Ubuntu update for python2.7



Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2021-3426
CVE-2021-4189
CVE-2022-0391
CWE-ID CWE-20
CWE-918
CWE-93
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

python3.8 (Ubuntu package)
Operating systems & Components / Operating system package or component

python3.8-minimal (Ubuntu package)
Operating systems & Components / Operating system package or component

python3.6-minimal (Ubuntu package)
Operating systems & Components / Operating system package or component

python3.6 (Ubuntu package)
Operating systems & Components / Operating system package or component

python2.7-minimal (Ubuntu package)
Operating systems & Components / Operating system package or component

python2.7 (Ubuntu package)
Operating systems & Components / Operating system package or component

python3.5-minimal (Ubuntu package)
Operating systems & Components / Operating system package or component

python3.5 (Ubuntu package)
Operating systems & Components / Operating system package or component

python3.4 (Ubuntu package)
Operating systems & Components / Operating system package or component

python3.4-minimal (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Improper input validation

EUVDB-ID: #VU60098

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-3426

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote authenticated user to gain access to sensitive information.

The vulnerability exists due to improper input validation within the Binding Support Function (Python) component in Oracle Communications Cloud Native Core Binding Support Function. A remote authenticated user can exploit this vulnerability to gain access to sensitive information.

Mitigation

Update the affected package python2.7 to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 20.04

python3.8 (Ubuntu package): before 3.8.10-0ubuntu1~20.04.4

python3.8-minimal (Ubuntu package): before 3.8.10-0ubuntu1~20.04.4

python3.6-minimal (Ubuntu package): before 3.6.9-1~18.04ubuntu1.7

python3.6 (Ubuntu package): before 3.6.9-1~18.04ubuntu1.7

python2.7-minimal (Ubuntu package): before 2.7.17-1~18.04ubuntu1.7

python2.7 (Ubuntu package): before 2.7.17-1~18.04ubuntu1.7

python3.5-minimal (Ubuntu package): before 3.5.2-2ubuntu0~16.04.13

python3.5 (Ubuntu package): before 3.5.2-2ubuntu0~16.04.13

python3.4 (Ubuntu package): before 3.4.3

python3.4-minimal (Ubuntu package): before 3.4.3-1ubuntu1~14.04.7

CPE2.3 External links

https://ubuntu.com/security/notices/USN-5342-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Server-Side Request Forgery (SSRF)

EUVDB-ID: #VU61681

Risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-4189

CWE-ID: CWE-918 - Server-Side Request Forgery (SSRF)

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform SSRF attacks.

The vulnerability exists due to insufficient validation of user-supplied input in the FTP (File Transfer Protocol) client library when using it in PASV (passive) mode. A remote attacker can set up a malicious FTP server, trick the FTP client in Python into connecting back to a given IP address and port, which can lead to FTP client scanning ports which otherwise would not have been possible.

Mitigation

Update the affected package python2.7 to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 20.04

python3.8 (Ubuntu package): before 3.8.10-0ubuntu1~20.04.4

python3.8-minimal (Ubuntu package): before 3.8.10-0ubuntu1~20.04.4

python3.6-minimal (Ubuntu package): before 3.6.9-1~18.04ubuntu1.7

python3.6 (Ubuntu package): before 3.6.9-1~18.04ubuntu1.7

python2.7-minimal (Ubuntu package): before 2.7.17-1~18.04ubuntu1.7

python2.7 (Ubuntu package): before 2.7.17-1~18.04ubuntu1.7

python3.5-minimal (Ubuntu package): before 3.5.2-2ubuntu0~16.04.13

python3.5 (Ubuntu package): before 3.5.2-2ubuntu0~16.04.13

python3.4 (Ubuntu package): before 3.4.3

python3.4-minimal (Ubuntu package): before 3.4.3-1ubuntu1~14.04.7

CPE2.3 External links

https://ubuntu.com/security/notices/USN-5342-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) CRLF injection

EUVDB-ID: #VU61675

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-0391

CWE-ID: CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to inject arbitrary data in server response.

The vulnerability exists due to insufficient validation of attacker-supplied data within the urllib.parse module in Python. A remote attacker can pass specially crafted data to the application containing CR-LF characters and modify application behavior.

Mitigation

Update the affected package python2.7 to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 20.04

python3.8 (Ubuntu package): before 3.8.10-0ubuntu1~20.04.4

python3.8-minimal (Ubuntu package): before 3.8.10-0ubuntu1~20.04.4

python3.6-minimal (Ubuntu package): before 3.6.9-1~18.04ubuntu1.7

python3.6 (Ubuntu package): before 3.6.9-1~18.04ubuntu1.7

python2.7-minimal (Ubuntu package): before 2.7.17-1~18.04ubuntu1.7

python2.7 (Ubuntu package): before 2.7.17-1~18.04ubuntu1.7

python3.5-minimal (Ubuntu package): before 3.5.2-2ubuntu0~16.04.13

python3.5 (Ubuntu package): before 3.5.2-2ubuntu0~16.04.13

python3.4 (Ubuntu package): before 3.4.3

python3.4-minimal (Ubuntu package): before 3.4.3-1ubuntu1~14.04.7

CPE2.3 External links

https://ubuntu.com/security/notices/USN-5342-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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