1_all.deb |
| Debian | 11 | all | firefox-esr | < 78.5.0esr-1 | firefox-esr_78.5.0esr-1_all.deb |
| Debian | 10 | all | firefox-esr | < 78.5.0esr-1~deb10u1 | firefox-esr_78.5.0esr-1~deb10u1_all.deb |
| Debian | 999 | all | firefox-esr | < 78.5.0esr-1 | firefox-esr_78.5.0esr-1_all.deb |
| Debian | 13 | all | firefox-esr | < 78.5.0esr-1 | firefox-esr_78.5.0esr-1_all.deb |
| Debian | 12 | all | thunderbird | < 1:78.5.0-1 | thunderbird_1:78.5.0-1_all.deb |
| Debian | 11 | all | thunderbird | < 1:78.5.0-1 | thunderbird_1:78.5.0-1_all.deb |
| Debian | 10 | all | thunderbird | < 1:78.5.0-1~deb10u1 | thunderbird_1:78.5.0-1~deb10u1_all.deb |
| Debian | 999 | all | thunderbird | < 1:78.5.0-1 | thunderbird_1:78.5.0-1_all.deb |
Related
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
0.003 Low
EPSS
Percentile
69.8%