Summary
Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2026-14476: 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 cache directory as root. On default RHEL configurations with SELinux enforcing, this can be used to inject Kerberos configuration leading to authentication bypass. CVE-2026-14474: 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 sudoRole object granting root-level sudo privileges on all SSSD-enrolled hosts. CVE-2026-12610: 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 contents, leading to a denial of service that disrupts authentication. This vulnerability also presents a potential for privilege escalation, although it is difficult to exploit.
Fixed packages 35
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2 | libipa_hbac | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | libipa_hbac-devel | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | libsss_autofs | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | libsss_certmap | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | libsss_certmap-devel | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | libsss_idmap | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | libsss_idmap-devel | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | libsss_nss_idmap | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | libsss_nss_idmap-devel | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | libsss_simpleifp | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | libsss_simpleifp-devel | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | libsss_sudo | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | python-libipa_hbac | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | python-libsss_nss_idmap | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | python-sss | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | python-sss-murmur | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | python-sssdconfig | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | sssd | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | sssd-ad | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | sssd-client | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | sssd-common | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | sssd-common-pac | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | sssd-dbus | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | sssd-debuginfo | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | sssd-ipa | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | sssd-kcm | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | sssd-krb5 | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | sssd-krb5-common | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | sssd-ldap | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | sssd-libwbclient | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | sssd-libwbclient-devel | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | sssd-polkit-rules | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | sssd-proxy | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | sssd-tools | 0:1.16.5-12.amzn2.15 |
| Amazon Linux · 2 | sssd-winbind-idmap | 0:1.16.5-12.amzn2.15 |
Vulnerabilities 3
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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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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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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 …