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CVE-2026-40254

CVE-2026-40254 · FreeRDP: contains_dotdot() off-by-one allows drive channel path traversal via terminal ..

This page contains facts from public vulnerability sources. Check the original advisory before updating.

FreeRDP is a free implementation of the Remote Desktop Protocol. Versions prior to 3.25.0 have an off-by-one in the path traversal filter in `channels/drive/client/drive_file.c`. The `contains_dotdot()` function catches `../` and `..\` mid-path but misses `..` when it's the last component with no trailing separator. A rogue RDP server can read, list, or write files one directory above the client's shared folder through RDPDR requests. This requires the victim to connect with drive redirection enabled. Version 3.25.0 patches the issue.

CVSS 4.2 · Medium · EPSS 0.2% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • freerdp

    Versions
    • < 3.25.0: Affected

    No fix published

  • freerdp2 Debian:12

    Versions
    • 2.10.0+dfsg1-1
    • 2.10.0+dfsg1-1.1
    • 2.11.2+dfsg1-1
    • 2.11.2+dfsg1-1.1~exp1
    • 2.11.2+dfsg1-1.1~exp2
    • 2.11.5+dfsg1-1
    • 2.11.7+dfsg1-1
    • 2.11.7+dfsg1-2
    • 2.11.7+dfsg1-3
    • 2.11.7+dfsg1-4
    • 2.11.7+dfsg1-5
    • 2.11.7+dfsg1-6
    • 2.11.7+dfsg1-6~deb12u1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • freerdp3 Debian:13

    Versions
    • 3.15.0+dfsg-2.1
    • 3.15.0+dfsg-2.1+deb13u1
    • 3.15.0+dfsg-2.1+deb13u2
    Affected ranges
    • ECOSYSTEM: < 3.15.0+dfsg-2.1+deb13u3

    Update to 3.15.0+dfsg-2.1+deb13u3

  • freerdp3 Debian:14

    Versions
    • 3.15.0+dfsg-2.1
    • 3.16.0+dfsg-1
    • 3.16.0+dfsg-2
    • 3.17.0+dfsg-1
    • 3.17.1+dfsg-1
    • 3.17.1+dfsg-2
    • 3.17.2+dfsg-1
    • 3.17.2+dfsg-2
    • 3.17.2+dfsg-3
    • 3.18.0+dfsg-1
    • 3.19.0+dfsg-1
    • 3.19.1+dfsg-1
    • 3.20.0+dfsg-1
    • 3.20.2+dfsg-1
    • 3.21.0+dfsg-1
    • 3.22.0+dfsg-1
    • 3.22.0+dfsg-1~bpo13+0
    • 3.22.0+dfsg-1~bpo13+1
    • 3.22.0+dfsg-3
    • 3.23.0+dfsg-1
    • 3.23.0+dfsg-1~bpo13+1
    • 3.24.0+dfsg-1
    • 3.24.0+dfsg-2
    • 3.24.1+dfsg-1
    • 3.24.2+dfsg-1
    • 3.24.2+dfsg-1~bpo13+1
    Affected ranges
    • ECOSYSTEM: < 3.25.0+dfsg-1

    Update to 3.25.0+dfsg-1

  • freerdp Ubuntu:16.04:LTS

    Versions
    • 1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1
    • 1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.2
    • 1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.3
    • 1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • freerdp2 Ubuntu:Pro:18.04:LTS

    Versions
    • 2.0.0~git20170725.1.1648deb+dfsg1-1
    • 2.0.0~git20170725.1.1648deb+dfsg1-5
    • 2.0.0~git20170725.1.1648deb+dfsg1-5ubuntu1
    • 2.0.0~git20170725.1.1648deb+dfsg1-5ubuntu2
    • 2.0.0~git20170725.1.1648deb+dfsg1-6
    • 2.0.0~git20170725.1.1648deb+dfsg1-6build1
    • 2.0.0~git20170725.1.1648deb+dfsg1-7
    • 2.0.0~git20170725.1.1648deb+dfsg1-7ubuntu0.1
    • 2.1.1+dfsg1-0ubuntu0.18.04.1
    • 2.2.0+dfsg1-0ubuntu0.18.04.1
    • 2.2.0+dfsg1-0ubuntu0.18.04.2
    • 2.2.0+dfsg1-0ubuntu0.18.04.3
    • 2.2.0+dfsg1-0ubuntu0.18.04.4
    • 2.2.0+dfsg1-0ubuntu0.18.04.4+esm1
    • 2.2.0+dfsg1-0ubuntu0.18.04.4+esm2
    • 2.2.0+dfsg1-0ubuntu0.18.04.4+esm3
    • 2.2.0+dfsg1-0ubuntu0.18.04.4+esm4
    • 2.2.0+dfsg1-0ubuntu0.18.04.4+esm5
    • 2.2.0+dfsg1-0ubuntu0.18.04.4+esm6
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • freerdp Ubuntu:18.04:LTS

    Versions
    • 1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1
    • 1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.1
    • 1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • freerdp2 Ubuntu:Pro:20.04:LTS

