Ubuntu update for python-django

1) HTTP response splitting

EUVDB-ID: #VU52942

Risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-32052

CWE-ID: CWE-113 - Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform HTTP splitting attacks.

The vulnerability exists due to software does not correctly processes CRLF character sequences in URLValidator. A remote attacker can send specially crafted request containing CRLF sequence and make the application to send a split HTTP response.

Successful exploitation of the vulnerability may allow an attacker perform cache poisoning attack.

Note, the vulnerability affects Django installations on Python 3.9.5+.

Mitigation

Update the affected package python-django to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 21.04

python3-django (Ubuntu package): before 2:2.2.20-1ubuntu0.2

python-django (Ubuntu package): before 1:1.11.11-1ubuntu1.14

External links

http://ubuntu.com/security/notices/USN-4975-1

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.

2) Path traversal

EUVDB-ID: #VU53741

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-33203

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences within the "admindocs" view. A remote authenticated attacker can send a specially crafted HTTP request and read arbitrary files on the system.

Mitigation

Update the affected package python-django to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 21.04

python3-django (Ubuntu package): before 2:2.2.20-1ubuntu0.2

python-django (Ubuntu package): before 1:1.11.11-1ubuntu1.14

External links

http://ubuntu.com/security/notices/USN-4975-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

3) Server-Side Request Forgery (SSRF)

EUVDB-ID: #VU53742

Risk: Medium

CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-33571

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 "URLValidator", "validate_ipv4_address()" and "validate_ipv46_address()" . A remote attacker can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.

Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.

Mitigation

Update the affected package python-django to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 21.04

python3-django (Ubuntu package): before 2:2.2.20-1ubuntu0.2

python-django (Ubuntu package): before 1:1.11.11-1ubuntu1.14

External links

http://ubuntu.com/security/notices/USN-4975-1

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.