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CVE-2017-11368

krb5: Invalid S4U2Self or S4U2Proxy request causes assertion failure

In MIT Kerberos 5 (aka krb5) 1.7 and later, an authenticated attacker can cause a KDC assertion failure by sending invalid S4U2Self or S4U2Proxy requests.

CVSS 3.0 · 6.5 Medium EPSS 2.4% KEV · Not listed
Vendors
Fedoraproject Mit Redhat
Products
Fedora Kerberos Kerberos 5 and 1 more
CVE-2017-11462

krb5: Automatic sec context deletion could lead to double-free

Double free vulnerability in MIT Kerberos 5 (aka krb5) allows attackers to have unspecified impact via vectors involving automatic deletion of security contexts on error.

CVSS 3.0 · 9.8 Critical EPSS 5.5% KEV · Not listed
Vendors
Fedoraproject Mit
Products
Fedora Kerberos 5
CVE-2017-15088

krb5: Buffer overflow in get_matching_data()

plugins/preauth/pkinit/pkinit_crypto_openssl.c in MIT Kerberos 5 (aka krb5) through 1.15.2 mishandles Distinguished Name (DN) fields, which allows remote attackers to execute arbitrary code or cause a denial of service (buffer overflow and application crash) in situations involving untrusted X.509 data, related to the get_matching_data and X509_NAME_oneline_ex functions. NOTE: this has security relevance only in use cases outside of the MIT Kerberos distribution, e.g., the use of get_matching_data in KDC certauth plugin code that is specific to Red Hat.

CVSS 3.1 · 9.8 Critical EPSS 8.6% KEV · Not listed
Vendors
Mit
Products
Kerberos 5
CVE-2014-9423

krb5: libgssrpc server applications leak uninitialized bytes (MITKRB5-SA-2015-001)

The svcauth_gss_accept_sec_context function in lib/rpc/svc_auth_gss.c in MIT Kerberos 5 (aka krb5) 1.11.x through 1.11.5, 1.12.x through 1.12.2, and 1.13.x before 1.13.1 transmits uninitialized interposer data to clients, which allows remote attackers to obtain sensitive information from process heap memory by sniffing the network for data in a handle field.

CVSS 2.0 · 5.0 Medium EPSS 3.9% KEV · Not listed
Vendors
Mit Redhat
Products
Kerberos 5 Enterprise Linux
CVE-2014-4341

krb5: denial of service flaws when handling padding length longer than the plaintext

MIT Kerberos 5 (aka krb5) before 1.12.2 allows remote attackers to cause a denial of service (buffer over-read and application crash) by injecting invalid tokens into a GSSAPI application session.

CVSS 2.0 · 5.0 Medium EPSS 7.1% KEV · Not listed
Vendors
Debian Fedoraproject Mit and 1 more
Products
Debian Linux Fedora Kerberos 5 and 8 more
CVE-2014-4342

krb5: denial of service flaws when handling RFC 1964 tokens

MIT Kerberos 5 (aka krb5) 1.7.x through 1.12.x before 1.12.2 allows remote attackers to cause a denial of service (buffer over-read or NULL pointer dereference, and application crash) by injecting invalid tokens into a GSSAPI application session.

CVSS 2.0 · 5.0 Medium EPSS 6.5% KEV · Not listed
Vendors
Debian Mit Redhat
Products
Debian Linux Kerberos Kerberos 5 and 5 more
CVE-2014-4343

krb5: double-free flaw in SPNEGO initiators

Double free vulnerability in the init_ctx_reselect function in the SPNEGO initiator in lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5) 1.10.x through 1.12.x before 1.12.2 allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via network traffic that appears to come from an intended acceptor, but specifies a security mechanism different from the one proposed by the initiator.

