Ubuntu update for jinja2



Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2020-28493
CVE-2024-22195
CWE-ID CWE-185
CWE-79
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

python-jinja2 (Ubuntu package)
Operating systems & Components / Operating system package or component

python3-jinja2 (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Incorrect Regular Expression

EUVDB-ID: #VU50430

Risk: Medium

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

CVE-ID: CVE-2020-28493

CWE-ID: CWE-185 - Incorrect Regular Expression

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to incorrect subpattern applied to untrusted input. A remote attacker can pass specially crafted data to the application and perform a regular expression DoS (ReDOS) attack.

Mitigation

Update the affected package jinja2 to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 23.10

python-jinja2 (Ubuntu package): before 2.10.1-2ubuntu0.2

python3-jinja2 (Ubuntu package): before 2.10.1-2ubuntu0.2

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6599-1


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) Cross-site scripting

EUVDB-ID: #VU85368

Risk: Medium

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

CVE-ID: CVE-2024-22195

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data within the xmlattr filter. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Update the affected package jinja2 to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 23.10

python-jinja2 (Ubuntu package): before 2.10.1-2ubuntu0.2

python3-jinja2 (Ubuntu package): before 2.10.1-2ubuntu0.2

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6599-1


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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