Ubuntu.comUB:CVE-2020-12062CVE-2020-12062
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
0.001 Low
EPSS
Percentile
45.9%
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.”
Notes
| Author | Note |
|---|---|
| seth-arnold | openssh-ssh1 is provided for compatibility with old devices that cannot be upgraded to modern protocols. Thus we may not provide security support for this package if doing so would prevent access to equipment. |
| mdeslaur | this issue has been disputed as being a security issue, we will not be fixing this issue in Ubuntu. |
Related
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
0.001 Low
EPSS
Percentile
45.9%