#VU31168 Information disclosure in Pivotal Concourse - CVE-2019-3803

Vulnerability identifier: #VU31168

Vulnerability risk: Medium

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

CVE-ID: CVE-2019-3803

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Pivotal Concourse
Server applications / Application servers

Vendor: Pivotal

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

Pivotal Concourse, all versions prior to 4.2.2, puts the user access token in a url during the login flow. A remote attacker who gains access to a user's browser history could obtain the access token and use it to authenticate as the user.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Pivotal Concourse: 4.2.0 - 4.2.1

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External links
https://pivotal.io/security/cve-2019-3803

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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.