CVE-2023-27534

Summary

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.

Affected Software

Weaknesses

• CWE-22: Path Traversal (CWE-22)

ADP Enrichment

CVE Program Container

Additional References

• https://hackerone.com/reports/1892351
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/
• https://security.netapp.com/advisory/ntap-20230420-0012/
• https://security.gentoo.org/glsa/202310-12
• https://lists.debian.org/debian-lts-announce/2024/03/msg00016.html

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: total

References

• https://hackerone.com/reports/1892351
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/
• https://security.netapp.com/advisory/ntap-20230420-0012/
• https://security.gentoo.org/glsa/202310-12
• https://lists.debian.org/debian-lts-announce/2024/03/msg00016.html

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