Crowd Data Center and Server update for jetty-server

1) HTTP request smuggling attack

EUVDB-ID: #VU13527

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-7656

CWE-ID: CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to conduct an HTTP request smuggling attack on the target system.

The vulnerability exists due to improper handling of HTTP/0.9 requests. A remote attacker can send a specially crafted HTTP/0.9 request that submits malicious request headers, cause the software and an upstream HTTP agent to misinterpret the boundary of the request and poison the web cache on the system, which could be used to conduct further attacks.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Crowd Data Center: 5.0 - 5.2.3

Crowd: 5.0 - 5.2.3

CPE2.3

• cpe:2.3:a:atlassian:crowd_data_center:5.0.10:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:crowd_data_center:5.1.8:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:crowd_data_center:5.2.3:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:crowd:5.0.10:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:crowd:5.1.8:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:crowd:5.2.3:*:*:*:*:*:*:*

External links

https://jira.atlassian.com/browse/CWD-6258

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.