USN-5591-2

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:Pro:16.04:LTS / linux-aws-hwe

Package

Name: linux-aws-hwe
Purl: pkg:deb/ubuntu/linux-aws-hwe@4.15.0-1140.151~16.04.1?arch=source&distro=esm-infra/xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

4.15.0-1140.151~16.04.1

Affected versions

4.*

4.15.0-1030.31~16.04.1

4.15.0-1031.33~16.04.1

4.15.0-1032.34~16.04.1

4.15.0-1033.35~16.04.1

4.15.0-1035.37~16.04.1

4.15.0-1036.38~16.04.1

4.15.0-1039.41~16.04.1

4.15.0-1040.42~16.04.1

4.15.0-1041.43~16.04.1

4.15.0-1043.45~16.04.1

4.15.0-1044.46~16.04.1

4.15.0-1045.47~16.04.1

4.15.0-1047.49~16.04.1

4.15.0-1048.50~16.04.1

4.15.0-1050.52~16.04.1

4.15.0-1051.53~16.04.1

4.15.0-1052.54~16.04.1

4.15.0-1054.56~16.04.1

4.15.0-1056.58~16.04.1

4.15.0-1057.59~16.04.1

4.15.0-1058.60~16.04.1

4.15.0-1060.62~16.04.1

4.15.0-1063.67~16.04.1

4.15.0-1065.69~16.04.1

4.15.0-1066.70~16.04.1

4.15.0-1067.71~16.04.1

4.15.0-1073.77~16.04.1

4.15.0-1074.78~16.04.1

4.15.0-1079.83~16.04.1

4.15.0-1080.84~16.04.1

4.15.0-1082.86~16.04.1

4.15.0-1083.87~16.04.1

4.15.0-1085.90~16.04.1

4.15.0-1088.93~16.04.1

4.15.0-1090.95~16.04.1

4.15.0-1091.96~16.04.1

4.15.0-1093.99~16.04.1

4.15.0-1094.101~16.04.1

4.15.0-1095.102~16.04.1

4.15.0-1096.103~16.04.1

4.15.0-1097.104~16.04.1

4.15.0-1098.105~16.04.1

4.15.0-1099.106~16.04.1

4.15.0-1102.109~16.04.1

4.15.0-1103.110~16.04.1

4.15.0-1106.113~16.04.1

4.15.0-1109.116~16.04.1

4.15.0-1110.117~16.04.1

4.15.0-1111.118~16.04.1

4.15.0-1112.119~16.04.1

4.15.0-1113.120~16.04.1

4.15.0-1115.122~16.04.1

4.15.0-1116.123~16.04.1

4.15.0-1118.125~16.04.1

4.15.0-1119.126~16.04.2

4.15.0-1120.128~16.04.1

4.15.0-1123.132~16.04.1

4.15.0-1124.133~16.04.1

4.15.0-1126.135~16.04.2

4.15.0-1127.136~16.04.1

4.15.0-1128.137~16.04.1

4.15.0-1130.139~16.04.1

4.15.0-1133.143~16.04.1

4.15.0-1136.147~16.04.1

4.15.0-1137.148~16.04.1

4.15.0-1139.150~16.04.1

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "4.15.0-1140.151~16.04.1",
            "binary_name": "linux-aws-headers-4.15.0-1140"
        },
        {
            "binary_version": "4.15.0-1140.151~16.04.1",
            "binary_name": "linux-aws-hwe-cloud-tools-4.15.0-1140"
        },
        {
            "binary_version": "4.15.0-1140.151~16.04.1",
            "binary_name": "linux-aws-hwe-tools-4.15.0-1140"
        },
        {
            "binary_version": "4.15.0-1140.151~16.04.1",
            "binary_name": "linux-buildinfo-4.15.0-1140-aws"
        },
        {
            "binary_version": "4.15.0-1140.151~16.04.1",
            "binary_name": "linux-cloud-tools-4.15.0-1140-aws"
        },
        {
            "binary_version": "4.15.0-1140.151~16.04.1",
            "binary_name": "linux-headers-4.15.0-1140-aws"
        },
        {
            "binary_version": "4.15.0-1140.151~16.04.1",
            "binary_name": "linux-image-unsigned-4.15.0-1140-aws"
        },
        {
            "binary_version": "4.15.0-1140.151~16.04.1",
            "binary_name": "linux-modules-4.15.0-1140-aws"
        },
        {
            "binary_version": "4.15.0-1140.151~16.04.1",
            "binary_name": "linux-modules-extra-4.15.0-1140-aws"
        },
        {
            "binary_version": "4.15.0-1140.151~16.04.1",
            "binary_name": "linux-tools-4.15.0-1140-aws"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5591-2.json"

cves_map

{
    "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"
        }
    ],
    "ecosystem": "Ubuntu:Pro:16.04:LTS"
}