Ubuntu.comUB:CVE-2021-20177CVE-2021-20177
4.4 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
2.1 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:N/I:N/A:P
0.0004 Low
EPSS
Percentile
11.8%
A flaw was found in the Linux kernel’s implementation of string matching
within a packet. A privileged user (with root or CAP_NET_ADMIN) when
inserting iptables rules could insert a rule which can panic the system.
Kernel before kernel 5.5-rc1 is affected.
Bugs
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 20.04 | noarch | linux | < 5.4.0-66.74 | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-aws | < 5.4.0-1038.40 | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-aws-5.4 | < 5.4.0-1038.40~18.04.1 | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-azure | < 5.4.0-1040.42 | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-azure-5.4 | < 5.4.0-1040.42~18.04.1 | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-azure-fde | < 5.4.0-1040.42 | UNKNOWN |
| ubuntu | 22.04 | noarch | linux-azure-fde | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-bluefield | < 5.4.0-1011.14 | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-gcp | < 5.4.0-1037.40 | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-gcp-5.4 | < 5.4.0-1037.40~18.04.1 | UNKNOWN |
Related
4.4 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
2.1 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:N/I:N/A:P
0.0004 Low
EPSS
Percentile
11.8%