7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.01 Low
EPSS
Percentile
83.1%
Apache HTTP Server protocol handler for the HTTP/2 protocol checks received request headers against the size limitations as configured for the server and used for the HTTP/1 protocol as well. On violation of these restrictions and HTTP response is sent to the client with a status code indicating why the request was rejected. This rejection response was not fully initialised in the HTTP/2 protocol handler if the offending header was the very first one received or appeared in a a footer. This led to a NULL pointer dereference on initialised memory, crashing reliably the child process. Since such a triggering HTTP/2 request is easy to craft and submit, this can be exploited to DoS the server. This issue affected mod_http2 1.15.17 and Apache HTTP Server version 2.4.47 only. Apache HTTP Server 2.4.47 was never released.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Alpine | edge-main | noarch | apache2 | < 2.4.48-r0 | UNKNOWN |
Alpine | 3.10-main | noarch | apache2 | < 2.4.48-r0 | UNKNOWN |
Alpine | 3.11-main | noarch | apache2 | < 2.4.48-r0 | UNKNOWN |
Alpine | 3.12-main | noarch | apache2 | < 2.4.48-r0 | UNKNOWN |
Alpine | 3.13-main | noarch | apache2 | < 2.4.48-r0 | UNKNOWN |
Alpine | 3.14-main | noarch | apache2 | < 2.4.48-r0 | UNKNOWN |
Alpine | 3.15-main | noarch | apache2 | < 2.4.48-r0 | UNKNOWN |
Alpine | 3.16-main | noarch | apache2 | < 2.4.48-r0 | UNKNOWN |
Alpine | 3.17-main | noarch | apache2 | < 2.4.48-r0 | UNKNOWN |
Alpine | 3.18-main | noarch | apache2 | < 2.4.48-r0 | UNKNOWN |
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.01 Low
EPSS
Percentile
83.1%