Denial of service in Ruby on Rails



Published: 2021-05-10
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-22902
CWE-ID CWE-416
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Ruby on Rails
Universal components / Libraries / Scripting languages

Vendor Rails

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Use-after-free

EUVDB-ID: #VU53002

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]

CVE-ID: CVE-2021-22902

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error in the Action Dispatch. A remote attacker can send specially crafted Accept headers and cause a denial of service condition on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Ruby on Rails: 6.0.0 - 6.1.3.2

External links

http://seclists.org/oss-sec/2021/q2/99


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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