Improper Check for Unusual or Exceptional Conditions in ZyXEL Communications Corp. products - CVE-2022-43393

Vulnerability identifier: #VU71424

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2022-43393

CWE-ID: CWE-754

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper error handling in the HTTP request processing function. A remote attacker can send specially crafted data to the application and perform a denial of service (DoS) attack.

MGS3530-28
MGS3500-24S
MGS3520-28
MGS3520-28F
XMG1930-30
XMG1930-30HP
XGS2210-28
XGS2210-52
XGS2210-28HP
XGS2210-52HP
GS1915-8
GS1915-8EP
GS1915-24E
GS1915-24EP
XGS4600-32
XGS4600-32F
XGS1930-28HP
XGS1930-28
XGS1930-52
XGS1930-52HP
XGS4600-52F
GS1350-6HP
GS1350-12HP
GS1350-18HP
GS1350-26HP
XS1930-10
XS1930-12HP
GS2220-10
GS2220-10HP
GS2220-28
GS2220-28HP
GS2220-50
GS2220-50HP
XS1930-12F
GS1920-24v2
GS1920-24HPv2
GS1920-48v2
GS1920-48HPv2
XS3800-28
XGS2220-30
XGS2220-30HP
XGS2220-54
XGS2220-54HP
XGS2220-30F
XGS2220-54FP

Install updates from vendor's website.

MGS3530-28 - addressed in versions 4.10(ACFJ.1)C0, 4.10(ACEM.2)C0
MGS3500-24S - update to 4.10(ABBR.2)C0
MGS3520-28 - addressed in versions 4.10(ABQM.2)C0, 4.10(AATN.5)C0
MGS3520-28F - update to 4.10(AATM.4)C0
XMG1930-30 - update to 4.80(ACAR.0)
XMG1930-30HP - update to 4.80(ACAS.0)
XGS2210-28 - update to 4.70(AAZJ.2)C0
XGS2210-52 - update to 4.70(AAZK.2)C0
XGS2210-28HP - update to 4.70(AAZL.2)C0
XGS2210-52HP - update to 4.70(AAZM.2)C0
GS1915-8 - update to 4.70(ACAP.3)C0
GS1915-8EP - update to 4.70(ACAQ.3)C0
GS1915-24E - update to 4.70(ACDR.3)C0
GS1915-24EP - update to 4.70(ACDS.3)C0
XGS4600-32 - update to 4.70(ABBH.4)C0
XGS4600-32F - update to 4.70(ABBI.4)C0
XGS1930-28HP - update to 4.70(ABHS.5)C0
XGS1930-28 - update to 4.70(ABHT.5)C0
XGS1930-52 - update to 4.70(ABHU.5)C0
XGS1930-52HP - update to 4.70(ABHV.5)C0
XGS4600-52F - update to 4.70(ABIK.4)C0
GS1350-6HP - update to 4.70(ABPI.5)C0
GS1350-12HP - update to 4.70(ABPJ.5)C0
GS1350-18HP - update to 4.70(ABPK.5)C0
GS1350-26HP - update to 4.70(ABPL.5)C0
XS1930-10 - update to 4.80(ABQE.0)C0
XS1930-12HP - update to 4.80(ABQF.0)C0
GS2220-10 - update to 4.70(ABRO.6)C0
GS2220-10HP - update to 4.70(ABRP.6)C0
GS2220-28 - update to 4.70(ABRQ.6)C0
GS2220-28HP - update to 4.70(ABRR.6)C0
GS2220-50 - update to 4.70(ABRS.6)C0
GS2220-50HP - update to 4.70(ABRT.6)C0
XS1930-12F - update to 4.80(ABZV.0)C0
GS1920-24v2 - update to 4.70(ABMH.8)C0
GS1920-24HPv2 - update to 4.70(ABMI.8)C0
GS1920-48v2 - update to 4.70(ABMJ.8)C0
GS1920-48HPv2 - update to 4.70(ABMK.8)C0
XS3800-28 - update to 4.80(ABML.1)C0
XGS2220-30 - update to 4.80(ABXN.1)C0
XGS2220-30HP - update to 4.80(ABXO.1)C0
XGS2220-54 - update to 4.80(ABXP.1)C0
XGS2220-54HP - update to 4.80(ABXQ.1)C0
XGS2220-30F - update to 4.80(ABYE.1)C0
XGS2220-54FP - update to 4.80(ACCE.1)C0

• https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-dos-vulnerability-of-switches

• Denial of service in Zyxel switches