Vulnerability identifier: #VU21412

Vulnerability risk: Medium

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-16393

CWE-ID: CWE-113

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SPIP
Web applications / CMS

Vendor: spip.net

Description

The vulnerability allows a remote attacker to perform HTTP splitting attacks.

The vulnerability exists due to software does not corrector process CRLF character sequences in ecrire/inc/headers.php script. A remote attacker can send specially crafted request containing CRLF sequence and make the application send a split HTTP response.

Successful exploitation of the vulnerability may allow an attacker perform cache poisoning attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SPIP: 3.1.0 - 3.1.10, 3.2.0 - 3.2.4

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External links
http://blog.spip.net/Mise-a-jour-CRITIQUE-de-securite-Sortie-de-SPIP-3-2-5-et-SPIP-3-1-11.html
http://core.spip.net/issues/4362
http://git.spip.net/SPIP/spip/commit/0b832408b0aabd5b94a81e261e9413c0f31a19f1
http://seclists.org/bugtraq/2019/Sep/40
http://www.debian.org/security/2019/dsa-4532

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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.