The many vulnerabilities Talos discovered in SOHO and industrial wireless routers post-VPNFilter

Since the discovery of the widespread VPNFilter malware in 2018, Cisco Talos researchers have been researching vulnerabilities in small and home office SOHO and industrial routers. During that research, Talos has worked with vendors to report and mitigate these vulnerabilities, totaling 141...

Memory corruption vulnerability in Microsoft Edge; MilesightVPN and router could be taken over

Since the beginning of July, Cisco Talos has published 40 vulnerability advisories affecting a range of software and hardware, including the Microsoft Edge browser. In our new series called "Vulnerability Roundup," well be recapping the vulnerabilities we recently disclosed to provide readers wit...

Implementing an ISO-compliant threat intelligence program

Implementing a threat intelligence program that meets the definition of threat intelligence control as described in ISO/IEC 27002:2022 -- a set of standards set forth by the International Organization for Standardization -- is not onerous. The ISO/IEC 27002 standard describes a non-exhaustive lis...

Malicious campaigns target government, military and civilian entities in Ukraine, Poland

Cisco Talos has discovered a threat actor conducting several campaigns against government entities, military organizations and civilian users in Ukraine and Poland. We judge that these operations are very likely aimed at stealing information and gaining persistent remote access. The activity we...

Apple DCERPC packet stats buffer overflow vulnerability

Talos Vulnerability Report TALOS-2022-1660 Apple DCERPC packet stats buffer overflow vulnerability July 13, 2023 CVE Number CVE-2023-23513 SUMMARY A buffer overflow vulnerability exists in the stats logging functionality of DCERPC library as used in Apple macOS 12.6.1 A specially-crafted network...

VMware DCERPC call request uninitialized memory heap overflow vulnerability

Talos Vulnerability Report TALOS-2023-1801 VMware DCERPC call request uninitialized memory heap overflow vulnerability July 13, 2023 CVE Number CVE-2023-20892 SUMMARY A heap overflow vulnerability exists in the request processing functionality of DCERPC library as used in VMware vCenter Server...

Apple DCERPC allocation hint uninitialized memory disclosure vulnerability

Talos Vulnerability Report TALOS-2022-1675 Apple DCERPC allocation hint uninitialized memory disclosure vulnerability July 13, 2023 CVE Number None SUMMARY An information disclosure vulnerability exists in the call fault reporting functionality of DCERPC library as used in Apple macOS 12.6.1 that...

Apple DCERPC presentation result list out of bounds memory access

Talos Vulnerability Report TALOS-2022-1659 Apple DCERPC presentation result list out of bounds memory access July 13, 2023 CVE Number CVE-2023-23539 SUMMARY An out of bounds memory access vulnerability exists in the processing of packets containing presentation result lists in DCERPC library as...

VMWare vCenter Server DCERPC presentation result list out of bounds memory access

Talos Vulnerability Report TALOS-2023-1800 VMWare vCenter Server DCERPC presentation result list out of bounds memory access July 13, 2023 CVE Number CVE-2023-20896 SUMMARY An out of bounds memory access vulnerability exists in the processing of packets containing presentation result lists in...

Undocumented driver-based browser hijacker RedDriver targets Chinese speakers and internet cafes

Cisco Talos has identified multiple versions of an undocumented malicious driver named "RedDriver," a driver-based browser hijacker that uses the Windows Filtering Platform WFP to intercept browser traffic. RedDriver has been active since at least 2021. RedDriver utilizes HookSignTool to forge it...

Old certificate, new signature: Open-source tools forge signature timestamps on Windows drivers

Cisco Talos has observed threat actors taking advantage of a Windows policy loophole that allows the signing and loading of cross-signed kernel mode drivers with signature timestamp prior to July 29, 2015. Actors are leveraging multiple open-source tools that alter the signing date of kernel mode...

Hackers Exploit Windows Policy Loophole to Forge Kernel-Mode Driver Signatures

A Microsoft Windows policy loophole has been observed being exploited primarily by native Chinese-speaking threat actors to forge signatures on kernel-mode drivers. "Actors are leveraging multiple open-source tools that alter the signing date of kernel mode drivers to load malicious and unverifie...

Threat Roundup for June 30 to July 7

Today, Talos is publishing a glimpse into the most prevalent threats weve observed between June 30 and July 7. As with previous roundups, this post isnt meant to be an in-depth analysis. Instead, this post will summarize the threats weve observed by highlighting key behavioral characteristics,...

Taking over Milesight UR32L routers behind a VPN: 22 vulnerabilities and a full chain

Cisco Talos discovered 17 vulnerabilities 63 CVEs in the Milesight UR32L router and five vulnerabilities six CVEs in the Milesight MilesightVPN remote access solution software. An attacker could exploit the vulnerabilities discovered to completely compromise the UR32L and MilesightVPN. This post...

Milesight UR32L urvpn_client Certificate Validation vulnerability

Talos Vulnerability Report TALOS-2023-1705 Milesight UR32L urvpnclient Certificate Validation vulnerability July 6, 2023 CVE Number CVE-2023-23546 SUMMARY A misconfiguration vulnerability exists in the urvpnclient functionality of Milesight UR32L v32.3.0.5. A specially-crafted man-in-the-middle...

Milesight MilesightVPN requestHandlers.js verifyToken authentication bypass vulnerability

Talos Vulnerability Report TALOS-2023-1700 Milesight MilesightVPN requestHandlers.js verifyToken authentication bypass vulnerability July 6, 2023 CVE Number CVE-2023-22844 SUMMARY An authentication bypass vulnerability exists in the requestHandlers.js verifyToken functionality of Milesight VPN...

doRebalance in Talos is vulnerable to Flash loan Attacks resulting loss of funds

Lines of code Vulnerability details Impact Loss of funds due to MEV Sandwich attacks. Proof of Concept Rebalancing is done using doRebalance method in TalosStrategySimple. File: TalosStrategySimple.sol function doRebalance internal override returns uint256 amount0, uint256 amount1 int24...

New video provides a behind-the-scenes look at Talos ransomware hunters

Welcome to this weeks edition of the Threat Source newsletter. AI-generated art is causing drama across the internet over the past few months, from Marvel TV show opening credits scenes to predatory YouTubers who claim YOU can make millions by having AI tools create childrens books for you. There...

Vulnerability Spotlight: Use-after-free condition in Google Chrome WebGL

Cisco Talos recently discovered an exploitable use-after-free vulnerability in Google Chromes Web Graphics Library WebGL. Google Chrome is a cross-platform web browser -- and Chromium is the open-source version of the browser that both Google and other software developers use as the basis to buil...

chromium -- multiple vulnerabilities

Chrome Releases reports: This update includes 4 security fixes: 1452137 High CVE-2023-3420: Type Confusion in V8. Reported by Man Yue Mo of GitHub Security Lab on 2023-06-07 1447568 High CVE-2023-3421: Use after free in Media. Reported by Piotr Bania of Cisco Talos on 2023-05-22 1450397 High...