Cryptsetup up to 2:1 Partition Unlock privileges management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Cryptsetup up to 2:1. Affected is an unknown function of the component Partition Unlock. Such manipulation leads to privileges management. No exploit is available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Cryptsetup up to 2:1. Affected by this issue is some unknown functionality of the component Partition Unlock. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability.

The weakness was published 11/11/2016 by Hector Marco as CVE-2016-4484: - Cryptsetup Initrd root Shell as confirmed talk (DeepSec). The advisory is shared for download at hmarco.org. The public release happened without coordination with the vendor. The attack may be launched remotely. A simple authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068. The advisory points out:

The fault is caused by an incorrect handling of the password check in the script file /scripts/local-top/cryptroot. When the user exceeds the maximum number of password tries (by default 3), then boot sequence continues normally.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at hmarco.org. A possible mitigation has been published 3 days after the disclosure of the vulnerability. The talk contains the following remark:

The issue can be easily fixed by stopping the boot sequence when the number of password guesses has been exhausted.

Similar entry is available at VDB-95834. Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.5

VulDB Base Score: 8.8
VulDB Temp Score: 8.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: hmarco.org

Timelineinfo

11/11/2016 🔍
11/14/2016 +3 days 🔍
11/16/2016 +2 days 🔍
06/01/2019 +927 days 🔍

Sourcesinfo

Advisory: CVE-2016-4484: - Cryptsetup Initrd root Shell
Researcher: Hector Marco
Status: Confirmed

GCVE (VulDB): GCVE-100-93620
See also: 🔍

Entryinfo

Created: 11/16/2016 08:09
Updated: 06/01/2019 21:21
Changes: 11/16/2016 08:09 (47), 11/16/2016 13:12 (1), 06/01/2019 21:21 (1)
Complete: 🔍
Committer: Simon
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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