FreeRDP up to 2.0.0-rc3 zgfx_decompress_segment 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 described as critical has been identified in FreeRDP up to 2.0.0-rc3. This vulnerability affects the function zgfx_decompress_segment. Such manipulation leads to memory corruption. This vulnerability is listed as CVE-2018-8784. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in FreeRDP up to 2.0.0-rc3 and classified as critical. Affected by this issue is the function zgfx_decompress_segment. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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

The bug was discovered 10/22/2018. The weakness was presented 11/29/2018 (GitHub Repository). The advisory is shared for download at github.com. This vulnerability is handled as CVE-2018-8784 since 03/19/2018. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, 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†). See VDB-127329, VDB-127330, VDB-127331 and VDB-127332 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Website

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: 17c363a5162fd4dc77b1df54e48d7bd9bf6b3be7
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-8784 (🔍)
GCVE (CVE): GCVE-0-2018-8784
GCVE (VulDB): GCVE-100-127328
SecurityFocus: 106938 - RDP Client 'FreeRDP' And 'rdesktop' Multiple Security Vulnerabilities

See also: 🔍

Entryinfo

Created: 11/30/2018 07:54
Updated: 06/12/2023 10:19
Changes: 11/30/2018 07:54 (74), 04/16/2020 11:19 (5), 06/12/2023 10:13 (5), 06/12/2023 10:19 (1)
Complete: 🔍
Cache ID: 216::103

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