Host header injection in YouTrack



Published: 2021-11-08
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-43185
CWE-ID CWE-74
Exploitation vector Network
Public exploit N/A
Vulnerable software
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YouTrack
Web applications / CMS

Vendor JetBrains s.r.o.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Injection

EUVDB-ID: #VU58012

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-2021-43185

CWE-ID: CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to improper validation of HTTP headers. A remote attacker can inject arbitrary Host header and perform spoofing attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

YouTrack: 2017.1.30791 - 2021.3.22664

External links

http://blog.jetbrains.com/blog/2021/11/08/jetbrains-security-bulletin-q3-2021


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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