A flaw was found in SSSD. The extract_authtok_v1() function in the PAM responder does not validate the auth_token_length field against the remaining buffer size before processing. A local attacker can exploit this via a crafted protocol v1 request to the PAM responder socket, causing an out-of-bounds read and process crash, resulting in a denial of service.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 6
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Fedoraproject Sssd
cpe:2.3:a:fedoraproject:sssd:-:*:*:*:*:*:*:*
|
— | — |
|
Redhat Openshift_Container_Platform
cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
|
— | — |
|
Redhat Enterprise_Linux
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
|
— | — |
|
Redhat Enterprise_Linux
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
|
— | — |
|
Redhat Enterprise_Linux
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
|
— | — |
|
Redhat Enterprise_Linux
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
|
— | — |