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Kerberos Multiple Vulnerabilities

Secunia Advisory:

SA26676

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Release Date:

2007-09-05

Last Update:

2007-09-13

Popularity:

9,636 views

Critical:

Highly critical

Impact:

DoS
System access

Where:

From remote

Solution Status:

Vendor Workaround

Software:

Kerberos 5.x

Binary Analysis:

BA230 :: Available for 1 Credit

BA231 :: Available for 1 Credit

Secunia CVSS-2 Score:

Available in Secunia business solutions

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Advisory Content (Page 1 of 3)

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Description:
Some vulnerabilities have been reported in Kerberos, which can be exploited by malicious users and malicious people to compromise a vulnerable system.

1) A boundary error within the implementation of the RPCSEC_GSS authentication type exists in the "svcauth_gss_validate()" function in src/lib/rpc/svc_auth_gss.c. This can be exploited to cause a stack-based buffer overflow by sending a specially crafted RPC message to a vulnerable server.

Successful exploitation potentially allows the execution of arbitrary code. Products linking to the RPC library may also be affected.

2) The "kadm5_modify_policy_internal()" function in src/lib/kadm5/srv/svr_policy.c does not correctly check return values of the "krb5_db_get_policy()" function. This can be exploited to cause a memory corruption and may potentially allow the execution of arbitrary code.

Successful exploitation requires valid user credentials and privileges to modify policies.

Vulnerability #1 is reported in krb5-1.4 through krb5-1.6.2, vulnerability #2 is reported in krb5-1.5 through krb5-1.6.2.

Change Page:
[ 1 ] [ 2 ] [ 3 ]

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