CVEvulnerability
CVE-2020-12062
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2020-06-01
- Last modified
- 2026-10-14
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:P/A:N
- Weaknesses
- CWE-20
Description
The scp client in OpenSSH 8.2 incorrectly sends duplicate responses to the server upon a utimes system call failure, which allows a malicious unprivileged user on the remote server to overwrite arbitrary files in the client's download directory by creating a crafted subdirectory anywhere on the remote server. The victim must use the command scp -rp to download a file hierarchy containing, anywhere inside, this crafted subdirectory. NOTE: the vendor points out that "this attack can achieve no more than a hostile peer is already able to achieve within the scp protocol" and "utimes does not fail under normal circumstances.
Affected configurations
• openbsd openssh 8.2
Related
Weakness · CWE (1)
- CWE-20 Improper Input Validation weakness
References
- https://github.com/openssh/openssh-portable/commit/955854cafca88e0cdcd3d09ca1ad4ada465364a1 Patch, Third Party Advisory
- https://github.com/openssh/openssh-portable/commit/aad87b88fc2536b1ea023213729aaf4eaabe1894 Third Party Advisory
- https://www.openssh.com/txt/release-8.3 Release Notes, Vendor Advisory
- https://www.openwall.com/lists/oss-security/2020/05/27/1 Mailing List, Release Notes, Third Party Advisory
- https://github.com/openssh/openssh-portable/commit/955854cafca88e0cdcd3d09ca1ad4ada465364a1 Patch, Third Party Advisory
- https://github.com/openssh/openssh-portable/commit/aad87b88fc2536b1ea023213729aaf4eaabe1894 Third Party Advisory
- https://www.openssh.com/txt/release-8.3 Release Notes, Vendor Advisory
- https://www.openwall.com/lists/oss-security/2020/05/27/1 Mailing List, Release Notes, Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html cert-portal.siemens.com