1-Click on Hack Present in Well-liked Desktop Apps — Test If You are Utilizing Them


A number of one-click vulnerabilities have been found throughout quite a lot of in style software program functions, permitting an attacker to probably execute arbitrary code heading in the right direction methods.

The problems have been found by Optimistic Safety researchers Fabian Bräunlein and Lukas Euler and have an effect on apps like Telegram, Nextcloud, VLC, LibreOffice, OpenOffice, Bitcoin/Dogecoin Wallets, Wireshark, and Mumble.

“Desktop functions which move person provided URLs to be opened by the working system are continuously susceptible to code execution with person interplay,” the researchers said. “Code execution could be achieved both when a URL pointing to a malicious executable (.desktop, .jar, .exe, …) hosted on an web accessible file share (nfs, webdav, smb, …) is opened, or a further vulnerability within the opened software’s URI handler is exploited.”

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Put otherwise; the failings stem from an inadequate validation of URL enter that, when opened with the assistance of the underlying working system, results in inadvertent execution of a malicious file.

Optimistic Safety’s evaluation discovered that many apps didn’t validate the URLs, thereby permitting an adversary to craft a specially-crafted hyperlink pointing to a bit of assault code, leading to distant code execution.

Following accountable disclosure, many of the apps have launched patches to remediate the failings –

  • Nextcloud – Mounted in model 3.1.3 of Desktop Consumer launched on February 24 (CVE-2021-22879)
  • Telegram – Problem reported on January 11 and subsequently mounted by way of a server-side change on (or barely earlier than) February 10
  • VLC Player – Problem reported on January 18, with patched model 3.0.13 set for launch subsequent week
  • OpenOffice – To be mounted within the upcoming (CVE-2021-30245)
  • LibreOffice – Addressed in Home windows, however susceptible in Xubuntu (CVE-2021-25631)
  • Mumble – Mounted in model 1.3.4 launched on February 10 (CVE-2021-27229)
  • Dogecoin – Mounted in model 1.14.3 launched on February 28
  • Bitcoin ABC – Mounted in model 0.22.15 launched on March 9
  • Bitcoin Cash – Mounted in model 23.0.0 (at present in launch course of)
  • Wireshark – Mounted in model 3.4.4 launched on March 10 (CVE-2021-22191)
  • WinSCP – Mounted in model 5.17.10 launched on January 26 (CVE-2021-3331)
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“This difficulty spans a number of layers within the focused system’s software stack, subsequently making it straightforward for the maintainers of anyone to shift the blame and keep away from taking over the burden of implementing mitigation measures on their finish,” the researchers mentioned.

“Nevertheless, because of the variety of consumer methods and their configuration states, it’s essential that each celebration concerned takes on some quantity of accountability and provides their contribution within the type of mitigation measures” akin to URL validation and stopping distant shares from being auto-mounted.


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