zsh up to 5.0.5 Symbolic Links utils.c memory corruption

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, has been found in zsh up to 5.0.5. This affects an unknown function of the file utils.c of the component Symbolic Links Handler. The manipulation leads to memory corruption. This vulnerability is documented as CVE-2014-10072. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in zsh up to 5.0.5 and classified as critical. This issue affects an unknown functionality of the file utils.c of the component Symbolic Links Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In utils.c in zsh before 5.0.6, there is a buffer overflow when scanning very long directory paths for symbolic links.

The bug was discovered 01/20/2014. The weakness was released 02/27/2018 with Red Hat (Website). It is possible to read the advisory at sourceforge.net. The identification of this vulnerability is CVE-2014-10072 since 02/27/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

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 110652 (CentOS 6 : zsh (CESA-2018:1932)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157839 (Oracle Enterprise Linux Security Update for zsh (ELSA-2018-3073)).

Upgrading to version 5.0.6 eliminates this vulnerability. A possible mitigation has been published 5 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (110652) and SecurityFocus (BID 103359†). Entries connected to this vulnerability are available at VDB-113890, VDB-113902, VDB-113903 and VDB-113923. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
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: 110652
Nessus Name: CentOS 6 : zsh (CESA-2018:1932)
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 5.0.6
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 🔍
03/09/2018 +9 days 🔍
06/21/2018 +104 days 🔍
06/22/2018 +1 days 🔍
02/16/2023 +1700 days 🔍

Sourcesinfo

Advisory: RHSA-2018:1932
Organization: Red Hat
Status: Confirmed

CVE: CVE-2014-10072 (🔍)
GCVE (CVE): GCVE-0-2014-10072
GCVE (VulDB): GCVE-100-113891
SecurityFocus: 103359 - Zsh 'exec.c:hashcmd()' Function Local Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 02/28/2018 08:09
Updated: 02/16/2023 07:00
Changes: 02/28/2018 08:09 (76), 01/09/2020 08:43 (5), 02/16/2023 07:00 (5)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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