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CVE-2023-27534

Date: March 29, 2023

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.

Language: C

Severity Score

Related Resources (12)

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/
https://lists.debian.org/debian-lts-announce/2024/03/msg00016.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/
https://nvd.nist.gov/vuln/detail/CVE-2023-27534
https://hackerone.com/reports/1892351
https://github.com/curl/curl/commit/4e2b52b5f7a3bf50a
https://access.redhat.com/security/cve/CVE-2023-27534
https://security-tracker.debian.org/tracker/CVE-2023-27534
https://security.gentoo.org/glsa/202310-12
https://seclists.org/oss-sec/2023/q1/175
https://security.netapp.com/advisory/ntap-20230420-0012/
https://www.mend.io/vulnerability-database/CVE-2023-27534

Severity Score

Weakness Type (CWE)

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE-22

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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