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CVE Record

CVE-2022-39347: Missing path sanitation with `drive` channel in FreeRDP

FreeRDP is a free remote desktop protocol library and clients. Affected versions of FreeRDP are missing path canonicalization and base path check for `drive` channel. A malicious server can trick a FreeRDP based client to read files outside the shared directory. 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`, `/drives` or `+home-drive` redirection switch.

LowCVSS 2.6Not KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

CVE-2022-39347 affects FreeRDP clients before 2.9.0 when drive sharing is enabled. A malicious RDP server could cause the client to read files outside the directory the user intended to share. The impact is limited confidentiality exposure, but it matters where users connect to untrusted RDP servers.

Executive priority

Treat this as a low-severity remediation item unless FreeRDP is widely used with drive sharing to untrusted servers. Prioritize standard patching and configuration hygiene over emergency response.

Technical view

FreeRDP lacked path canonicalization and a base path check in the drive channel. This CWE-22 path traversal issue allowed a malicious server to escape the shared directory boundary on affected clients. The advisory says the issue is fixed in FreeRDP 2.9.0.

Likely exposure

Exposure is most likely on endpoints or jump hosts running FreeRDP before 2.9.0 with /drive, /drives, or +home-drive redirection enabled. Risk increases when users connect to RDP servers they do not fully trust.

Exploitation context

The source bundle does not show active exploitation, and KEV is false. Exploitation requires user interaction and a malicious server. The CVSS 3.1 score is 2.6, reflecting low confidentiality impact and high attack complexity.

Researcher notes

The key behavior is boundary escape in the drive channel caused by missing canonicalization and base path validation. The fix is linked in the FreeRDP commit. Evidence supports affected FreeRDP versions before 2.9.0, but not active exploitation.

Mitigation direction

  • Upgrade FreeRDP to version 2.9.0 or later.
  • If upgrading is blocked, disable /drive, /drives, and +home-drive redirection.
  • Review Fedora, Debian, and Gentoo advisories for packaged update availability.
  • Avoid drive redirection when connecting to untrusted RDP servers.

Validation and detection

  • Inventory installed FreeRDP versions and flag anything before 2.9.0.
  • Review launcher scripts and profiles for drive redirection switches.
  • Confirm patched distro packages are deployed where applicable.
  • Check remote access procedures for use of untrusted RDP servers.
Prepared
Confidence
high
Sources
7

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 · medium confidence lookup

CWE-22: File access and web shell behavior lookup

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cve · low confidence lookup

CVE-2022-39347 mapping review

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Vulnerability profileCVE Program record
Severity
Low
CVSS
2.6 (3.1)
Known Exploited
No
Published

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

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
2.6CVSS 3.1LowCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N1.21.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

2.6Low
CVSS 3.1 vector shape for CVE-2022-39347Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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-22

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