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CVE-2015-8629

Status Candidate

Overview

The xdr_nullstring function in lib/kadm5/kadm_rpc_xdr.c in kadmind in MIT Kerberos 5 (aka krb5) before 1.13.4 and 1.14.x before 1.14.1 does not verify whether '�' characters exist as expected, which allows remote authenticated users to obtain sensitive information or cause a denial of service (out-of-bounds read) via a crafted string.

Related Files

Red Hat Security Advisory 2016-0532-01
Posted Apr 4, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-0532-01 - Kerberos is a network authentication system, which can improve the security of your network by eliminating the insecure practice of sending passwords over the network in unencrypted form. It allows clients and servers to authenticate to each other with the help of a trusted third party, the Kerberos key distribution center. Security Fix: A memory leak flaw was found in the krb5_unparse_name() function of the MIT Kerberos kadmind service. An authenticated attacker could repeatedly send specially crafted requests to the server, which could cause the server to consume large amounts of memory resources, ultimately leading to a denial of service due to memory exhaustion.

tags | advisory, denial of service, memory leak
systems | linux, redhat
advisories | CVE-2015-8629, CVE-2015-8630, CVE-2015-8631
MD5 | 0ae51d5c9c936555cf7c84c0e86f2c08
Red Hat Security Advisory 2016-0493-01
Posted Mar 23, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-0493-01 - Kerberos is a networked authentication system which allows clients and servers to authenticate to each other with the help of a trusted third party, the Kerberos KDC. A memory leak flaw was found in the krb5_unparse_name() function of the MIT Kerberos kadmind service. An authenticated attacker could repeatedly send specially crafted requests to the server, which could cause the server to consume large amounts of memory resources, ultimately leading to a denial of service due to memory exhaustion. An out-of-bounds read flaw was found in the kadmind service of MIT Kerberos. An authenticated attacker could send a maliciously crafted message to force kadmind to read beyond the end of allocated memory, and write the memory contents to the KDC database if the attacker has write permission, leading to information disclosure.

tags | advisory, denial of service, memory leak, info disclosure
systems | linux, redhat
advisories | CVE-2015-8629, CVE-2015-8631
MD5 | e4261d9f81ee76091561ddb8a0d340ad
Debian Security Advisory 3466-1
Posted Feb 5, 2016
Authored by Debian | Site debian.org

Debian Linux Security Advisory 3466-1 - Several vulnerabilities were discovered in krb5, the MIT implementation of Kerberos.

tags | advisory, vulnerability
systems | linux, debian
advisories | CVE-2015-8629, CVE-2015-8630, CVE-2015-8631
MD5 | ba861ba2d6603aac43ff3639b80aaa3a
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