Updated heimdal packages fix security vulnerability

Michael Eder and Thomas Kittel discovered that Heimdal did not correctly handle ASN.1 data. This would allow an unauthenticated remote attacker to cause a denial of service crash of the KDC daemon by sending maliciously crafted packets CVE-2017-17439...

CVE-2017-17439

In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to th...

CVE-2017-17439

In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to th...

CVE-2017-17439

In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to th...

CVE-2017-17439

In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to th...

Null pointer dereference

In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to th...

DEBIAN-CVE-2017-17439

In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to th...

ALPINE-CVE-2017-17439

In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to th...

CVE-2017-17439

In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to th...

CVE-2017-17439

In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to th...

CVE-2017-17439

In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to th...

CVE-2017-17439

CVE-2017-17439 affects Heimdal (libheimdal) up to version 7.4, where a vulnerability in the ASN.1/DER handling can be triggered by a crafted UDP packet with empty client name or realm data. The issue causes the KDC to dereference NULL pointers in kdc/kerberos5.c and der_length.c, leading to a seg...

OpenJDK: use of unprotected sname in Kerberos client (Libraries, 8178794)

It was discovered that the Kerberos client implementation in the Libraries component of OpenJDK used the sname field from the plain text part rather than encrypted part of the KDC reply message. A man-in-the-middle attacker could possibly use this flaw to impersonate Kerberos services to Java...

OpenJDK: use of unprotected sname in Kerberos client (Libraries, 8178794)

It was discovered that the Kerberos client implementation in the Libraries component of OpenJDK used the sname field from the plain text part rather than encrypted part of the KDC reply message. A man-in-the-middle attacker could possibly use this flaw to impersonate Kerberos services to Java...

OpenJDK: use of unprotected sname in Kerberos client (Libraries, 8178794)

It was discovered that the Kerberos client implementation in the Libraries component of OpenJDK used the sname field from the plain text part rather than encrypted part of the KDC reply message. A man-in-the-middle attacker could possibly use this flaw to impersonate Kerberos services to Java...

Buffer overflow

plugins/preauth/pkinit/pkinitcryptoopenssl.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,...

CVE-2017-15088

plugins/preauth/pkinit/pkinitcryptoopenssl.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,...

CVE-2017-15088

plugins/preauth/pkinit/pkinitcryptoopenssl.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,...

CVE-2017-15088

plugins/preauth/pkinit/pkinitcryptoopenssl.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,...

Updated krb5 packages fix security vulnerabilities

An authentication bypass flaw was found in the way krb5's certauth interface handled the validation of client certificates. A remote attacker able to communicate with the KDC could potentially use this flaw to impersonate arbitrary principals under rare and erroneous circumstances CVE-2017-7562...