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CVE Record

CVE-2022-41877: Missing input length validation in `drive` channel in FreeRDP

FreeRDP is a free remote desktop protocol library and clients. Affected versions of FreeRDP are missing input length validation in `drive` channel. A malicious server can trick a FreeRDP based client to read out of bound data and send it back to the server. This issue has been addressed in version 2.9.0 and all users are advised to upgrade. Users unable to upgrade should not use the drive redirection channel - command line options `/drive`, `+drives` or `+home-drive`.

MediumCVSS 4.6Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

FreeRDP clients before 2.9.0 can mishandle data from a malicious RDP server when drive redirection is enabled. The server may cause the client to read data outside expected bounds and send it back. This is not marked as actively exploited in the provided sources, but it can expose client-side data in risky connection scenarios.

Executive priority

Prioritize routine remediation, with faster action for administrators or support teams connecting to external RDP servers. The issue is medium severity and source-supported fixes exist, but current evidence does not show active exploitation.

Technical view

CVE-2022-41877 is a CWE-119 missing input length validation issue in FreeRDP's drive channel. A malicious server can trigger an out-of-bounds read in an affected FreeRDP-based client and receive the resulting data. Sources state the issue is fixed in FreeRDP 2.9.0; affected versions are FreeRDP earlier than 2.9.0.

Likely exposure

Exposure is most likely on workstations, jump hosts, or tooling that use FreeRDP clients or libraries before 2.9.0 and connect to untrusted or compromised RDP servers with drive redirection enabled.

Exploitation context

The source bundle does not indicate CISA KEV listing or confirmed active exploitation. Exploitation requires a malicious server-side condition and user/client interaction. Risk rises where users connect to third-party RDP endpoints or where drive redirection is routinely enabled.

Researcher notes

Focus analysis on the FreeRDP drive channel and affected client-side code before 2.9.0. The public advisory and fixing commit are the primary technical references. Distribution advisories may contain patched backport versions that differ from upstream version numbering.

Mitigation direction

  • Upgrade FreeRDP to version 2.9.0 or later.
  • Apply distribution security updates from Fedora, Debian, Gentoo, or relevant package maintainers.
  • Disable drive redirection if upgrade is delayed.
  • Avoid `/drive`, `+drives`, and `+home-drive` options until fixed.
  • Check vendor guidance for platform-specific package names and backports.

Validation and detection

  • Inventory systems using FreeRDP clients or FreeRDP-based tools.
  • Confirm installed FreeRDP versions are 2.9.0 or patched backports.
  • Review client launchers and scripts for drive redirection options.
  • Check package advisory status for Fedora, Debian, Gentoo, or your distribution.
  • Document exceptions where drive redirection remains enabled.
Prepared
Confidence
high
Sources
9

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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cwe · low confidence lookup

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cve · low confidence lookup

CVE-2022-41877 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.6 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
8Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
4.6CVSS 3.1MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L1.23.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.6Medium
CVSS 3.1 vector shape for CVE-2022-41877Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
FreeRDPFreeRDP< 2.9.0Listed
Weakness

CWE details

CWE-119

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.