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
9.2 High
AI Score
Confidence
Low
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
0.689 Medium
EPSS
Percentile
98.0%
USN-4994-1 fixed several vulnerabilities in Apache. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.
Original advisory details:
Antonio Morales discovered that the Apache mod_auth_digest module
incorrectly handled certain Digest nonces. A remote attacker could possibly
use this issue to cause Apache to crash, resulting in a denial of service.
(CVE-2020-35452)
Antonio Morales discovered that the Apache mod_session module incorrectly
handled certain Cookie headers. A remote attacker could possibly use this
issue to cause Apache to crash, resulting in a denial of service.
(CVE-2021-26690)
Christophe Jaillet discovered that the Apache mod_session module
incorrectly handled certain SessionHeader values. A remote attacker could
use this issue to cause Apache to crash, resulting in a denial of service,
or possibly execute arbitrary code. (CVE-2021-26691)
Christoph Anton Mitterer discovered that the new MergeSlashes configuration
option resulted in unexpected behaviour in certain situations.
(CVE-2021-30641)
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Ubuntu | 16.04 | noarch | apache2 | < 2.4.18-2ubuntu3.17+esm1 | UNKNOWN |
Ubuntu | 16.04 | noarch | apache2 | < 2.4.18-2ubuntu3.17 | UNKNOWN |
Ubuntu | 16.04 | noarch | apache2-bin | < 2.4.18-2ubuntu3.17 | UNKNOWN |
Ubuntu | 16.04 | noarch | apache2-bin-dbgsym | < 2.4.18-2ubuntu3.17 | UNKNOWN |
Ubuntu | 16.04 | noarch | apache2-data | < 2.4.18-2ubuntu3.17 | UNKNOWN |
Ubuntu | 16.04 | noarch | apache2-dbg | < 2.4.18-2ubuntu3.17 | UNKNOWN |
Ubuntu | 16.04 | noarch | apache2-dbgsym | < 2.4.18-2ubuntu3.17 | UNKNOWN |
Ubuntu | 16.04 | noarch | apache2-dev | < 2.4.18-2ubuntu3.17 | UNKNOWN |
Ubuntu | 16.04 | noarch | apache2-dev-dbgsym | < 2.4.18-2ubuntu3.17 | UNKNOWN |
Ubuntu | 16.04 | noarch | apache2-doc | < 2.4.18-2ubuntu3.17 | UNKNOWN |
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
9.2 High
AI Score
Confidence
Low
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
0.689 Medium
EPSS
Percentile
98.0%