• Home
  • Cyber Crime
  • Cyber warfare
  • APT
  • Data Breach
  • Deep Web
  • Digital ID
  • Hacking
  • Hacktivism
  • Intelligence
  • Internet of Things
  • Laws and regulations
  • Malware
  • Mobile
  • Reports
  • Security
  • Social Networks
  • Terrorism
  • ICS-SCADA
  • POLICIES
  • Contact me
MUST READ

Law enforcement operations seized BlackSuit ransomware gang’s darknet sites

 | 

Arizona woman sentenced for aiding North Korea in U.S. IT job fraud scheme

 | 

Operation CargoTalon targets Russia’s aerospace with EAGLET malware,

 | 

Unpatched flaw in EoL LG LNV5110R cameras lets hackers gain Admin access

 | 

Koske, a new AI-Generated Linux malware appears in the threat landscape

 | 

Mitel patches critical MiVoice MX-ONE Auth bypass flaw

 | 

Coyote malware is first-ever malware abusing Windows UI Automation

 | 

SonicWall fixed critical flaw in SMA 100 devices exploited in Overstep malware attacks

 | 

DSPM & AI Are Booming: $17.87B and $4.8T Markets by 2033

 | 

Stealth backdoor found in WordPress mu-Plugins folder

 | 

U.S. CISA adds CrushFTP, Google Chromium, and SysAid flaws to its Known Exploited Vulnerabilities catalog

 | 

U.S. CISA urges FCEB agencies to fix two Microsoft SharePoint flaws immediately and added them to its Known Exploited Vulnerabilities catalog

 | 

Sophos fixed two critical Sophos Firewall vulnerabilities

 | 

French Authorities confirm XSS.is admin arrested in Ukraine

 | 

Microsoft linked attacks on SharePoint flaws to China-nexus actors

 | 

Cisco confirms active exploitation of ISE and ISE-PIC flaws

 | 

SharePoint under fire: new ToolShell attacks target enterprises

 | 

CrushFTP zero-day actively exploited at least since July 18

 | 

Hardcoded credentials found in HPE Aruba Instant On Wi-Fi devices

 | 

MuddyWater deploys new DCHSpy variants amid Iran-Israel conflict

 | 
  • Home
  • Cyber Crime
  • Cyber warfare
  • APT
  • Data Breach
  • Deep Web
  • Digital ID
  • Hacking
  • Hacktivism
  • Intelligence
  • Internet of Things
  • Laws and regulations
  • Malware
  • Mobile
  • Reports
  • Security
  • Social Networks
  • Terrorism
  • ICS-SCADA
  • POLICIES
  • Contact me
  • Home
  • Breaking News
  • Hacking
  • Security
  • Apache Log4j 2.17.1 fixes new remote code execution flaw (CVE-2021-44832)

Apache Log4j 2.17.1 fixes new remote code execution flaw (CVE-2021-44832)

Pierluigi Paganini December 29, 2021

The Apache Software Foundation released Log4j 2.17.1 version to address recently discovered arbitrary code execution flaw tracked as CVE-2021-44832.

The Apache Software Foundation released Log4j 2.17.1 version to address a recently discovered arbitrary code execution flaw, tracked as CVE-2021-44832, affecting Log4j 2.17.0.

CVE-2021-44832 is the fifth vulnerability discovered in the popular library in the last weeks. Like the previous issues affecting the library, this one could be exploited by threat actors to execute malicious code on affected systems.

“Apache Log4j2 versions 2.0-beta7 through 2.17.0 (excluding security fix releases 2.3.2 and 2.12.4) are vulnerable to a remote code execution (RCE) attack where an attacker with permission to modify the logging configuration file can construct a malicious configuration using a JDBC Appender with a data source referencing a JNDI URI which can execute remote code. This issue is fixed by limiting JNDI data source names to the java protocol in Log4j2 versions 2.17.1, 2.12.4, and 2.3.2.” reads the advisory.

