Vulnerability Monitor

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CVE-2017-11462

Double free vulnerability in MIT Kerberos 5 (aka krb5) allows attackers to have unspecified impact via vectors involving automatic deletion of security contexts on error.

Security Impact Summary

This vulnerability carries a CRITICAL severity rating with a CVSS v3.1 score of 9.8, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 2 products from mit, from fedoraproject organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2017, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2017-09-13T16:29:00.430

Last Modified

2026-05-13T00:24:29.033

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 9.8 (CRITICAL)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

6.4

Weaknesses

Type: Primary
CWE-415

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	mit	kerberos_5	1.14	Yes
Application	mit	kerberos_5	1.14	Yes
Application	mit	kerberos_5	1.14	Yes
Application	mit	kerberos_5	1.14	Yes
Application	mit	kerberos_5	1.14.1	Yes
Application	mit	kerberos_5	1.14.2	Yes
Application	mit	kerberos_5	1.14.3	Yes
Application	mit	kerberos_5	1.14.4	Yes
Application	mit	kerberos_5	1.14.5	Yes
Application	mit	kerberos_5	1.15	Yes
Application	mit	kerberos_5	1.15.1	Yes
Application	mit	kerberos_5	1.15.1	Yes
Application	mit	kerberos_5	1.15.1	Yes
Operating System	fedoraproject	fedora	25	Yes
Operating System	fedoraproject	fedora	26	Yes

References

http://krbdev.mit.edu/rt/Ticket/Display.html?id=8598 Vendor Advisory ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=1488873 Issue Tracking, Patch, Third Party Advisory, VDB Entry ([email protected])
https://github.com/krb5/krb5/commit/56f7b1bc95a2a3eeb420e069e7655fb181ade5cf Patch, Third Party Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2FPRUP4YVOEBGEROUYWZFEQ64HTMGNED/ ([email protected])
http://krbdev.mit.edu/rt/Ticket/Display.html?id=8598 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=1488873 Issue Tracking, Patch, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/krb5/krb5/commit/56f7b1bc95a2a3eeb420e069e7655fb181ade5cf Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2FPRUP4YVOEBGEROUYWZFEQ64HTMGNED/ (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For mit's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.