MIT Kerberos 5 double free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.4$0-$5k0.00

Summaryinfo

A vulnerability was found in MIT Kerberos 5. It has been declared as critical. This vulnerability affects unknown code. The manipulation results in double free. This vulnerability is known as CVE-2017-11462. It is possible to launch the attack remotely. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as very critical has been found in MIT Kerberos 5 (Network Authentication Software) (version now known). Affected is some unknown processing. The manipulation with an unknown input leads to a double free vulnerability. CWE is classifying the issue as CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The bug was discovered 09/06/2017. The weakness was published 09/13/2017 (Website). The advisory is shared for download at lists.fedoraproject.org. This vulnerability is traded as CVE-2017-11462 since 07/19/2017. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 12/28/2022).

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 103098 (Fedora 26 : krb5 (2017-10c74147f9)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 170448 (OpenSUSE Security Update for krb5 (openSUSE-SU-2017:2712-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (103098). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.6
VulDB Meta Temp Score: 9.4

VulDB Base Score: 9.4
VulDB Temp Score: 9.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Double free
CWE: CWE-415 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 103098
Nessus Name: Fedora 26 : krb5 (2017-10c74147f9)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for krb5 FEDORA-2017-56e23bc2b5
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

07/19/2017 🔍
09/06/2017 +49 days 🔍
09/09/2017 +3 days 🔍
09/11/2017 +2 days 🔍
09/13/2017 +2 days 🔍
09/13/2017 +0 days 🔍
09/14/2017 +1 days 🔍
12/28/2022 +1931 days 🔍

Sourcesinfo

Vendor: mit.edu

Advisory: FEDORA-2017-10c74147f9
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-11462 (🔍)
GCVE (CVE): GCVE-0-2017-11462
GCVE (VulDB): GCVE-100-106560

Entryinfo

Created: 09/14/2017 08:58
Updated: 12/28/2022 14:32
Changes: 09/14/2017 08:58 (64), 11/15/2019 19:52 (9), 12/28/2022 14:27 (5), 12/28/2022 14:31 (1), 12/28/2022 14:32 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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