Headline
Zyxel Releases Urgent Security Updates for Critical Vulnerability in NAS Devices
Zyxel has rolled out security updates to address a critical security flaw in its network-attached storage (NAS) devices that could result in the execution of arbitrary commands on affected systems. Tracked as CVE-2023-27992 (CVSS score: 9.8), the issue has been described as a pre-authentication command injection vulnerability. "The pre-authentication command injection vulnerability in some Zyxel
Vulnerability / Data Security
Zyxel has rolled out security updates to address a critical security flaw in its network-attached storage (NAS) devices that could result in the execution of arbitrary commands on affected systems.
Tracked as CVE-2023-27992 (CVSS score: 9.8), the issue has been described as a pre-authentication command injection vulnerability.
“The pre-authentication command injection vulnerability in some Zyxel NAS devices could allow an unauthenticated attacker to execute some operating system (OS) commands remotely by sending a crafted HTTP request,” Zyxel said in an advisory published today.
Andrej Zaujec, NCSC-FI, and Maxim Suslov have been credited with discovering and reporting the flaw. The following versions are impacted by CVE-2023-27992 -
- NAS326 (V5.21(AAZF.13)C0 and earlier, patched in V5.21(AAZF.14)C0),
- NAS540 (V5.21(AATB.10)C0 and earlier, patched in V5.21(AATB.11)C0), and
- NAS542 (V5.21(ABAG.10)C0 and earlier, patched in V5.21(ABAG.11)C0)
The alert comes two weeks after the U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Monday added two flaws in Zyxel firewalls (CVE-2023-33009 and CVE-2023-33010) to its Known Exploited Vulnerabilities (KEV) catalog, based on evidence of active exploitation.
With Zyxel devices becoming an attack magnet for threat actors, it’s imperative that customers apply the fixes as soon as possible to prevent potential risks.
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Zyxel has released software updates to address two critical security flaws affecting select firewall and VPN products that could be abused by remote attackers to achieve code execution. Both the flaws – CVE-2023-33009 and CVE-2023-33010 – are buffer overflow vulnerabilities and are rated 9.8 out of 10 on the CVSS scoring system. A brief description of the two issues is below - CVE-2023-33009 -
Zyxel has released software updates to address two critical security flaws affecting select firewall and VPN products that could be abused by remote attackers to achieve code execution. Both the flaws – CVE-2023-33009 and CVE-2023-33010 – are buffer overflow vulnerabilities and are rated 9.8 out of 10 on the CVSS scoring system. A brief description of the two issues is below - CVE-2023-33009 -
A buffer overflow vulnerability in the ID processing function in Zyxel ATP series firmware versions 4.32 through 5.36 Patch 1, USG FLEX series firmware versions 4.50 through 5.36 Patch 1, USG FLEX 50(W) firmware versions 4.25 through 5.36 Patch 1, USG20(W)-VPN firmware versions 4.25 through 5.36 Patch 1, VPN series firmware versions 4.30 through 5.36 Patch 1, ZyWALL/USG series firmware versions 4.25 through 4.73 Patch 1, could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and even a remote code execution on an affected device.
A buffer overflow vulnerability in the ID processing function in Zyxel ATP series firmware versions 4.32 through 5.36 Patch 1, USG FLEX series firmware versions 4.50 through 5.36 Patch 1, USG FLEX 50(W) firmware versions 4.25 through 5.36 Patch 1, USG20(W)-VPN firmware versions 4.25 through 5.36 Patch 1, VPN series firmware versions 4.30 through 5.36 Patch 1, ZyWALL/USG series firmware versions 4.25 through 4.73 Patch 1, could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and even a remote code execution on an affected device.