Multiple vulnerabilities in Ruby on Rails



Published: 2021-02-11
Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE ID CVE-2021-22880
CVE-2021-22881
CWE ID CWE-185
CWE-601
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Ruby on Rails
Universal components / Libraries / Scripting languages

Vendor Rails

Security Advisory

1) Incorrect Regular Expression

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-22880

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 regular expression for money processing format in the PostgreSQL adapter. A remote attacker can pass specially crafted input to the application and perform a regular expression denial of service (ReDOS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Ruby on Rails: 5.0.0, 5.0.0 rc1, 5.0.0 rc2, 5.0.0.1, 5.0.0.beta1, 5.0.0.beta1.1, 5.0.0.beta2, 5.0.0.beta3, 5.0.0.beta4, 5.0.0.racecar1, 5.0.1, 5.0.1 rc1, 5.0.1 rc2, 5.0.2, 5.0.2 rc1, 5.0.3, 5.0.4, 5.0.4 rc1, 5.0.5, 5.0.5 rc1, 5.0.5 rc2, 5.0.6, 5.0.6 rc1, 5.0.7, 5.0.7.1, 5.0.7.2, 5.1.0, 5.1.0 rc1, 5.1.0 rc2, 5.1.0.beta1, 5.1.1, 5.1.2, 5.1.2 rc1, 5.1.3, 5.1.3 rc1, 5.1.3 rc2, 5.1.3 rc3, 5.1.4, 5.1.4 rc1, 5.1.5, 5.1.6, 5.1.6.1, 5.1.6.2, 5.1.7, 5.2.0, 5.2.1, 5.2.1 rc1, 5.2.1.1, 5.2.2, 5.2.2.1, 5.2.3, 5.2.4, 5.2.4.1, 5.2.4.2, 5.2.4.3, 5.2.4.4, 6.0.0, 6.0.1, 6.0.2, 6.0.2.1, 6.0.2.2, 6.0.3, 6.0.3.1, 6.0.3.2, 6.0.3.3, 6.0.3.4, 6.1.0, 6.1.1, 6.1.2

CPE External links

https://github.com/rails/rails/releases/tag/v6.1.2.1
https://github.com/rails/rails/releases/tag/v6.0.3.5
https://github.com/rails/rails/releases/tag/v5.2.4.5

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) Open redirect

Risk: Low

CVSSv3.1: 3 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-22881

CWE-ID: CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Exploit availability: No

Description

The vulnerability allows a remote attacker to redirect victims to arbitrary URL.

The vulnerability exists due to improper sanitization of user-supplied data, when the allowed host starts with a dot. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.

Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Ruby on Rails: 6.0.0, 6.0.1, 6.0.2, 6.0.2.1, 6.0.2.2, 6.0.3, 6.0.3.1, 6.0.3.2, 6.0.3.3, 6.0.3.4, 6.1.0, 6.1.1, 6.1.2

CPE External links

https://github.com/rails/rails/releases/tag/v6.1.2.1
https://github.com/rails/rails/releases/tag/v6.0.3.5

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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