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Medium 5.5
Sssd: sssd-kcm: local denial of service via excessive memory preallocation
A flaw was found in `sssd-kcm`. A local user or process able to connect to the `sssd-kcm` UNIX socket can exploit this vulnerability. By sending a large request length header and then stalling the connection, an attacker can cause the system to preallocate si…
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Medium 4.7
Sssd: sssd: denial of service via race condition in autofs responder
A flaw was found in SSSD. A local user can trigger a Denial of Service (DoS) by exploiting a race condition in the autofs responder between asynchronous enumeration completion and map invalidation. By repeatedly sending concurrent map enumeration and invalida…
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Medium 6.2
Sssd: sssd: denial of service via incomplete identity provider authentication requests
A flaw was found in SSSD (System Security Services Daemon). When Identity Provider (IdP) authentication is enabled, pre-authentication requests retain state in memory without being cleared or timed out. A local attacker can repeatedly initiate authentication …
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Medium 6.8
Sssd: sssd: authorization bypass via cross-domain username collision in hbac evaluation
A flaw was found in SSSD. In trust-enabled identity management environments, SSSD evaluates Host-Based Access Control (HBAC) rules by stripping domain qualifiers and comparing only short usernames. An authenticated user in a trusted domain who shares the same…
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Medium 5.3
Sssd: sssd: information disclosure via query injection in entra id lookups
A flaw was found in SSSD. When configured to use Microsoft Entra ID, search inputs are not properly sanitized before being incorporated into directory query filters. A local user can exploit this vulnerability by submitting a crafted lookup request, manipulat…
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Medium 4.7
Sssd: sssd: denial of service via responder connection retry loop during file descriptor exhaustion
A flaw was found in sssd. A local user can cause a Denial of Service (DoS) by exhausting the responder service's available file descriptors (system handles used for open connections). By opening and maintaining many concurrent connections to a responder socke…
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Medium 6.2
Sssd: sssd: denial of service via crafted passkey kerberos authentication request
A flaw was found in sssd. A local attacker can trigger a Denial of Service (DoS) by sending a specially crafted Pluggable Authentication Module (PAM) request when passkey authentication is enabled. Due to a missing state validation check in passkey Kerberos h…
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Medium 5.5
Sssd: sssd: denial of service via undersized packet parsing in nss responder
A flaw was found in SSSD. A local attacker with access to the Name Service Switch (NSS) responder UNIX socket can trigger an integer underflow by sending a specially crafted request with an undersized packet header. This issue causes an out-of-bounds memory r…
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Medium 5.5
Sssd: sssd: denial of service via out-of-bounds read in pam responder
A flaw was found in sssd. A local attacker can cause a Denial of Service (DoS) by sending a crafted Pluggable Authentication Module (PAM) request containing a zero-length authentication token to the responder socket. Due to missing input validation, the servi…
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Medium 5.5
Sssd: sssd: denial of service via unbounded negative cache growth
A flaw was found in SSSD. An unprivileged local user can repeatedly request lookups for nonexistent entries through the Name Service Switch (NSS) responder. Because the negative cache does not limit the total number of stored entries and only removes expired …
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Medium 4.7
Sssd: sssd: denial of service via stale connection state reuse in pam gssapi responder
A flaw was found in SSSD. A local user can cause a denial of service (DoS) by disrupting system authentication services. When handling Generic Security Services Application Programming Interface (GSSAPI) authentication in the Pluggable Authentication Module (…
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Medium 5.9
Sssd: sssd: denial of service via missing sid extension in certificate mapping
A flaw was found in sssd. A remote attacker can cause a denial of service (DoS) by submitting a certificate that lacks an expected Security Identifier (SID) extension. In deployments configured with SID-based certificate mapping rules, the service fails to ve…
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Medium 5.5
Sssd: sssd: denial of service via packet length underflow in autofs responder
A flaw was found in SSSD. A local attacker can exploit this issue by sending a specially crafted request with an invalid packet length to the autofs responder UNIX socket. This causes an integer underflow and an out-of-bounds memory read, which can crash the …
