zsh up to 5.0.6 Variable 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 classified as critical has been found in zsh up to 5.0.6. The affected element is an unknown function. Performing a manipulation as part of Variable results in access control. This vulnerability is cataloged as CVE-2014-10070. The attack must be initiated from a local position. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in zsh up to 5.0.6. This affects some unknown processing. The manipulation as part of a Variable leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

zsh before 5.0.7 allows evaluation of the initial values of integer variables imported from the environment (instead of treating them as literal numbers). That could allow local privilege escalation, under some specific and atypical conditions where zsh is being invoked in privilege-elevation contexts when the environment has not been properly sanitized, such as when zsh is invoked by sudo on systems where "env_reset" has been disabled.

The bug was discovered 01/20/2014. The weakness was shared 02/27/2018 (Website). The advisory is shared at zsh.sourceforge.net. This vulnerability is uniquely identified as CVE-2014-10070 since 02/27/2018. The exploitability is told to be easy. An attack has to be approached locally. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 1499 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 109488 (EulerOS 2.0 SP1 : zsh (EulerOS-SA-2018-1090)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Huawei Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171104 (OpenSUSE Security Update for zsh (openSUSE-SU-2018:1093-1)).

Upgrading to version 5.0.7 eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (109488). The entry VDB-113890 is related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
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: Access control
CWE: CWE-264
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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Nessus ID: 109488
Nessus Name: EulerOS 2.0 SP1 : zsh (EulerOS-SA-2018-1090)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 63585
OpenVAS Name: Debian LTS Advisory ([SECURITY] [DLA 1304-1] zsh security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: zsh 5.0.7
Patch: sourceforge.net

Timelineinfo

01/20/2014 🔍
02/27/2018 +1499 days 🔍
02/27/2018 +0 days 🔍
02/27/2018 +0 days 🔍
02/28/2018 +1 days 🔍
03/28/2018 +28 days 🔍
05/02/2018 +35 days 🔍
02/10/2023 +1745 days 🔍

Sourcesinfo

Advisory: 546203a7
Status: Not defined

CVE: CVE-2014-10070 (🔍)
GCVE (CVE): GCVE-0-2014-10070
GCVE (VulDB): GCVE-100-113889
See also: 🔍

Entryinfo

Created: 02/28/2018 08:09
Updated: 02/10/2023 15:59
Changes: 02/28/2018 08:09 (73), 01/09/2020 08:36 (2), 02/10/2023 15:54 (5), 02/10/2023 15:59 (1)
Complete: 🔍
Cache ID: 216::103

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

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