VDB-99929 · CVE-2017-5645 · BID 97702

Apache Log4j up to 2.8.1 Socket Server deserialization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.4$0-$5k0.00

A vulnerability, which was classified as critical, has been found in Apache Log4j up to 2.8.1. This issue affects an unknown code of the component Socket Server. The manipulation with an unknown input leads to a deserialization vulnerability. Using CWE to declare the problem leads to CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In Apache Log4j 2.x before 2.8.2, when using the TCP socket server or UDP socket server to receive serialized log events from another application, a specially crafted binary payload can be sent that, when deserialized, can execute arbitrary code.

The bug was discovered 04/02/2017. The weakness was shared 04/17/2017 by Marcio Almeida (Website). The advisory is shared at issues.apache.org. The identification of this vulnerability is CVE-2017-5645 since 01/29/2017. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 15 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 99988 (Fedora 24 : log4j (2017-2ccfbd650a)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 87333 (Oracle WebLogic Server Multiple Vulnerabilities (CPUAPR2018)).

Upgrading to version 2.8.2 eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (99988). The entries 92314, 92773, 92782 and 92786 are related to this item.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 99988
Nessus Name: Fedora 24 : log4j (2017-2ccfbd650a)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for log4j FEDORA-2017-511ebfa8a3
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Log4j 2.8.2

Timelineinfo

01/29/2017 🔍
04/02/2017 +63 days 🔍
04/17/2017 +15 days 🔍
04/17/2017 +0 days 🔍
04/17/2017 +0 days 🔍
04/18/2017 +1 days 🔍
05/04/2017 +16 days 🔍
05/05/2017 +1 days 🔍
11/29/2022 +2034 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: FEDORA-2017-2ccfbd650a
Researcher: Marcio Almeida
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-5645 (🔍)
SecurityTracker: 1040200
SecurityFocus: 97702 - Apache Log4j CVE-2017-5645 Remote Code Execution Vulnerability

See also: 🔍

Entryinfo

Created: 04/18/2017 10:36
Updated: 11/29/2022 14:55
Changes: 04/18/2017 10:36 (76), 10/19/2019 11:19 (6), 11/29/2022 14:51 (5), 11/29/2022 14:55 (1)
Complete: 🔍

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