Vulnerability identifier: #VU40406

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-3154

CWE-ID: CWE-94

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SPIP
Web applications / CMS

Vendor: spip.net

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

The encoder_contexte_ajax function in ecrire/inc/filtres.php in SPIP 2.x before 2.1.19, 3.0.x before 3.0.22, and 3.1.x before 3.1.1 allows remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via a crafted serialized object.

Mitigation
Install update from vendor's website.

Vulnerable software versions

SPIP: 2.0.0 - 2.0.22, 2.1.1 - 2.1.19, 3.0.0 - 3.0.20, 3.1.0

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External links
http://www.debian.org/security/2016/dsa-3518
http://blog.spip.net/Mise-a-jour-CRITIQUE-de-securite-Sortie-de-SPIP-3-1-1-SPIP-3-0-22-et-SPIP-2-1.html?lang=fr
http://core.spip.net/projects/spip/repository/revisions/22903

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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.