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[ GLSA 200904-09 ] MIT Kerberos 5: Multiple vulnerabilities
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GLSA
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PostPosted: Fri Apr 10, 2009 12:26 pm    Post subject: [ GLSA 200904-09 ] MIT Kerberos 5: Multiple vulnerabilities Reply with quote

Gentoo Linux Security Advisory

Title: MIT Kerberos 5: Multiple vulnerabilities (GLSA 200904-09)
Severity: high
Exploitable: remote
Date: April 08, 2009
Bug(s): #262736, #263398
ID: 200904-09

Synopsis


Multiple vulnerabilities in MIT Kerberos 5 might allow remote
unauthenticated users to execute arbitrary code with root privileges.


Background


MIT Kerberos 5 is a suite of applications that implement the Kerberos
network protocol. kadmind is the MIT Kerberos 5 administration daemon,
KDC is the Key Distribution Center.


Affected Packages

Package: app-crypt/mit-krb5
Vulnerable: < 1.6.3-r6
Unaffected: >= 1.6.3-r6
Architectures: All supported architectures


Description


Multiple vulnerabilities have been reported in MIT Kerberos 5:
  • A free() call on an uninitialized pointer in the ASN.1 decoder
    when decoding an invalid encoding (CVE-2009-0846).
  • A buffer
    overread in the SPNEGO GSS-API application, reported by Apple Product
    Security (CVE-2009-0844).
  • A NULL pointer dereference in the
    SPNEGO GSS-API application, reported by Richard Evans
    (CVE-2009-0845).
  • An incorrect length check inside an ASN.1
    decoder leading to spurious malloc() failures (CVE-2009-0847).


Impact


A remote unauthenticated attacker could exploit the first vulnerability
to cause a Denial of Service or, in unlikely circumstances, execute
arbitrary code on the host running krb5kdc or kadmind with root
privileges and compromise the Kerberos key database. Exploitation of
the other vulnerabilities might lead to a Denial of Service in kadmind,
krb5kdc, or other daemons performing authorization against Kerberos
that utilize GSS-API or an information disclosure.


Workaround


There is no known workaround at this time.


Resolution


All MIT Kerberos 5 users should upgrade to the latest version:
Code:
# emerge --sync
    # emerge --ask --oneshot --verbose ">=app-crypt/mit-krb5-1.6.3-r6"


References

CVE-2009-0844
CVE-2009-0845
CVE-2009-0846
CVE-2009-0847


Last edited by GLSA on Fri Jun 22, 2012 4:27 am; edited 1 time in total
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