Microsoft .NET Framework up to 4.7.2 URL input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.6$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Microsoft .NET Framework up to 4.7.2. This vulnerability affects unknown code of the component URL Handler. Performing a manipulation results in input validation. This vulnerability is known as CVE-2019-0657. Remote exploitation of the attack is possible. No exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability classified as critical has been found in Microsoft .NET Framework up to 4.7.2 (Programming Language Software). This affects some unknown processing of the component URL Handler. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability.

The bug was discovered 02/12/2019. The weakness was published 02/12/2019 with NCC Group as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The public release has been coordinated with Microsoft. This vulnerability is uniquely identified as CVE-2019-0657 since 11/26/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The advisory points out:

A vulnerability exists in certain .Net Framework API's and Visual Studio in the way they parse URL's. An attacker who successfully exploited this vulnerability could use it to bypass security logic intended to ensure that a user-provided URL belonged to a specific hostname or a subdomain of that hostname. This could be used to cause privileged communication to be made to an untrusted service as if it was a trusted service.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 91503 (Microsoft .NET Framework Security Update February 2019).

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

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 106872†). Similar entry is available at VDB-130795. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.6

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
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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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Timelineinfo

11/26/2018 🔍
02/12/2019 +78 days 🔍
02/12/2019 +0 days 🔍
02/12/2019 +0 days 🔍
02/12/2019 +0 days 🔍
02/13/2019 +1 days 🔍
07/10/2023 +1608 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: RHSA-2019:0349
Organization: NCC Group
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2019-0657 (🔍)
GCVE (CVE): GCVE-0-2019-0657
GCVE (VulDB): GCVE-100-130815
SecurityFocus: 106872 - Microsoft .NET Framework and Visual Studio CVE-2019-0613 Remote Code Execution Vulnerability

See also: 🔍

Entryinfo

Created: 02/13/2019 10:04
Updated: 07/10/2023 08:24
Changes: 02/13/2019 10:04 (65), 05/10/2020 09:23 (6), 07/10/2023 08:24 (5)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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