zsh up to 5.5 Shebang Line input validation

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in zsh up to 5.5. This impacts an unknown function of the component Shebang Line Handler. The manipulation results in input validation. This vulnerability is cataloged as CVE-2018-13259. The attack may be launched remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in zsh up to 5.5. It has been classified as critical. Affected is some unknown functionality of the component Shebang Line Handler. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in zsh before 5.6. Shebang lines exceeding 64 characters were truncated, potentially leading to an execve call to a program name that is a substring of the intended one.

The bug was discovered 09/05/2018. The weakness was shared 09/05/2018 with Red Hat (Website). The advisory is available at bugs.debian.org. This vulnerability is traded as CVE-2018-13259 since 07/05/2018. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not 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 databases at Tenable (117525) and SecurityFocus (BID 103359†). The entries VDB-113890, VDB-113891, VDB-113902 and VDB-113903 are related to this item. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

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

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

NVD Base Score: 🔍

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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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

03/09/2018 🔍
07/05/2018 +117 days 🔍
09/05/2018 +62 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: RHSA-2019:2017
Organization: Red Hat
Status: Confirmed

CVE: CVE-2018-13259 (🔍)
GCVE (CVE): GCVE-0-2018-13259
GCVE (VulDB): GCVE-100-123594
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 09:01
Changes: 09/05/2018 14:37 (73), 03/20/2020 16:46 (5), 05/07/2023 09:01 (5)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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