Red Hat OpenStack 5.3.0/6.1.0/7.2.0 instack-undercloud link following

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Red Hat OpenStack 5.3.0/6.1.0/7.2.0. It has been classified as problematic. The impacted element is an unknown function of the component instack-undercloud. This manipulation causes link following. This vulnerability appears as CVE-2017-7549. The attack requires local access. There is no available exploit.

Detailsinfo

A vulnerability classified as problematic was found in Red Hat OpenStack 5.3.0/6.1.0/7.2.0 (Cloud Software). Affected by this vulnerability is an unknown code block of the component instack-undercloud. 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. The summary by CVE is:

A flaw was found in instack-undercloud 7.2.0 as packaged in Red Hat OpenStack Platform Pike, 6.1.0 as packaged in Red Hat OpenStack Platform Oacta, 5.3.0 as packaged in Red Hat OpenStack Newton, where pre-install and security policy scripts used insecure temporary files. A local user could exploit this flaw to conduct a symbolic-link attack, allowing them to overwrite the contents of arbitrary files.

The bug was discovered 08/01/2017. The weakness was presented 09/21/2017 by Matt as Bug 1477403 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is known as CVE-2017-7549 since 04/05/2017. An attack has to be approached locally. The requirement for exploitation is a single authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/05/2024).

The vulnerability was handled as a non-public zero-day exploit for at least 51 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 210329 (RHEL 7 : instack-undercloud (RHSA-2017:2557)), which helps to determine the existence of the flaw in a target environment. The commercial vulnerability scanner Qualys is able to test this issue with plugin 236495 (Red Hat Update for instack-undercloud (RHSA-2017:2726)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (210329) and SecurityFocus (BID 100407†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.8
VulDB Meta Temp Score: 5.8

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

NVD Base Score: 6.4
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: Link following
CWE: CWE-59
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: 210329
Nessus Name: RHEL 7 : instack-undercloud (RHSA-2017:2557)

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/05/2017 🔍
08/01/2017 +118 days 🔍
08/14/2017 +13 days 🔍
09/21/2017 +38 days 🔍
09/21/2017 +0 days 🔍
09/22/2017 +1 days 🔍
11/05/2024 +2601 days 🔍

Sourcesinfo

Vendor: redhat.com

Advisory: Bug 1477403
Researcher: Matthew Booth. (Matt)
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-7549 (🔍)
GCVE (CVE): GCVE-0-2017-7549
GCVE (VulDB): GCVE-100-106993
SecurityFocus: 100407 - Openstack instack-undercloud CVE-2017-7549 Insecure Temporary File Handling Vulnerability

Entryinfo

Created: 09/22/2017 08:56
Updated: 11/05/2024 17:06
Changes: 09/22/2017 08:56 (64), 11/18/2019 17:56 (5), 01/14/2021 07:26 (2), 11/05/2024 17:06 (16)
Complete: 🔍
Cache ID: 216::103

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

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