FreeRDP up to 2.11.5/3.4.x NSC Codec integer underflow
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
7.9 | $0-$5k | 0.00 |
A vulnerability was found in FreeRDP up to 2.11.5/3.4.x and classified as critical. This issue affects an unknown part of the component NSC Codec. The manipulation with an unknown input leads to a integer underflow vulnerability. Using CWE to declare the problem leads to CWE-191. The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result. Impacted is confidentiality, integrity, and availability. The summary by CVE is:
FreeRDP is a free implementation of the Remote Desktop Protocol. FreeRDP based clients that use a version of FreeRDP prior to 3.5.0 or 2.11.6 and have connections to servers using the `NSC` codec are vulnerable to integer underflow. Versions 3.5.0 and 2.11.6 patch the issue. As a workaround, do not use the NSC codec (e.g. use `-nsc`).
The advisory is shared at github.com. The identification of this vulnerability is CVE-2024-32040 since 04/09/2024. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.
Upgrading to version 2.11.6 or 3.5.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.
Product
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔒VulDB CVSS-BT Score: 🔒
VulDB Vector: 🔒
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 8.1VulDB Meta Temp Score: 7.9
VulDB Base Score: 8.1
VulDB Temp Score: 7.7
VulDB Vector: 🔒
VulDB Reliability: 🔍
CNA Base Score: 8.1
CNA Vector (GitHub, Inc.): 🔒
CVSSv2
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Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Exploiting
Class: Integer underflowCWE: CWE-191 / CWE-189
CAPEC: 🔒
ATT&CK: 🔒
Local: No
Remote: Yes
Availability: 🔒
Status: Not defined
EPSS Score: 🔒
EPSS Percentile: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒
0-Day | unlock | unlock | unlock | unlock |
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Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔒
Upgrade: FreeRDP 2.11.6/3.5.0
Patch: github.com
Timeline
04/09/2024 CVE reserved04/23/2024 Advisory disclosed
04/23/2024 VulDB entry created
04/23/2024 VulDB entry last update
Sources
Advisory: GHSA-23c5-cp23-h2h5Status: Confirmed
CVE: CVE-2024-32040 (🔒)
Entry
Created: 04/23/2024 08:00Changes: 04/23/2024 08:00 (65)
Complete: 🔍
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