Vulnerability Details : CVE-2014-4344
The acc_ctx_cont function in the SPNEGO acceptor in lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5) 1.5.x through 1.12.x before 1.12.2 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via an empty continuation token at a certain point during a SPNEGO negotiation.
Vulnerability category: Memory CorruptionDenial of service
Products affected by CVE-2014-4344
- cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_hpc_node:7.0:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.10:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.10.1:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.10.2:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.11.2:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.11.1:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.11:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.11.3:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.10.4:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.10.3:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.11.4:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.11.5:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.12:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.12.1:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2014-4344
9.11%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 92 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2014-4344
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.8
|
HIGH | AV:N/AC:L/Au:N/C:N/I:N/A:C |
10.0
|
6.9
|
NIST |
CWE ids for CVE-2014-4344
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The product dereferences a pointer that it expects to be valid but is NULL.Assigned by: nvd@nist.gov (Primary)
References for CVE-2014-4344
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http://secunia.com/advisories/61051
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http://advisories.mageia.org/MGASA-2014-0345.html
Mageia Advisory: MGASA-2014-0345 - Updated krb5 package fixes security vulnerabilities
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https://exchange.xforce.ibmcloud.com/vulnerabilities/95210
MIT Kerberos 5 SPNEGO acceptor denial of service CVE-2014-4344 Vulnerability Report
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https://github.com/krb5/krb5/commit/524688ce87a15fc75f87efc8c039ba4c7d5c197b
Fix null deref in SPNEGO acceptor [CVE-2014-4344] · krb5/krb5@524688c · GitHub
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http://secunia.com/advisories/60448
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http://www.securitytracker.com/id/1030706
MIT Kerberos Multiple Memory Errors Let Remote Users Deny Service - SecurityTracker
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http://www.debian.org/security/2014/dsa-3000
Debian -- Security Information -- DSA-3000-1 krb5Third Party Advisory
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http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136360.html
[SECURITY] Fedora 20 Update: krb5-1.11.5-10.fc20
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http://aix.software.ibm.com/aix/efixes/security/nas_advisory1.asc
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http://secunia.com/advisories/60082
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http://www.mandriva.com/security/advisories?name=MDVSA-2014:165
mandriva.com
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http://support.f5.com/kb/en-us/solutions/public/15000/500/sol15561.html
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http://www.osvdb.org/109389
404 Not Found
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https://bugzilla.redhat.com/show_bug.cgi?id=1121877
1121877 – (CVE-2014-4344) CVE-2014-4344 krb5: NULL pointer dereference flaw in SPNEGO acceptor for continuation tokens
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http://krbdev.mit.edu/rt/Ticket/Display.html?id=7970
#7970: NULL dereference in SPNEGO acceptor for continuation tokens [CVE-2014-4344]Issue Tracking;Third Party Advisory
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http://www.securityfocus.com/bid/69160
MIT Kerberos 5 CVE-2014-4344 NULL Pointer Dereference Remote Denial of Service Vulnerability
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http://rhn.redhat.com/errata/RHSA-2015-0439.html
RHSA-2015:0439 - Security Advisory - Red Hat Customer PortalThird Party Advisory
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http://secunia.com/advisories/59102
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https://github.com/krb5/krb5/commit/a7886f0ed1277c69142b14a2c6629175a6331edc
Fix null deref in SPNEGO acceptor [CVE-2014-4344] · krb5/krb5@a7886f0 · GitHubIssue Tracking;Patch;Third Party Advisory
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