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ubuntuUbuntuUSN-5351-1
HistoryMar 28, 2022 - 12:00 a.m.

Paramiko vulnerability

2022-03-2800:00:00
ubuntu.com
78
paramiko
ubuntu
18.04 lts
20.04 lts
21.10
ssh2 library
private keys
permissions
vulnerability
jan schejbal
esm

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

5.9

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

6.2

Confidence

High

EPSS

0.003

Percentile

65.5%

Releases

  • Ubuntu 21.10
  • Ubuntu 20.04 LTS
  • Ubuntu 18.04 ESM

Packages

  • paramiko - Python SSH2 library

Details

Jan Schejbal discovered that Paramiko incorrectly handled permissions when
writing private key files. A local attacker could possibly use this issue
to gain access to private keys.

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

5.9

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

6.2

Confidence

High

EPSS

0.003

Percentile

65.5%