6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
0.002 Low
EPSS
Percentile
59.4%
The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to TLS while retaining the visual properties of an HTTP connection, including being same-origin with unencrypted connections on port 80. However, if a second encrypted port on the same IP address (e.g. port 8443) did not opt-in to opportunistic encryption; a network attacker could forward a connection from the browser to port 443 to port 8443, causing the browser to treat the content of port 8443 as same-origin with HTTP. This was resolved by disabling the Opportunistic Encryption feature, which had low usage. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Alpine | edge-community | noarch | firefox-esr | < 91.3.0-r0 | UNKNOWN |
Alpine | edge-community | noarch | firefox | < 94.0-r0 | UNKNOWN |
Alpine | edge-community | noarch | thunderbird | < 91.3.2-r0 | UNKNOWN |
Alpine | 3.15-community | noarch | firefox-esr | < 91.3.0-r0 | UNKNOWN |
Alpine | 3.15-community | noarch | firefox | < 94.0-r0 | UNKNOWN |
Alpine | 3.16-community | noarch | firefox-esr | < 91.3.0-r0 | UNKNOWN |
Alpine | 3.16-community | noarch | firefox | < 94.0-r0 | UNKNOWN |
Alpine | 3.16-community | noarch | thunderbird | < 91.3.2-r0 | UNKNOWN |
Alpine | 3.17-community | noarch | firefox-esr | < 91.3.0-r0 | UNKNOWN |
Alpine | 3.17-community | noarch | firefox | < 94.0-r0 | UNKNOWN |
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
0.002 Low
EPSS
Percentile
59.4%