CVE-2020-12062

** DISPUTED ** 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."

CVSS v3 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:P/A:N

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
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

Configurations

Configuration 1 (hide)

cpe:2.3:a:openbsd:openssh:8.2:*:*:*:*:*:*:*

History

No history.

Information

Published : 2020-06-01 16:15

Updated : 2024-05-17 01:41

NVD link : CVE-2020-12062

Mitre link : CVE-2020-12062

CVE.ORG link : CVE-2020-12062

JSON object : View

Products Affected

openbsd

openssh

CWE

CWE-20

Improper Input Validation

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