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ubuntucveUbuntu.comUB:CVE-2018-20685
HistoryJan 10, 2019 - 12:00 a.m.

CVE-2018-20685

2019-01-1000:00:00
ubuntu.com
ubuntu.com
26

CVSS2

2.6

Attack Vector

NETWORK

Attack Complexity

HIGH

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:H/Au:N/C:N/I:P/A:N

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

EPSS

0.004

Percentile

73.2%

JSON

In OpenSSH 7.9, scp.c in the scp client allows remote SSH servers to bypass
intended access restrictions via the filename of . or an empty filename.
The impact is modifying the permissions of the target directory on the
client side.

Bugs

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 The recommended workaround for this issue is to switch to using sftp instead of scp.
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchopenssh< 1:7.6p1-4ubuntu0.2UNKNOWN
ubuntu18.10noarchopenssh< 1:7.7p1-4ubuntu0.2UNKNOWN
ubuntu19.04noarchopenssh< 1:7.9p1-5UNKNOWN
ubuntu19.10noarchopenssh< 1:7.9p1-5UNKNOWN
ubuntu20.04noarchopenssh< 1:7.9p1-5UNKNOWN
ubuntu20.10noarchopenssh< 1:7.9p1-5UNKNOWN
ubuntu21.04noarchopenssh< 1:7.9p1-5UNKNOWN
ubuntu21.10noarchopenssh< 1:7.9p1-5UNKNOWN
ubuntu22.04noarchopenssh< 1:7.9p1-5UNKNOWN
ubuntu22.10noarchopenssh< 1:7.9p1-5UNKNOWN
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1-10 of 191

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CVSS2

2.6

Attack Vector

NETWORK

Attack Complexity

HIGH

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:H/Au:N/C:N/I:P/A:N

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

EPSS

0.004

Percentile

73.2%

JSON
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