Linux Kernel keyring_detect_cycle_iterator cryptographic issue

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5.4	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Linux Kernel and classified as problematic. This impacts the function keyring_detect_cycle_iterator. This manipulation causes cryptographic issue. This vulnerability is registered as CVE-2014-0102. No exploit is available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability has been found in Linux Kernel (Operating System) (the affected version unknown) and classified as problematic. Affected by this vulnerability is the function keyring_detect_cycle_iterator. The manipulation with an unknown input leads to a cryptographic issue vulnerability. The CWE definition for the vulnerability is CWE-310. As an impact it is known to affect availability. The summary by CVE is:

The keyring_detect_cycle_iterator function in security/keys/keyring.c in the Linux kernel through 3.13.6 does not properly determine whether keyrings are identical, which allows local users to cause a denial of service (OOPS) via crafted keyctl commands.

The weakness was published 03/04/2014 by Tommi Rantala as 1072419 as confirmed bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is known as CVE-2014-0102 since 12/03/2013. The exploitation appears to be easy. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1600 for this issue. The advisory points out:

The problem is that search_nested_keyrings() sees two keyrings that have matching type and description, so keyring_compare_object() returns true. s_n_k() then passes the key to the iterator function - keyring_detect_cycle_iterator() - which *should* check to see whether this is the keyring of interest, not just one with the same name and, leads to BUG_ON.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 123449 (Fedora Security Update for kernel (FEDORA-2015-3594)).

Applying the patch KEYS: Expand the capacity of a keyring is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (91562), SecurityFocus (BID 65961†) and Vulnerability Center (SBV-43923†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

License

open-source

Website

Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 5.4

VulDB Base Score: 6.2
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Cryptographic issue
CWE: CWE-310
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
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OpenVAS ID: 867583
OpenVAS Name: Fedora Update for kernel FEDORA-2014-3442
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: KEYS: Expand the capacity of a keyring

Timelineinfo

09/24/2013 🔍
12/03/2013 +69 days 🔍
03/04/2014 +91 days 🔍
03/04/2014 +0 days 🔍
03/10/2014 +6 days 🔍
03/11/2014 +1 days 🔍
03/11/2014 +0 days 🔍
04/07/2014 +27 days 🔍
11/30/2024 +3890 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 1072419
Researcher: Tommi Rantala
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-0102 (🔍)
GCVE (CVE): GCVE-0-2014-0102
GCVE (VulDB): GCVE-100-12505
X-Force: 91562 - Linux Kernel keyring_detect_cycle_iterator() denial of service, Medium Risk
SecurityFocus: 65961 - Linux Kernel 'keyring_detect_cycle_iterator()' Function Local Denial of Service Vulnerability
Vulnerability Center: 43923 - Linux Kernel before 3.13.6 Local DoS via Crafted Key Commands, Medium

Entryinfo

Created: 03/10/2014 09:14
Updated: 11/30/2024 13:56
Changes: 03/10/2014 09:14 (70), 05/24/2017 11:31 (3), 11/30/2024 13:56 (18)
Complete: 🔍
Cache ID: 216:FD2:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.