VDB-112712 · CVE-2014-3519 · BID 68171

Linux Kernel 2.6.32 vzkernel open_by_handle_at access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Linux Kernel 2.6.32. The affected element is the function open_by_handle_at of the component vzkernel. Such manipulation leads to access control. This vulnerability is uniquely identified as CVE-2014-3519. Local access is required to approach this attack. No exploit exists.

Detailsinfo

A vulnerability was found in Linux Kernel 2.6.32 (Operating System) and classified as critical. Affected by this issue is the function open_by_handle_at of the component vzkernel. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The open_by_handle_at function in vzkernel before 042stab090.5 in the OpenVZ modification for the Linux kernel 2.6.32, when using simfs, might allow local container users with CAP_DAC_READ_SEARCH capability to bypass an intended container protection mechanism and access arbitrary files on a filesystem via vectors related to use of the file_handle structure.

The bug was discovered 06/24/2014. The weakness was disclosed 02/01/2018 by Michal Grzedzicki (oss-sec). The advisory is shared for download at openwall.com. This vulnerability is handled as CVE-2014-3519 since 05/14/2014. The attack needs to be approached locally. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 12/31/2019). The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability was handled as a non-public zero-day exploit for at least 1318 days. During that time the estimated underground price was around $5k-$25k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 68171†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
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: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/14/2014 🔍
06/24/2014 +41 days 🔍
06/24/2014 +0 days 🔍
02/01/2018 +1318 days 🔍
02/01/2018 +0 days 🔍
02/02/2018 +1 days 🔍
12/31/2019 +697 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: openwall.com
Researcher: Michal Grzedzicki
Status: Not defined
Confirmation: 🔍

CVE: CVE-2014-3519 (🔍)
GCVE (CVE): GCVE-0-2014-3519
GCVE (VulDB): GCVE-100-112712
SecurityFocus: 68171 - OpenVZ 'open_by_handle_at()' Function Local Security Bypass Vulnerability

Entryinfo

Created: 02/02/2018 07:56
Updated: 12/31/2019 19:52
Changes: 02/02/2018 07:56 (64), 12/31/2019 19:52 (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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