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Medium 6.8
Sssd: sssd: access control bypass via premature ldap access rule evaluation
A flaw was found in SSSD. When configured to evaluate password expiration warnings before restrictive access rules in LDAP (Lightweight Directory Access Protocol) environments, an expired-password warning terminates rule evaluation early and treats the access…
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Medium 5.8
Sssd: sssd: denial of service via out-of-bounds write in nfs idmap plugin
A flaw was found in SSSD's NFS idmap plugin. When retrieving cached user or group names, the plugin detects if an entry exceeds the destination buffer size but fails to abort before copying data. A local attacker can trigger this vulnerability by requesting i…
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Medium 5.5
Sssd: sssd: denial of service via memory exhaustion in kcm responder
A flaw was found in SSSD. An issue in the Kerberos Credential Manager (KCM) responder allows a local user to cause a Denial of Service (DoS) by maintaining a persistent connection and repeatedly storing and destroying credentials. Because the service fails to…
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Medium 4.7
Sssd: sssd: denial of service via use-after-free in kcm ticket renewal
A flaw was found in SSSD. A use-after-free vulnerability exists in the Kerberos Credential Manager (KCM) responder during Kerberos ticket-granting ticket (TGT) renewal, where a deferred callback accesses memory that has already been released. An authenticated…
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Medium 5.4
Sssd: sssd: access control bypass via improper ldap shadow expiration check
A flaw was found in SSSD. When configured to enforce account expiration using LDAP (Lightweight Directory Access Protocol) shadow attributes, SSSD fails to treat an expiration value of zero as an expired account. A user with valid credentials for an expired a…
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Medium 5.5
Sssd: sssd: denial of service via unprivileged autofs cache invalidation
A flaw was found in SSSD. An unprivileged local user can repeatedly request master automount map updates through the autofs responder due to missing authorization checks. This triggers global cache invalidation and forces repeated lookups to backend directory…
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Medium 5.5
Sssd: sssd: denial of service via memory exhaustion in autofs responder
A flaw was found in SSSD. In configurations where the autofs responder service is enabled, memory allocated during successful request processing is not released until the client connection terminates. A local attacker can exploit this vulnerability by maintai…
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Low 3.3
Sssd: sssd: denial of service via out-of-bounds read in autofs responder
A flaw was found in SSSD. A local attacker can exploit this vulnerability by sending a specially crafted request to the autofs responder UNIX socket. Due to improper buffer offset calculation during request parsing, the service performs an out-of-bounds memor…
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Medium 5.5
Sssd: sssd: denial of service via out-of-bounds read during passkey parsing
A flaw was found in sssd. This vulnerability allows a local user to cause a Denial of Service (DoS) by submitting a specially crafted passkey authentication token that lacks null terminators. The authentication service reads past the end of the provided memor…
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Medium 5.4
Sssd: sssd: fail-open in ldap ppolicy access check allows continued authorization
A flaw was found in SSSD. When configured with the LDAP access provider and `ldap_access_order` including `ppolicy` or `lockout`, a fail-open condition in the LDAP ppolicy access check can occur if a user lookup returns zero results. This can incorrectly retu…
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Medium 4.0
Sssd: sssd: denial of service in nss responder via crafted zero-length requests
A flaw was found in sssd. A local unprivileged user could send a specially crafted request with a zero-length body to the Network Security Services (NSS) responder. This could lead to a denial-of-service condition, causing the NSS responder to become unstable…
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Medium 5.5
Sssd: sssd: local denial of service due to null pointer dereference in pam responder
A flaw was found in SSSD (System Security Services Daemon). A local attacker with privileges to connect to the PAM (Pluggable Authentication Modules) responder socket can send a specially crafted protocol request. If the `pam_app_services` configuration is en…
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Medium 4.0
Sssd: sssd: denial of service via malformed pam v1 requests
