CVE-2014-4343 - Double Free

Severity

76%

Complexity

49%

Confidentiality

165%

CWE-415: Double Free

Double free vulnerability in the init_ctx_reselect function in the SPNEGO initiator in lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5) 1.10.x through 1.12.x before 1.12.2 allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via network traffic that appears to come from an intended acceptor, but specifies a security mechanism different from the one proposed by the initiator.

CWE-415: Double Free

CVSS 2.0 Base Score 7.6. CVSS Attack Vector: network. CVSS Attack Complexity: high. CVSS Vector: (AV:N/AC:H/Au:N/C:C/I:C/A:C).

Demo Examples

Double Free

CWE-415

Double Free

CWE-415

While contrived, this code should be exploitable on Linux distributions which do not ship with heap-chunk check summing turned on.


               
}
free(buf1R2);

Overview

First reported 10 years ago

2014-08-14 05:01:00

Last updated 5 years ago

2020-01-21 15:46:00

Affected Software

Debian Linux 7.0

7.0

Mit Kerberos 5 1.10

1.10

Mit Kerberos 5 1.10.1

1.10.1

Mit Kerberos 5 1.10.2

1.10.2

Mit Kerberos 5 1.10.3

1.10.3

Mit Kerberos 5 1.10.4

1.10.4

Mit Kerberos 5 1.11

1.11

Mit Kerberos 5 1.11.1

1.11.1

Mit Kerberos 5 1.11.2

1.11.2

Mit Kerberos 5 1.11.3

1.11.3

Mit Kerberos 5 1.11.4

1.11.4

Mit Kerberos 5 1.11.5

1.11.5

Mit Kerberos 5 1.12

1.12

Mit Kerberos 5 1.12.1

1.12.1

RedHat Enterprise Linux Desktop 7.0

7.0

RedHat Enterprise Linux HPC Node 7.0

7.0

RedHat Enterprise Linux Server 7.0

7.0

RedHat Enterprise Linux Workstation 7.0

7.0

References

http://advisories.mageia.org/MGASA-2014-0345.html

http://aix.software.ibm.com/aix/efixes/security/nas_advisory1.asc

http://krbdev.mit.edu/rt/Ticket/Display.html?id=7969

Issue Tracking, Third Party Advisory

FEDORA-2014-8189

RHSA-2015:0439

Third Party Advisory

59102

60082

60448

61052

GLSA-201412-53

Third Party Advisory

http://support.f5.com/kb/en-us/solutions/public/15000/500/sol15553.html

DSA-3000

Third Party Advisory

109390

69159

1030706

https://bugzilla.redhat.com/show_bug.cgi?id=1121876

kerberos-cve20144343-dos(95211)

https://github.com/krb5/krb5/commit/f18ddf5d82de0ab7591a36e465bc24225776940f

Issue Tracking, Patch, Third Party Advisory

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