FreeRDP up to 2.0.0-rc3 nsc_rle_decode out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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8.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in FreeRDP up to 2.0.0-rc3. The impacted element is the function nsc_rle_decode. The manipulation results in out-of-bounds write. This vulnerability is reported as CVE-2018-8788. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in FreeRDP up to 2.0.0-rc3. Affected is the function nsc_rle_decode. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

FreeRDP prior to version 2.0.0-rc4 contains an Out-Of-Bounds Write of up to 4 bytes in function nsc_rle_decode() that results in a memory corruption and possibly even a remote code execution.

The bug was discovered 02/05/2019. The weakness was disclosed 11/29/2018 (GitHub Repository). The advisory is shared for download at github.com. This vulnerability is traded as CVE-2018-8788 since 03/19/2018. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 119655 (Ubuntu 14.04 LTS : freerdp, freerdp2 vulnerabilities (USN-3845-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197329 (Ubuntu Security Notification for FreeRDP Vulnerabilities (USN-3845-1)).

Upgrading to version 2.0.0-rc4 eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (119655) and SecurityFocus (BID 106938†). The entries VDB-127328, VDB-127329, VDB-127330 and VDB-127331 are pretty similar. Once again VulDB remains the best 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: 8.5
VulDB Meta Temp Score: 8.1

VulDB Base Score: 7.3
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
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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Nessus ID: 119655
Nessus Name: Ubuntu 14.04 LTS : freerdp, freerdp2 vulnerabilities (USN-3845-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: FreeRDP 2.0.0-rc4
Patch: github.com

Timelineinfo

03/19/2018 🔍
11/29/2018 +255 days 🔍
11/29/2018 +0 days 🔍
11/30/2018 +1 days 🔍
12/12/2018 +12 days 🔍
12/13/2018 +1 days 🔍
02/05/2019 +54 days 🔍
02/05/2019 +0 days 🔍
06/12/2023 +1588 days 🔍

Sourcesinfo

Product: github.com

Advisory: USN-3845-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-8788 (🔍)
GCVE (CVE): GCVE-0-2018-8788
GCVE (VulDB): GCVE-100-127332
SecurityFocus: 106938 - RDP Client 'FreeRDP' And 'rdesktop' Multiple Security Vulnerabilities

See also: 🔍

Entryinfo

Created: 11/30/2018 07:54
Updated: 06/12/2023 11:05
Changes: 11/30/2018 07:54 (73), 04/16/2020 11:39 (5), 06/12/2023 10:59 (5), 06/12/2023 11:05 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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