CVE-2020-12062
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.
- Score
- CVSS 3.1 7.5 High
- Status
- Modified - cve@mitre.org
- Published
- 2020-06-01
- Last modified
- 2026-10-14
- Weaknesses
- CWE-20
Affected products
- Openssh (Openbsd)
- Simatic S7-1500 Cpu 1518-4 Pndp Mfp (Siemens)
- Simatic S7-1500 Cpu 1518f-4 Pndp Mfp (Siemens)
- Siplus S7-1500 Cpu 1518-4 Pndp Mfp (Siemens)
References
- https://www.openwall.com/lists/oss-security/2020/05/27/1
- https://www.openssh.com/txt/release-8.3
- https://github.com/openssh/openssh-portable/commit/955854cafca88e0cdcd3d09ca1ad4ada465364a1
- https://github.com/openssh/openssh-portable/commit/aad87b88fc2536b1ea023213729aaf4eaabe1894
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