    Versions
    • 2.0.0~git20190204.1.2693389a+dfsg1-1
    • 2.0.0~git20190204.1.2693389a+dfsg1-2
    • 2.0.0~git20190204.1.2693389a+dfsg1-2build1
    • 2.0.0~git20190204.1.2693389a+dfsg1-2build2
    • 2.1.1+dfsg1-0ubuntu0.20.04.1
    • 2.2.0+dfsg1-0ubuntu0.20.04.1
    • 2.2.0+dfsg1-0ubuntu0.20.04.2
    • 2.2.0+dfsg1-0ubuntu0.20.04.3
    • 2.2.0+dfsg1-0ubuntu0.20.04.4
    • 2.2.0+dfsg1-0ubuntu0.20.04.5
    • 2.2.0+dfsg1-0ubuntu0.20.04.6
    • 2.6.1+dfsg1-0ubuntu0.20.04.1
    • 2.6.1+dfsg1-0ubuntu0.20.04.2
    • 2.6.1+dfsg1-0ubuntu0.20.04.2+esm1
    • 2.6.1+dfsg1-0ubuntu0.20.04.2+esm2
    • 2.6.1+dfsg1-0ubuntu0.20.04.2+esm3
    • 2.6.1+dfsg1-0ubuntu0.20.04.2+esm4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • freerdp2 Ubuntu:22.04:LTS

    Versions
    • 2.3.0+dfsg1-2build1
    • 2.3.0+dfsg1-2ubuntu1
    • 2.3.0+dfsg1-2ubuntu2
    • 2.4.1+dfsg1-1
    • 2.4.1+dfsg1-1ubuntu1
    • 2.4.1+dfsg1-1ubuntu2
    • 2.5.0+dfsg1-1
    • 2.6.0+dfsg1-1
    • 2.6.1+dfsg1-1
    • 2.6.1+dfsg1-3
    • 2.6.1+dfsg1-3ubuntu1
    • 2.6.1+dfsg1-3ubuntu2
    • 2.6.1+dfsg1-3ubuntu2.1
    • 2.6.1+dfsg1-3ubuntu2.2
    • 2.6.1+dfsg1-3ubuntu2.3
    • 2.6.1+dfsg1-3ubuntu2.4
    • 2.6.1+dfsg1-3ubuntu2.5
    • 2.6.1+dfsg1-3ubuntu2.6
    • 2.6.1+dfsg1-3ubuntu2.7
    • 2.6.1+dfsg1-3ubuntu2.8
    • 2.6.1+dfsg1-3ubuntu2.9
    • 2.6.1+dfsg1-3ubuntu2.10
    • 2.6.1+dfsg1-3ubuntu2.11
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • freerdp3 Ubuntu:24.04:LTS

    Versions
    • 3.4.0+dfsg1-0ubuntu2
    • 3.4.0+dfsg1-0ubuntu3
    • 3.4.0+dfsg1-0ubuntu4
    • 3.5.0+dfsg1-0ubuntu1
    • 3.5.1+dfsg1-0ubuntu1
    • 3.5.1+dfsg1-0ubuntu1.1
    • 3.5.1+dfsg1-0ubuntu1.2
    • 3.5.1+dfsg1-0ubuntu1.4
    • 3.5.1+dfsg1-0ubuntu1.5
    • 3.5.1+dfsg1-0ubuntu1.6
    Affected ranges
    • ECOSYSTEM: < 3.30.0+dfsg-0ubuntu0.24.04.1

    Update to 3.30.0+dfsg-0ubuntu0.24.04.1

  • freerdp2 Ubuntu:Pro:24.04:LTS

    Versions
    • 2.10.0+dfsg1-1.1ubuntu1
    • 2.11.2+dfsg1-1
    • 2.11.2+dfsg1-1build1
    • 2.11.2+dfsg1-1build3
    • 2.11.5+dfsg1-1build1
    • 2.11.5+dfsg1-1build2
    • 2.11.5+dfsg1-1ubuntu0.1~esm1
    • 2.11.5+dfsg1-1ubuntu0.1~esm2
    • 2.11.5+dfsg1-1ubuntu0.1~esm3
    • 2.11.5+dfsg1-1ubuntu0.1~esm4
    • 2.11.5+dfsg1-1ubuntu0.1~esm5
    • 2.11.5+dfsg1-1ubuntu0.1~esm6
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • freerdp3 Ubuntu:25.10

    Versions
    • 3.14.0+dfsg-1ubuntu1
    • 3.15.0+dfsg-2.1
    • 3.16.0+dfsg-1ubuntu1
    • 3.16.0+dfsg-2
    • 3.16.0+dfsg-2ubuntu0.1
    • 3.16.0+dfsg-2ubuntu0.3
    • 3.16.0+dfsg-2ubuntu0.4
    • 3.16.0+dfsg-2ubuntu0.5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • freerdp3 Ubuntu:26.04:LTS

    Versions
    • 3.16.0+dfsg-2
    • 3.18.0+dfsg-1ubuntu1
    • 3.19.0+dfsg-1
    • 3.19.1+dfsg-1
    • 3.20.0+dfsg-1
    • 3.20.2+dfsg-1
    • 3.21.0+dfsg-1
    • 3.22.0+dfsg-1
    • 3.24.1+dfsg-1ubuntu1
    • 3.24.2+dfsg-1ubuntu1
    • 3.24.2+dfsg-1ubuntu1.1
    Affected ranges
    • ECOSYSTEM: < 3.30.0+dfsg-0ubuntu0.26.04.1

    Update to 3.30.0+dfsg-0ubuntu0.26.04.1

Original sources

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