Microsoft Windows up to Server 2019 Hardlink link following

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.1$5k-$25k0.00

A vulnerability classified as critical has been found in Microsoft Windows up to Server 2019 (Operating System). Affected is some unknown functionality of the component Hardlink 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 integrity, and availability. CVE summarizes:

A denial of service vulnerability exists when Windows improperly handles hard links, aka 'Microsoft Windows Denial of Service Vulnerability'.

The weakness was disclosed 10/08/2019 as confirmed security update guide (Website). The advisory is available at portal.msrc.microsoft.com. The public release has been coordinated in cooperation with the vendor. This vulnerability is traded as CVE-2019-1317 since 11/26/2018. It is possible to launch the attack remotely. A authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 09/26/2020). The advisory points out:

A denial of service vulnerability exists when Windows improperly handles hard links. An attacker who successfully exploited the vulnerability could cause a target system to stop responding.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The entries 143086, 143085, 143084 and 143083 are pretty similar.

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.3

VulDB Base Score: 8.5
VulDB Temp Score: 8.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 6.4
Vendor Vector (Microsoft): 🔍

NVD Base Score: 7.3
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Link following
CWE: CWE-59
ATT&CK: Unknown

Local: No
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: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

11/26/2018 🔍
10/08/2019 +316 days 🔍
10/08/2019 +0 days 🔍
10/08/2019 +0 days 🔍
09/26/2020 +354 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: portal.msrc.microsoft.com
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2019-1317 (🔍)
scip Labs: https://www.scip.ch/en/?labs.20161215
See also: 🔍

Entryinfo

Created: 10/08/2019 21:10
Updated: 09/26/2020 17:07
Changes: 10/08/2019 21:10 (72), 09/26/2020 17:07 (1)
Complete: 🔍

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