#VU26418 Deserialization of Untrusted Data in Logback - CVE-2017-5929

Vulnerability identifier: #VU26418

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2017-5929

CWE-ID: CWE-502

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Logback
Server applications / Other server solutions

Vendor: QOS.ch

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data within SocketServer and ServerSocketReceiver components in Logback. A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Logback: 1.0.0 - 1.1.11

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External links
https://access.redhat.com/errata/RHSA-2017:1675
https://access.redhat.com/errata/RHSA-2017:1676
https://access.redhat.com/errata/RHSA-2017:1832
https://access.redhat.com/errata/RHSA-2018:2927
https://logback.qos.ch/news.html

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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.