CVE-2020-12062

published 2020-06-01

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…

Priority P3 47 high 7.5 CVSS 3.1

AV N AC L PR N UI N S U C N I H A N

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

7 ranges

Vendor	Product	Version range	Fixed in
debian	openssh	< openssh 1:8.3p1-1 (bookworm)	openssh 1:8.3p1-1 (bookworm)
openbsd	openssh	—	—
openbsd	openssh	>= 0 < 1:8.3p1-1	1:8.3p1-1
openbsd	openssh	>= 0 < 1:8.3p1-1	1:8.3p1-1
openbsd	openssh	>= 0 < 1:8.3p1-1	1:8.3p1-1
openbsd	openssh	>= 0 < 1:8.3p1-1	1:8.3p1-1
paloalto	prisma_sd	—	—

CVSS provenance

nvd v3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

nvd v2.0 5.0 MEDIUM AV:N/AC:L/Au:N/C:N/I:P/A:N

osv 7.5 HIGH

vendor_debian 7.5 LOW

vendor_redhat 7.5 HIGH

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CWE-20