Bug 2498488 - CVE-2026-54591 python-asyncssh: AsyncSSH: Arbitrary file write via path traversal in SCP client [fedora-all]
Summary: CVE-2026-54591 python-asyncssh: AsyncSSH: Arbitrary file write via path trave...
Keywords:
Status: ON_QA
Alias: None
Product: Fedora
Classification: Fedora
Component: python-asyncssh
Version: rawhide
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Georg Sauthoff
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["4eed9dd9-fc37-41ac-9e83-4...
Depends On:
Blocks: CVE-2026-54591
TreeView+ depends on / blocked
 
Reported: 2026-07-09 12:39 UTC by Srikanth Balasubramanian
Modified: 2026-07-12 01:51 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Srikanth Balasubramanian 2026-07-09 12:39:26 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

AsyncSSH is a Python package which provides an asynchronous client and server implementation of the SSHv2 protocol on top of the Python asyncio framework. Prior to 2.23.1, a malicious SSH server can write arbitrary files on the asyncssh SCP client's filesystem by sending filenames containing ../ traversal sequences because _parse_cd_args in scp.py returns server-provided names verbatim and _recv_files joins them to the destination path without enforcing the target directory boundary. This issue is fixed in version 2.23.1.

Comment 1 Fedora Update System 2026-07-11 21:55:25 UTC
FEDORA-2026-1f248487e4 (python-asyncssh-2.24.0-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-1f248487e4

Comment 2 Fedora Update System 2026-07-11 23:26:07 UTC
FEDORA-2026-574496d9ae (python-asyncssh-2.23.1-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-574496d9ae

Comment 3 Fedora Update System 2026-07-12 01:33:31 UTC
FEDORA-2026-1f248487e4 has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-1f248487e4`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-1f248487e4

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 4 Fedora Update System 2026-07-12 01:51:29 UTC
FEDORA-2026-574496d9ae has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-574496d9ae`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-574496d9ae

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.


Note You need to log in before you can comment on or make changes to this bug.