CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.4	$0-$5k	0.00

A vulnerability was found in zsh up to 5.5 and classified as critical. This issue affects an unknown functionality of the component Script File Handler. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in zsh before 5.6. The beginning of a #! script file was mishandled, potentially leading to an execve call to a program named on the second line.

The bug was discovered 09/05/2018. The weakness was presented 09/05/2018 with Red Hat (Website). The advisory is shared at bugs.debian.org. The identification of this vulnerability is CVE-2018-0502 since 11/26/2017. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 117525 (openSUSE Security Update : zsh (openSUSE-2018-1018)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171576 (OpenSUSE Security Update for zsh (openSUSE-SU-2018:2741-1)).

Upgrading to version 5.6 eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (117525). See 113890, 113891, 113902 and 113903 for similar entries.

Productinfo

Name

• zsh

Version

• 5.0
• 5.1
• 5.2
• 5.3
• 5.4
• 5.5

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 117525
Nessus Name: openSUSE Security Update : zsh (openSUSE-2018-1018)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

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 5.6
Patch: sourceforge.net

Timelineinfo

11/26/2017 🔍
03/09/2018 +102 days 🔍
09/05/2018 +179 days 🔍
09/05/2018 +0 days 🔍
09/05/2018 +0 days 🔍
09/05/2018 +0 days 🔍
09/17/2018 +12 days 🔍
09/17/2018 +0 days 🔍
05/07/2023 +1693 days 🔍

Sourcesinfo

Advisory: USN-3764-1
Organization: Red Hat
Status: Confirmed

CVE: CVE-2018-0502 (🔍)
SecurityFocus: 103359 - Zsh 'exec.c:hashcmd()' Function Local Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 09/05/2018 14:37
Updated: 05/07/2023 09:00
Changes: 09/05/2018 14:37 (73), 03/20/2020 16:40 (5), 05/07/2023 09:00 (5)
Complete: 🔍

Discussion

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