The flaw received a CVSS score of 6.6 and impacts all log4j versions from 2.0-alpha7 to 2.17.0. Versions 2.3.2 and 2.12.4. are not impacted.

The vulnerability was discovered by Checkmarx security researcher Yaniv Nizry who reported it to Apache on December 27.

Stay tuned for a blogpost 😉 pic.twitter.com/D56WpVsuF3

— Yaniv Nizry (@YNizry) December 28, 2021

Nizry also published details of the CVE-2021-44832 flaw in a blog post, he speculates that the exploitation of this issue is more complex than the CVE-2021-44228 one.

“This vulnerability doesn’t use the disabled lookup feature. The complexity of this vulnerability is higher than the original CVE-2021-44228 since it requires the attacker to have control over the configuration,” states Nizry. “Unlike Logback, in Log4j there is a feature to load a remote configuration file or to configure the logger through the code, so an arbitrary code execution could be achieved with [an] MitM attack, user input ending up in a vulnerable configuration variable, or modifying the config file.”

The previous vulnerabilities discovered in the Log4J library are:

  • CVE-2021-44228 (CVSS score: 10.0) – A remote code execution vulnerability affecting Log4j versions from 2.0-beta9 to 2.14.1
  • CVE-2021-45046 (CVSS score: 9.0) – An information leak and remote code execution vulnerability affecting Log4j versions from 2.0-beta9 to 2.15.0, excluding 2.12.2
  • CVE-2021-45105 (CVSS score: 7.5) – A denial-of-service (DoS) vulnerability affecting Log4j versions from 2.0-beta9 to 2.16.0
  • CVE-2021-4104 (CVSS score: 8.1) – An untrusted deserialization vulnerability affecting Log4j version 1.2

Follow me on Twitter: @securityaffairs and Facebook

[adrotate banner=”9″][adrotate banner=”12″]

Pierluigi Paganini

(SecurityAffairs – hacking, log4j)

[adrotate banner=”5″]

[adrotate banner=”13″]


facebook linkedin twitter

Apache CVE-2021-44832 Hacking hacking news information security news IT Information Security Log4j Pierluigi Paganini Security Affairs Security News

you might also like

Pierluigi Paganini July 26, 2025
Law enforcement operations seized BlackSuit ransomware gang’s darknet sites
Read more
Pierluigi Paganini July 26, 2025
Arizona woman sentenced for aiding North Korea in U.S. IT job fraud scheme
Read more

leave a comment

newsletter

Subscribe to my email list and stay
up-to-date!

    recent articles

    Law enforcement operations seized BlackSuit ransomware gang’s darknet sites

    Cyber Crime / July 26, 2025

    Arizona woman sentenced for aiding North Korea in U.S. IT job fraud scheme

    Intelligence / July 26, 2025

    Operation CargoTalon targets Russia’s aerospace with EAGLET malware,

    Intelligence / July 25, 2025

    Unpatched flaw in EoL LG LNV5110R cameras lets hackers gain Admin access

    Security / July 25, 2025

    Koske, a new AI-Generated Linux malware appears in the threat landscape

    Malware / July 25, 2025

    To contact me write an email to:

    Pierluigi Paganini :
    pierluigi.paganini@securityaffairs.co

    LEARN MORE

    QUICK LINKS

    • Home
    • Cyber Crime
    • Cyber warfare
    • APT
    • Data Breach
    • Deep Web
    • Digital ID
    • Hacking
    • Hacktivism
    • Intelligence
    • Internet of Things
    • Laws and regulations
    • Malware
    • Mobile
    • Reports
    • Security
    • Social Networks
    • Terrorism
    • ICS-SCADA
    • POLICIES
    • Contact me

    Copyright@securityaffairs 2024

    We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept All”, you consent to the use of ALL the cookies. However, you may visit "Cookie Settings" to provide a controlled consent.
    Cookie SettingsAccept All
    Manage consent

    Privacy Overview

    This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities...
    Necessary
    Always Enabled
    Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
    Non-necessary
    Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.
    SAVE & ACCEPT