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Rewterz Threat Advisory – CVE-2021-41616 – Apache Vulnerability Zero-Day Actively Exploited In The Wild

October 6, 2021
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Rewterz Threat Alert – Hancitor InfoStealer – Active IOCs

October 6, 2021

Rewterz Threat Advisory – Multiple VMware vCenter Vulnerabilities

Severity

High

Analysis Summary

CVE-2021-38500 

Mozilla Firefox could allow a remote attacker to execute arbitrary code on the system, caused by memory safety bugs within the browser engine. By persuading a victim to visit a specially-crafted Web site, a remote attacker could exploit this vulnerability using unknown attack vectors to execute arbitrary code on the vulnerable system or cause a denial of service.

CVE-2021-38499 

Mozilla Firefox could allow a remote attacker to execute arbitrary code on the system, caused by memory safety bugs within the browser engine. By persuading a victim to visit a specially-crafted Web site, a remote attacker could exploit this vulnerability using unknown attack vectors to execute arbitrary code on the vulnerable system or cause a denial of service.

CVE-2021-38501 

Mozilla Firefox could allow a remote attacker to execute arbitrary code on the system, caused by memory safety bugs within the browser engine. By persuading a victim to visit a specially-crafted Web site, a remote attacker could exploit this vulnerability using unknown attack vectors to execute arbitrary code on the vulnerable system or cause a denial of service.

CVE-2021-38498 

Mozilla Firefox could allow a remote attacker to execute arbitrary code on the system, caused by a use-after-free of nsLanguageAtomService object. By persuading a victim to visit a specially-crafted Web site, a remote attacker could exploit this vulnerability using unknown attack vectors to execute arbitrary code on the vulnerable system or cause a denial of service.

CVE-2021-38497

Mozilla Firefox could allow a remote attacker to conduct spoofing attacks. By using reportValidity() and window.open(), a remote attacker could overlay a validation message on another origin and possibly conduct spoofing attacks.

CVE-2021-38496 

Mozilla Firefox could allow a remote attacker to execute arbitrary code on the system, caused by a use-after-free in MessageTask. By persuading a victim to visit a specially-crafted Web site, a remote attacker could exploit this vulnerability using unknown attack vectors to execute arbitrary code on the vulnerable system or cause a denial of service.

Impact

  • Code Execution
  • Unauthorized Access
  • Denial of Service

Affected Vendors

  • Mozilla

Affected Products

  • Mozilla Firefox ESR 78.14
  • Mozilla Firefox 92
  • Mozilla Firefox ESR 91.1

Remediation

Refer to Mozilla Advisory for patch, upgrade, or suggested workaround information.

https://www.mozilla.org/en-US/security/advisories/mfsa2021-43/

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