CVSS 2.0 · 7.6 High EPSS 6.4% KEV · Not listed
Vendors
Debian Mit Redhat
Products
Debian Linux Kerberos 5 Enterprise Linux and 4 more
CVE-2014-4344

krb5: NULL pointer dereference flaw in SPNEGO acceptor for continuation tokens

The acc_ctx_cont function in the SPNEGO acceptor in lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5) 1.5.x through 1.12.x before 1.12.2 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via an empty continuation token at a certain point during a SPNEGO negotiation.

CVSS 2.0 · 7.8 High EPSS 6.6% KEV · Not listed
Vendors
Debian Mit Redhat
Products
Debian Linux Kerberos 5 Enterprise Linux and 4 more
CVE-2014-4345

krb5: buffer overrun in kadmind with LDAP backend (MITKRB5-SA-2014-001)

Off-by-one error in the krb5_encode_krbsecretkey function in plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c in the LDAP KDB module in kadmind in MIT Kerberos 5 (aka krb5) 1.6.x through 1.11.x before 1.11.6 and 1.12.x before 1.12.2 allows remote authenticated users to cause a denial of service (buffer overflow) or possibly execute arbitrary code via a series of "cpw -keepold" commands.

CVSS 2.0 · 8.5 High EPSS 8.1% KEV · Not listed
Vendors
Mit Redhat
Products
Kerberos 5 Enterprise Linux
CVE-2014-5351

krb5: current keys returned when randomizing the keys for a service principal

The kadm5_randkey_principal_3 function in lib/kadm5/srv/svr_principal.c in kadmind in MIT Kerberos 5 (aka krb5) before 1.13 sends old keys in a response to a -randkey -keepold request, which allows remote authenticated users to forge tickets by leveraging administrative access.

CVSS 2.0 · 2.1 Low EPSS 2.6% KEV · Not listed
Vendors
Mit
Products
Kerberos 5
CVE-2014-5352

krb5: gss_process_context_token() incorrectly frees context (MITKRB5-SA-2015-001)

The krb5_gss_process_context_token function in lib/gssapi/krb5/process_context_token.c in the libgssapi_krb5 library in MIT Kerberos 5 (aka krb5) through 1.11.5, 1.12.x through 1.12.2, and 1.13.x before 1.13.1 does not properly maintain security-context handles, which allows remote authenticated users to cause a denial of service (use-after-free and double free, and daemon crash) or possibly execute arbitrary code via crafted GSSAPI traffic, as demonstrated by traffic to kadmind.

CVSS 2.0 · 9.0 Critical EPSS 6.2% KEV · Not listed
Vendors
Mit Redhat
Products
Kerberos 5 Enterprise Linux
CVE-2014-5353

krb5: NULL pointer dereference when using a ticket policy name as a password policy name

The krb5_ldap_get_password_policy_from_dn function in plugins/kdb/ldap/libkdb_ldap/ldap_pwd_policy.c in MIT Kerberos 5 (aka krb5) before 1.13.1, when the KDC uses LDAP, allows remote authenticated users to cause a denial of service (daemon crash) via a successful LDAP query with no results, as demonstrated by using an incorrect object type for a password policy.

CVSS 2.0 · 3.5 Low EPSS 5.0% KEV · Not listed
Vendors
Canonical Debian Fedoraproject and 4 more
Products
Ubuntu Linux Debian Linux Fedora and 10 more
CVE-2014-5354

krb5: NULL pointer dereference when using keyless entries

plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.1, when the KDC uses LDAP, allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) by creating a database entry for a keyless principal, as demonstrated by a kadmin "add_principal -nokey" or "purgekeys -all" command.

CVSS 2.0 · 3.5 Low EPSS 1.7% KEV · Not listed
Vendors
Mit
Products
Kerberos Kerberos 5
CVE-2014-5355

krb5: unauthenticated denial of service in recvauth_common() and others

MIT Kerberos 5 (aka krb5) through 1.13.1 incorrectly expects that a krb5_read_message data field is represented as a string ending with a '\0' character, which allows remote attackers to (1) cause a denial of service (NULL pointer dereference) via a zero-byte version string or (2) cause a denial of service (out-of-bounds read) by omitting the '\0' character, related to appl/user_user/server.c and lib/krb5/krb/recvauth.c.

