Open Build Service up to 2.4.7/2.5.6/2.6.2 link following

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.
6.4$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Open Build Service up to 2.4.7/2.5.6/2.6.2. Impacted is an unknown function. Executing a manipulation can lead to link following. This vulnerability appears as CVE-2015-0796. The attack requires local access. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Open Build Service up to 2.4.7/2.5.6/2.6.2 and classified as problematic. This vulnerability affects an unknown part. The manipulation with an unknown input leads to a link following vulnerability. The CWE definition for the vulnerability is CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In open buildservice 2.6 before 2.6.3, 2.5 before 2.5.7 and 2.4 before 2.4.8 the source service patch application could generate non-standard files like symlinks or device nodes, which could allow buildservice users to break of confinement or cause denial of service attacks on the source service.

The bug was discovered 08/10/2015. The weakness was presented 03/02/2018 as Bug 941099 as not defined bug report (Bugzilla). The advisory is available at bugzilla.suse.com. This vulnerability was named CVE-2015-0796 since 01/07/2015. The exploitation appears to be easy. Local access is required to approach this attack. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available.

The vulnerability was handled as a non-public zero-day exploit for at least 935 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 2.4.8, 2.5.7 or 2.6.3 eliminates this vulnerability.

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Productinfo

Name

Version

License

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: 🔍

CNA Base Score: 6.3
CNA Vector (SUSE): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Link following
CWE: CWE-59
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Open Build Service 2.4.8/2.5.7/2.6.3
Patch: github.com

Timelineinfo

01/07/2015 🔍
08/10/2015 +215 days 🔍
03/02/2018 +935 days 🔍
03/02/2018 +0 days 🔍
03/03/2018 +1 days 🔍
02/16/2023 +1811 days 🔍

Sourcesinfo

Advisory: Bug 941099
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-0796 (🔍)
GCVE (CVE): GCVE-0-2015-0796
GCVE (VulDB): GCVE-100-113998

Entryinfo

Created: 03/03/2018 14:23
Updated: 02/16/2023 14:10
Changes: 03/03/2018 14:23 (59), 01/09/2020 22:16 (2), 02/16/2023 14:04 (4), 02/16/2023 14:10 (10)
Complete: 🔍
Cache ID: 216::103

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