RPM Installation link following

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in RPM. Affected by this vulnerability is an unknown functionality of the component Installation Handler. Performing a manipulation results in link following. This vulnerability was named CVE-2017-7500. The attack needs to be approached locally. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in RPM (version now known). It has been classified as critical. This affects some unknown processing of the component Installation Handler. The manipulation with an unknown input leads to a link following vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

It was found that rpm did not properly handle RPM installations when a destination path was a symbolic link to a directory, possibly changing ownership and permissions of an arbitrary directory, and RPM files being placed in an arbitrary destination. An attacker, with write access to a directory in which a subdirectory will be installed, could redirect that directory to an arbitrary location and gain root privilege.

The bug was discovered 08/02/2017. The weakness was presented 08/13/2018 as confirmed bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2017-7500 since 04/05/2017. An attack has to be approached locally. Required for exploitation is a authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 97 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 104447 (Fedora 26 : rpm (2017-9232eac8e8)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171665 (SUSE Enterprise Linux Security Update for rpm (SUSE-SU-2018:3286-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (104447). See VDB-109855 for similar entry. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.6

VulDB Base Score: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CNA Base Score: 7.3
CNA Vector (Red Hat, Inc.): 🔍

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: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 104447
Nessus Name: Fedora 26 : rpm (2017-9232eac8e8)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 57779
OpenVAS Name: Fedora Update for rpm FEDORA-2017-ab57a100f3
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

04/05/2017 🔍
08/02/2017 +119 days 🔍
11/06/2017 +96 days 🔍
11/08/2017 +1 days 🔍
08/13/2018 +277 days 🔍
08/13/2018 +0 days 🔍
08/14/2018 +1 days 🔍
05/01/2023 +1721 days 🔍

Sourcesinfo

Advisory: FEDORA-2017-9232eac8e8
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-7500 (🔍)
GCVE (CVE): GCVE-0-2017-7500
GCVE (VulDB): GCVE-100-122793
See also: 🔍

Entryinfo

Created: 08/14/2018 06:45
Updated: 05/01/2023 13:55
Changes: 08/14/2018 06:45 (72), 03/15/2020 08:54 (2), 05/01/2023 13:43 (5), 05/01/2023 13:49 (12), 05/01/2023 13:55 (1)
Complete: 🔍
Cache ID: 216::103

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

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