CVE-2023-27534: Path Traversal
First published: Thu Mar 16 2023(Updated: )
A path traversal vulnerability exists in curl <8.0.0 SFTP implementation causes the tilde (~) character to be wrongly replaced when used as a prefix in the first path element, in addition to its intended use as the first element to indicate a path relative to the user's home directory. Attackers can exploit this flaw to bypass filtering or execute arbitrary code by crafting a path like /~2/foo while accessing a server with a specific user.
Credit: support@hackerone.com support@hackerone.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/curl | <8.0.0 | 8.0.0 |
| IBM IBM® Engineering Requirements Management DOORS | <=9.7.2.7 | |
| IBM IBM® Engineering Requirements Management DOORS Web Access | <=9.7.2.7 | |
| Haxx Curl | >=7.18.0<=7.88.1 | |
| Fedoraproject Fedora | =36 | |
| Netapp Active Iq Unified Manager Vmware Vsphere | ||
| Broadcom Brocade Fabric Operating System Firmware | ||
| All of | ||
| Netapp H300s Firmware | ||
| Netapp H300s | ||
| All of | ||
| Netapp H500s Firmware | ||
| Netapp H500s | ||
| All of | ||
| Netapp H700s Firmware | ||
| Netapp H700s | ||
| All of | ||
| Netapp H410s Firmware | ||
| Netapp H410s | ||
| Splunk Universal Forwarder | >=8.2.0<8.2.12 | |
| Splunk Universal Forwarder | >=9.0.0<9.0.6 | |
| Splunk Universal Forwarder | =9.1.0 | |
| Netapp H300s Firmware | ||
| Netapp H300s | ||
| Netapp H500s Firmware | ||
| Netapp H500s | ||
| Netapp H700s Firmware | ||
| Netapp H700s | ||
| Netapp H410s Firmware | ||
| Netapp H410s |
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Reference Links
- https://hackerone.com/reports/1892351
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/
- https://security.gentoo.org/glsa/202310-12
- https://security.netapp.com/advisory/ntap-20230420-0012/
- https://datatracker.ietf.org/doc/html/draft-ietf-secsh-scp-sftp-ssh-uri-04
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2180434
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2180436
- https://access.redhat.com/errata/RHSA-2023:3355
- https://access.redhat.com/errata/RHSA-2023:3354
- https://access.redhat.com/errata/RHSA-2023:6679
- https://bugzilla.redhat.com/show_bug.cgi?id=2179069
- https://exchange.xforce.ibmcloud.com/vulnerabilities/250529
- https://www.ibm.com/support/pages/node/7124058 (Advisory)
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/
- https://lists.debian.org/debian-lts-announce/2024/03/msg00016.html
Frequently Asked Questions
What is the severity of CVE-2023-27534?
The severity of CVE-2023-27534 is high with a severity value of 8.8.
How does the path traversal vulnerability in CVE-2023-27534 impact curl <8.0.0 SFTP implementation?
The path traversal vulnerability in CVE-2023-27534 allows attackers to wrongly replace the tilde (~) character when used as a prefix in the first path element, causing potential unauthorized access to files outside the intended directory.
Which software versions are affected by CVE-2023-27534?
The curl versions prior to 8.0.0 and between 7.18.0 and 7.88.1 are affected by CVE-2023-27534.
How can I fix the path traversal vulnerability in curl <8.0.0?
To fix the path traversal vulnerability in curl <8.0.0, you should update curl to version 8.0.0 or higher.
Where can I find more information about CVE-2023-27534?
You can find more information about CVE-2023-27534 in the provided references: [link1](https://datatracker.ietf.org/doc/html/draft-ietf-secsh-scp-sftp-ssh-uri-04), [link2](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2180434), [link3](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2180436).
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