SB2012080302 - Amazon Linux AMI update for krb5

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Main Vulnerability Database SB2012080302

SB2012080302 - Amazon Linux AMI update for krb5

Published: August 3, 2012 Updated: May 27, 2022

Security Bulletin ID SB2012080302
Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Input validation error (CVE-ID: CVE-2012-1013)

The vulnerability allows remote authenticated administrators to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (NULL pointer dereference and daemon crash) via a KRB5_KDB_DISALLOW_ALL_TIX create request that lacks a password.


2) Input validation error (CVE-ID: CVE-2012-1015)

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

The kdc_handle_protected_negotiation function in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.8.x, 1.9.x before 1.9.5, and 1.10.x before 1.10.3 attempts to calculate a checksum before verifying that the key type is appropriate for a checksum, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized pointer free, heap memory corruption, and daemon crash) via a crafted AS-REQ request.


Remediation

Install update from vendor's website.

References