In systemd before v242-rc4, it was discovered that pamsystemd does not properly sanitize the environment before using the XDGSEAT variable. It is possible for an attacker, in some particular configurations, to set a XDGSEAT environment variable which allows for commands to be checked against polkit policies using the "allowactive" element rather than "allow_any".
{
"unresolved_ranges": [
{
"vendor_product": "debian:debian_linux",
"cpes": [
"cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*"
],
"extracted_events": [
{
"last_affected": "8.0"
}
],
"source": "CPE_STRING"
},
{
"vendor_product": "fedoraproject:fedora",
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*"
],
"extracted_events": [
{
"last_affected": "30"
}
],
"source": "CPE_STRING"
},
{
"vendor_product": "redhat:enterprise_linux",
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*"
],
"extracted_events": [
{
"last_affected": "7.0"
}
],
"source": "CPE_STRING"
}
]
}{
"extracted_events": [
{
"introduced": "0"
},
{
"last_affected": "241"
},
{
"last_affected": "242-rc1"
},
{
"last_affected": "242-rc2"
},
{
"last_affected": "242-rc3"
}
],
"source": [
"CPE_RANGE",
"CPE_STRING"
],
"cpe": [
"cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:242:rc1:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:242:rc2:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:242:rc3:*:*:*:*:*:*"
]
}{
"extracted_events": [
{
"introduced": "0"
},
{
"last_affected": "241"
},
{
"last_affected": "242-rc1"
},
{
"last_affected": "242-rc2"
},
{
"last_affected": "242-rc3"
}
],
"cpe": [
"cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:242:rc1:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:242:rc2:*:*:*:*:*:*",
"cpe:2.3:a:systemd_project:systemd:242:rc3:*:*:*:*:*:*"
],
"source": [
"CPE_RANGE",
"CPE_STRING"
]
}