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Medium ALSA-2023:2851 9 CVEs

Moderate: freerdp security update

Published May 16, 2023 · Updated Oct 29, 2026

Ecosystem: AlmaLinux

Summary

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. The xfreerdp client can connect to RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox.

Security Fix(es):

* freerdp: clients using `/parallel` command line switch might read uninitialized data (CVE-2022-39282)
* freerdp: clients using the `/video` command line switch might read uninitialized data (CVE-2022-39283)
* freerdp: out of bounds read in zgfx decoder (CVE-2022-39316)
* freerdp: undefined behaviour in zgfx decoder (CVE-2022-39317)
* freerdp: division by zero in urbdrc channel (CVE-2022-39318)
* freerdp: missing length validation in urbdrc channel (CVE-2022-39319)
* freerdp: heap buffer overflow in urbdrc channel (CVE-2022-39320)
* freerdp: missing path sanitation with `drive` channel (CVE-2022-39347)
* freerdp: missing input length validation in `drive` channel (CVE-2022-41877)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

Fixed packages 5

ReleasePackageFixed in
AlmaLinux · 8 freerdp 2:2.2.0-10.el8
AlmaLinux · 8 freerdp-devel 2:2.2.0-10.el8
AlmaLinux · 8 freerdp-libs 2:2.2.0-10.el8
AlmaLinux · 8 libwinpr 2:2.2.0-10.el8
AlmaLinux · 8 libwinpr-devel 2:2.2.0-10.el8

Vulnerabilities 9

  • Medium 5.9
    CVE-2022-39283

    FreeRDP may read and display out of bounds data

    FreeRDP is a free remote desktop protocol library and clients. All FreeRDP based clients when using the `/video` command line switch might read uninitialized data, decode it as audio/video and display the result. FreeRDP based server implementations are not a…

    FreeRDP FreeRDP freerdp2 freerdp2 Debian Ubuntu
  • Medium 5.5
    CVE-2022-39320

    Heap buffer overflow in urbdrc channel

    FreeRDP is a free remote desktop protocol library and clients. Affected versions of FreeRDP may attempt integer addition on too narrow types leads to allocation of a buffer too small holding the data written. A malicious server can trick a FreeRDP based clien…

    FreeRDP FreeRDP freerdp2 freerdp2 Debian Ubuntu Alpine
  • Medium 4.8
    CVE-2022-39316

    Out of bound read in FreeRDP

    FreeRDP is a free remote desktop protocol library and clients. In affected versions there is an out of bound read in ZGFX decoder component of FreeRDP. A malicious server can trick a FreeRDP based client to read out of bound data and try to decode it likely r…

    FreeRDP FreeRDP freerdp2 freerdp2 Debian Ubuntu Alpine
  • Medium 4.8
    CVE-2022-39318

    Division by zero in urbdrc channel in FreeRDP

    FreeRDP is a free remote desktop protocol library and clients. Affected versions of FreeRDP are missing input validation in `urbdrc` channel. A malicious server can trick a FreeRDP based client to crash with division by zero. This issue has been addressed in …

    FreeRDP FreeRDP freerdp2 freerdp2 Debian Ubuntu Alpine
  • Medium 4.6
    CVE-2022-39317

    Out of bounds read in zgfx decoder in FreeRDP

    FreeRDP is a free remote desktop protocol library and clients. Affected versions of FreeRDP are missing a range check for input offset index in ZGFX decoder. A malicious server can trick a FreeRDP based client to read out of bound data and try to decode it. T…

    FreeRDP FreeRDP freerdp2 freerdp2 Debian Ubuntu Alpine
  • Medium 4.6
    CVE-2022-39319

    Missing length validation in urbdrc channel in FreeRDP

    FreeRDP is a free remote desktop protocol library and clients. Affected versions of FreeRDP are missing input length validation in the `urbdrc` channel. A malicious server can trick a FreeRDP based client to read out of bound data and send it back to the serv…

    FreeRDP FreeRDP freerdp2 freerdp2 Debian Ubuntu Alpine
  • Medium 4.6
    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. T…

    FreeRDP FreeRDP freerdp2 freerdp2 Debian Ubuntu Alpine
  • Low 3.5
    CVE-2022-39282

    RDP client: Read of uninitialized memory with parallel port redirection

    FreeRDP is a free remote desktop protocol library and clients. FreeRDP based clients on unix systems using `/parallel` command line switch might read uninitialized data and send it to the server the client is currently connected to. FreeRDP based server imple…

    FreeRDP FreeRDP freerdp2 freerdp2 Debian Ubuntu
  • Low 2.6
    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 directo…

    FreeRDP FreeRDP freerdp2 freerdp2 Debian Ubuntu Alpine

References

  • report
    https://access.redhat.com/security/cve/CVE-2022-39282
  • report
    https://access.redhat.com/security/cve/CVE-2022-39283
  • report
    https://access.redhat.com/security/cve/CVE-2022-39316
  • report
    https://access.redhat.com/security/cve/CVE-2022-39317
  • report
    https://access.redhat.com/security/cve/CVE-2022-39318
  • report
    https://access.redhat.com/security/cve/CVE-2022-39319
  • report
    https://access.redhat.com/security/cve/CVE-2022-39320
  • report
    https://access.redhat.com/security/cve/CVE-2022-39347
  • report
    https://access.redhat.com/security/cve/CVE-2022-41877
  • report
    https://bugzilla.redhat.com/2134713
  • report
    https://bugzilla.redhat.com/2134717
  • report
    https://bugzilla.redhat.com/2143642
  • report
    https://bugzilla.redhat.com/2143643
  • report
    https://bugzilla.redhat.com/2143644
  • report
    https://bugzilla.redhat.com/2143645
  • report
    https://bugzilla.redhat.com/2143646
  • report
    https://bugzilla.redhat.com/2143647
  • report
    https://bugzilla.redhat.com/2143648
  • advisory
    https://errata.almalinux.org/8/ALSA-2023-2851.html