USN-5591-4

It was discovered that the virtual terminal driver in the Linux kernel did not properly handle VGA console font changes, leading to an out-of-bounds write. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

References

Affected packages

Ubuntu:18.04:LTS / linux-aws

Package

Name: linux-aws
Purl: pkg:deb/ubuntu/linux-aws@4.15.0-1140.151?arch=source&distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

4.15.0-1140.151

Affected versions

4.*

4.15.0-1001.1

4.15.0-1003.3

4.15.0-1005.5

4.15.0-1006.6

4.15.0-1007.7

4.15.0-1009.9

4.15.0-1010.10

4.15.0-1011.11

4.15.0-1016.16

4.15.0-1017.17

4.15.0-1019.19

4.15.0-1020.20

4.15.0-1021.21

4.15.0-1023.23

4.15.0-1025.25

4.15.0-1027.27

4.15.0-1029.30

4.15.0-1031.33

4.15.0-1032.34

4.15.0-1033.35

4.15.0-1034.36

4.15.0-1035.37

4.15.0-1037.39

4.15.0-1039.41

4.15.0-1040.42

4.15.0-1041.43

4.15.0-1043.45

4.15.0-1044.46

4.15.0-1045.47

4.15.0-1047.49

4.15.0-1048.50

4.15.0-1050.52

4.15.0-1051.53

4.15.0-1052.54

4.15.0-1054.56

4.15.0-1056.58

4.15.0-1057.59

4.15.0-1058.60

4.15.0-1060.62

4.15.0-1063.67

4.15.0-1065.69

4.15.0-1066.70

4.15.0-1067.71

4.15.0-1073.77

4.15.0-1076.80

4.15.0-1077.81

4.15.0-1079.83

4.15.0-1080.84

4.15.0-1082.86

4.15.0-1083.87

4.15.0-1086.91

4.15.0-1087.92

4.15.0-1088.93

4.15.0-1090.95

4.15.0-1091.96

4.15.0-1092.98

4.15.0-1093.99

4.15.0-1094.101

4.15.0-1095.102

4.15.0-1096.103

4.15.0-1097.104

4.15.0-1098.105

4.15.0-1099.106

4.15.0-1101.108

4.15.0-1102.109

4.15.0-1103.110

4.15.0-1106.113

4.15.0-1109.116

4.15.0-1110.117

4.15.0-1111.118

4.15.0-1112.119

4.15.0-1114.121

4.15.0-1115.122

4.15.0-1116.123

4.15.0-1118.125

4.15.0-1119.127

4.15.0-1121.129

4.15.0-1123.132

4.15.0-1124.133

4.15.0-1126.135

4.15.0-1127.136

4.15.0-1128.137

4.15.0-1130.139

4.15.0-1133.143

4.15.0-1136.147

4.15.0-1137.148

4.15.0-1139.150

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "4.15.0-1140.151",
            "binary_name": "linux-aws-cloud-tools-4.15.0-1140"
        },
        {
            "binary_version": "4.15.0-1140.151",
            "binary_name": "linux-aws-headers-4.15.0-1140"
        },
        {
            "binary_version": "4.15.0-1140.151",
            "binary_name": "linux-aws-tools-4.15.0-1140"
        },
        {
            "binary_version": "4.15.0-1140.151",
            "binary_name": "linux-buildinfo-4.15.0-1140-aws"
        },
        {
            "binary_version": "4.15.0-1140.151",
            "binary_name": "linux-cloud-tools-4.15.0-1140-aws"
        },
        {
            "binary_version": "4.15.0-1140.151",
            "binary_name": "linux-headers-4.15.0-1140-aws"
        },
        {
            "binary_version": "4.15.0-1140.151",
            "binary_name": "linux-image-unsigned-4.15.0-1140-aws"
        },
        {
            "binary_version": "4.15.0-1140.151",
            "binary_name": "linux-modules-4.15.0-1140-aws"
        },
        {
            "binary_version": "4.15.0-1140.151",
            "binary_name": "linux-modules-extra-4.15.0-1140-aws"
        },
        {
            "binary_version": "4.15.0-1140.151",
            "binary_name": "linux-tools-4.15.0-1140-aws"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:18.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2021-33656"
        }
    ]
}