Debian Security Bug TrackerDEBIANCVE:CVE-2021-43535CVE-2021-43535
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
64.9%
A use-after-free could have occured when an HTTP2 session object was released on a different thread, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 93, Thunderbird < 91.3, and Firefox ESR < 91.3.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| Debian | 999 | all | firefox | < 93.0-1 | firefox_93.0-1_all.deb |
| Debian | 12 | all | firefox-esr | < 91.3.0esr-1 | firefox-esr_91.3.0esr-1_all.deb |
| Debian | 11 | all | firefox-esr | < 91.4.1esr-1~deb11u1 | firefox-esr_91.4.1esr-1~deb11u1_all.deb |
| Debian | 10 | all | firefox-esr | < 91.3.0esr-1 | firefox-esr_91.3.0esr-1_all.deb |
| Debian | 999 | all | firefox-esr | < 91.3.0esr-1 | firefox-esr_91.3.0esr-1_all.deb |
| Debian | 13 | all | firefox-esr | < 91.3.0esr-1 | firefox-esr_91.3.0esr-1_all.deb |
| Debian | 12 | all | thunderbird | < 1:91.3.0-1 | thunderbird_1:91.3.0-1_all.deb |
| Debian | 11 | all | thunderbird | < 1:91.4.1-1~deb11u1 | thunderbird_1:91.4.1-1~deb11u1_all.deb |
| Debian | 10 | all | thunderbird | < 1:91.4.1-1~deb10u1 | thunderbird_1:91.4.1-1~deb10u1_all.deb |
| Debian | 999 | all | thunderbird | < 1:91.3.0-1 | thunderbird_1:91.3.0-1_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
64.9%