FreeRDP up to 2.0.0-rc3 zgfx_decompress memory corruption

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

Summaryinfo

A vulnerability classified as critical has been found in FreeRDP up to 2.0.0-rc3. This issue affects the function zgfx_decompress. Performing a manipulation results in memory corruption. This vulnerability is cataloged as CVE-2018-8785. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in FreeRDP up to 2.0.0-rc3. It has been classified as critical. This affects the function zgfx_decompress. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

FreeRDP prior to version 2.0.0-rc4 contains a Heap-Based Buffer Overflow in function zgfx_decompress() that results in a memory corruption and probably even a remote code execution.

The bug was discovered 10/22/2018. The weakness was shared 11/29/2018 (GitHub Repository). The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2018-8785 since 03/19/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 38 days. During that time the estimated underground price was around $0-$5k. 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-127330, VDB-127331 and VDB-127332 are related to this item. 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: 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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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: 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 🔍
10/22/2018 +217 days 🔍
11/29/2018 +38 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 🔍
06/12/2023 +1588 days 🔍

Sourcesinfo

Product: github.com

Advisory: 602f4a2e14b41703b5f431de3154cd46a5750a2d
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-8785 (🔍)
GCVE (CVE): GCVE-0-2018-8785
GCVE (VulDB): GCVE-100-127329
SecurityFocus: 106938 - RDP Client 'FreeRDP' And 'rdesktop' Multiple Security Vulnerabilities

See also: 🔍

Entryinfo

Created: 11/30/2018 07:54
Updated: 06/12/2023 10:30
Changes: 11/30/2018 07:54 (74), 04/16/2020 11:23 (5), 06/12/2023 10:24 (5), 06/12/2023 10:30 (1)
Complete: 🔍
Cache ID: 216::103

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

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