A flaw was found in sssd, specifically within the PAM (Pluggable Authentication Modules) responder's protocol v1 parser, pam_parse_in_data(). A local client with access to the PAM responder's UNIX socket can exploit this by negotiating protocol v1 and sending…
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Medium 4.0
Sssd: local oob read in nss service request parsers (`sss_nss_protocol_parse_svc_name` / `sss_nss_protocol_parse_svc_port`)
A flaw was found in the sssd NSS responder. This input validation vulnerability allows a local attacker, by sending specially crafted service lookup requests to the NSS responder's UNIX socket, to cause an out-of-bounds read. This out-of-bounds read may lead …
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High 7.5
Sssd: sssd: idp authentication prefix comparison allows cross-user impersonation
A flaw was found in SSSD's IdP authentication provider. The eval_access_token_buf() function compares the OIDC subject identifier using strncmp() with the authenticated user's identifier length, performing a prefix comparison instead of an exact match. An att…
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Medium 5.5
Sssd: sssd: pam responder out-of-bounds read via unchecked auth_token_length in protocol v1
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 …
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Low 3.3
Sssd: sssd: nss responder uninitialized heap disclosure in initgroups reply
A flaw was found in SSSD. The sss_nss_protocol_fill_initgr() function in the NSS responder pre-allocates reply space for all group entries but does not shrink the packet when groups are skipped, causing uninitialized heap bytes to be transmitted to the client…
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Medium 5.5
Sssd: sssd: nss responder out-of-bounds read via unchecked addrlen in gethostbyaddr
A flaw was found in SSSD. The sss_nss_protocol_parse_addr() function in the NSS responder does not validate the addrlen field against the remaining packet body size. A local attacker can exploit this via a crafted GETHOSTBYADDR request to the NSS responder so…
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High 8.0
Sssd: sssd: gpo cache path traversal via unsanitized gpcfilesyspath allows kerberos authentication bypass
A path traversal flaw was found in SSSD's AD GPO provider. The ad_gpo_extract_smb_components() function does not sanitize .. sequences in the gPCFileSysPath LDAP attribute, allowing an attacker with AD GPO management access to write files outside the GPO cach…
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High 8.8
Sssd: sssd: sudo ldap provider searches entire directory tree for sudorole objects by default, enabling privilege escalation
A flaw was found in SSSD's LDAP sudo provider. When the ldap_sudo_search_base option is not explicitly configured, SSSD searches the entire LDAP directory tree for sudoRole objects. An authenticated attacker with write access to any subtree can inject a sudoR…
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Medium 6.4
Sssd: use-after-free crash in sssd' 'sssd_pam' process
A flaw was found in sssd. When authenticating with a YubiKey, the SSSD PAM responder can crash due to a use-after-free vulnerability, where a memory pointer is incorrectly handled. A local attacker could exploit this flaw by manipulating smartcard or YubiKey …
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Medium 5.5
Sssd: out-of-bounds read in the sssd
A flaw was found in the System Security Services Daemon (SSSD). The pam_passkey_child_read_data() function within the PAM passkey responder fails to properly handle raw bytes received from a pipe. Because the data is treated as a NUL-terminated C string witho…
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High 8.8
Sssd: sssd default kerberos configuration allows privilege escalation on ad-joined linux systems
A flaw was found in the integration of Active Directory and the System Security Services Daemon (SSSD) on Linux systems. In default configurations, the Kerberos local authentication plugin (sssd_krb5_localauth_plugin) is enabled, but a fallback to the an2ln p…
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High 7.1
Sssd: race condition during authorization leads to gpo policies functioning inconsistently
A race condition flaw was found in sssd where the GPO policy is not consistently applied for authenticated users. This may lead to improper authorization issues, granting or denying access to resources inappropriately.
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Unscored —
Network authentication attack via pam_krb5
pam_krb5 authenticates a user by essentially running kinit with the password, getting a ticket-granting ticket (tgt) from the Kerberos KDC (Key Distribution Center) over the network, as a way to verify the password. However, if a keytab is not provisioned on …
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High 8.8
sssd: libsss_certmap fails to sanitise certificate data used in LDAP filters
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Unscored —
sha256crypt and sha512crypt through 0.6 allow attackers to cause a denial of service (CPU consumption) because the algo…