Matthias Gerstner discovered that there was a race condition in the mkhomedir tool shipped with the oddjob package. An authenticated attacker could use this to setup a symlink attack and change permissions on files on the host filesystem.
{
"binaries": [
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{
"binary_name": "oddjob-mkhomedir",
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],
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
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{
"cves": [
{
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
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],
"id": "CVE-2020-10737"
}
],
"ecosystem": "Ubuntu:Pro:16.04:LTS"
}
{
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"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}
{
"cves": [
{
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
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],
"id": "CVE-2020-10737"
}
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"ecosystem": "Ubuntu:Pro:18.04:LTS"
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{
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{
"binary_name": "oddjob-mkhomedir",
"binary_version": "0.34.4-1ubuntu0.1~esm1"
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],
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}
{
"cves": [
{
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
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{
"score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"id": "CVE-2020-10737"
}
],
"ecosystem": "Ubuntu:Pro:20.04:LTS"
}