Fedora 25 update for log4j

1) Deserialization of untrusted data

EUVDB-ID: #VU12127

Risk: High

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

CVE-ID: CVE-2017-5645

CWE-ID: CWE-502 - Deserialization of Untrusted Data

Exploit availability: No

Description

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

The weakness exists receiving serialized log events from another application when using the TCP socket server or UDP socket server. A remote attacker can submit a specially crafted binary payload, when deserialized, and execute arbitrary code.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 25

log4j: before 2.5-5.fc25

CPE2.3

• cpe:2.3:o:fedoraproject:fedora:25:*:*:*:*:*:*:*
• cpe:2.3:a:fedoraproject:log4j:*:*:*:*:*:fedora:*:*

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2017-511ebfa8a3

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.