CVSS 2.0 · 5.0 Medium EPSS 4.6% KEV · Not listed
Vendors
Mit Redhat
Products
Kerberos 5 Enterprise Linux
CVE-2014-9421

krb5: kadmind doubly frees partial deserialization results (MITKRB5-SA-2015-001)

The auth_gssapi_unwrap_data function in lib/rpc/auth_gssapi_misc.c in MIT Kerberos 5 (aka krb5) through 1.11.5, 1.12.x through 1.12.2, and 1.13.x before 1.13.1 does not properly handle partial XDR deserialization, which allows remote authenticated users to cause a denial of service (use-after-free and double free, and daemon crash) or possibly execute arbitrary code via malformed XDR data, as demonstrated by data sent to kadmind.

CVSS 2.0 · 9.0 Critical EPSS 6.2% KEV · Not listed
Vendors
Mit Redhat
Products
Kerberos 5 Enterprise Linux
CVE-2014-9422

krb5: kadmind incorrectly validates server principal name (MITKRB5-SA-2015-001)

The check_rpcsec_auth function in kadmin/server/kadm_rpc_svc.c in kadmind in MIT Kerberos 5 (aka krb5) through 1.11.5, 1.12.x through 1.12.2, and 1.13.x before 1.13.1 allows remote authenticated users to bypass a kadmin/* authorization check and obtain administrative access by leveraging access to a two-component principal with an initial "kadmind" substring, as demonstrated by a "ka/x" principal.

CVSS 2.0 · 6.1 Medium EPSS 2.7% KEV · Not listed
Vendors
Mit Redhat
Products
Kerberos 5 Enterprise Linux
CVE-2015-2694

krb5: issues in OTP and PKINIT kdcpreauth modules leading to requires_preauth bypass

The kdcpreauth modules in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.2 do not properly track whether a client's request has been validated, which allows remote attackers to bypass an intended preauthentication requirement by providing (1) zero bytes of data or (2) an arbitrary realm name, related to plugins/preauth/otp/main.c and plugins/preauth/pkinit/pkinit_srv.c.

CVSS 2.0 · 5.8 Medium EPSS 2.8% KEV · Not listed
Vendors
Mit Redhat
Products
Kerberos 5 Enterprise Linux
CVE-2015-2695

krb5: SPNEGO context aliasing bugs

lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5) before 1.14 relies on an inappropriate context handle, which allows remote attackers to cause a denial of service (incorrect pointer read and process crash) via a crafted SPNEGO packet that is mishandled during a gss_inquire_context call.

CVSS 2.0 · 5.0 Medium EPSS 6.0% KEV · Not listed
Vendors
Canonical Debian Mit and 3 more
Products
Ubuntu Linux Debian Linux Kerberos 5 and 6 more
CVE-2015-2696

krb5: IAKERB context aliasing flaw

lib/gssapi/krb5/iakerb.c in MIT Kerberos 5 (aka krb5) before 1.14 relies on an inappropriate context handle, which allows remote attackers to cause a denial of service (incorrect pointer read and process crash) via a crafted IAKERB packet that is mishandled during a gss_inquire_context call.

CVSS 2.0 · 7.1 High EPSS 4.5% KEV · Not listed
Vendors
Canonical Debian Mit and 2 more
Products
Ubuntu Linux Debian Linux Kerberos 5 and 5 more
CVE-2015-2697

krb5: build_principal() memory flaw

The build_principal_va function in lib/krb5/krb/bld_princ.c in MIT Kerberos 5 (aka krb5) before 1.14 allows remote authenticated users to cause a denial of service (out-of-bounds read and KDC crash) via an initial '\0' character in a long realm field within a TGS request.

CVSS 2.0 · 4.0 Medium EPSS 4.0% KEV · Not listed
Vendors
Canonical Debian Mit and 3 more
Products
Ubuntu Linux Debian Linux Kerberos 5 and 6 more