9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.974 High
EPSS
Percentile
99.9%
Debian LTS Advisory DLA-2776-1 [email protected]
https://www.debian.org/lts/security/ Sylvain Beucler
October 02, 2021 https://wiki.debian.org/LTS
Package : apache2
Version : 2.4.25-3+deb9u11
CVE ID : CVE-2021-34798 CVE-2021-39275 CVE-2021-40438
Several vulnerabilities were discovered in the Apache HTTP server.
An attacker could send proxied requests to arbitrary servers, corrupt
memory in some setups involving third-party modules, and cause the
server to crash.
CVE-2021-34798
Malformed requests may cause the server to dereference
a NULL pointer.
CVE-2021-39275
ap_escape_quotes() may write beyond the end of a buffer when given
malicious input. No included modules pass untrusted data to these
functions, but third-party / external modules may.
CVE-2021-40438
A crafted request uri-path can cause mod_proxy to forward the
request to an origin server choosen by the remote user.
For Debian 9 stretch, these problems have been fixed in version
2.4.25-3+deb9u11.
We recommend that you upgrade your apache2 packages.
For the detailed security status of apache2 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/apache2
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 9 | all | apache2 | <Â 2.4.25-3+deb9u11 | apache2_2.4.25-3+deb9u11_all.deb |
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.974 High
EPSS
Percentile
99.9%