Scientific Linux: SLSA-2016:0532-1 Moderate: krb5 Memory Leak and DoS

Date: Mon, 4 Apr 2016 13:57:03 -0000
Reply-To: scientific-linux-users@
Sender: Security Errata for Scientific Linux
 
From: Pat Riehecky 
Subject: Security ERRATA Moderate: krb5 on SL7.x x86_64
MIME-Version: 1.0
Message-ID: <20160404135703.19291.66727@slpackages.fnal.gov>

Synopsis: Moderate: krb5 security update
Advisory ID: SLSA-2016:0532-1
Issue Date: 2016-04-04
CVE Numbers: CVE-2015-8629
 CVE-2015-8631
 CVE-2015-8630
--

Security Fix(es):

* 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. (CVE-2015-8631)

* 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. (CVE-2015-8629)

* A NULL pointer dereference flaw was found in the procedure used by the
MIT Kerberos kadmind service to store policies: the
kadm5_create_principal_3() and kadm5_modify_principal() function did not
ensure that a policy was given when KADM5_POLICY was set. An authenticated
attacker with permissions to modify the database could use this flaw to
add or modify a principal with a policy set to NULL, causing the kadmind
service to crash. (CVE-2015-8630)
--

SL7
 x86_64
 krb5-debuginfo-1.13.2-12.el7_2.i686.rpm
 krb5-debuginfo-1.13.2-12.el7_2.x86_64.rpm
 krb5-libs-1.13.2-12.el7_2.i686.rpm
 krb5-libs-1.13.2-12.el7_2.x86_64.rpm
 krb5-pkinit-1.13.2-12.el7_2.x86_64.rpm
 krb5-workstation-1.13.2-12.el7_2.x86_64.rpm
 krb5-devel-1.13.2-12.el7_2.i686.rpm
 krb5-devel-1.13.2-12.el7_2.x86_64.rpm
 krb5-server-1.13.2-12.el7_2.x86_64.rpm
 krb5-server-ldap-1.13.2-12.el7_2.x86_64.rpm

- Scientific Linux Development Team