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Serbian Student's Android Phone Compromised By Exploit From Cellebrite

Slashdot
2 months 1 week ago
An anonymous reader quotes a report from Ars Technica: Amnesty International on Friday said it determined that a zero-day exploit sold by controversial exploit vendor Cellebrite was used to compromise the phone of a Serbian student who had been critical of that country's government. [...] The chain exploited a series of vulnerabilities in device drivers the Linux kernel uses to support USB hardware. "This new case provides further evidence that the authorities in Serbia have continued their campaign of surveillance of civil society in the aftermath of our report, despite widespread calls for reform, from both inside Serbia and beyond, as well as an investigation into the misuse of its product, announced by Cellebrite," authors of the report wrote. Amnesty International first discovered evidence of the attack chain last year while investigating a separate incident outside of Serbia involving the same Android lockscreen bypass. [...] The report said that one of the vulnerabilities, tracked as CVE-2024-53104, was patched earlier this month with the release of the February 2025 Android Security Bulletin. Two other vulnerabilities -- CVE-2024-53197 and CVE-2024-50302 -- have been patched upstream in the Linux kernel but have not yet been incorporated into Android. Forensic traces identified in Amnesty International's analysis of the compromised phone showed that the Serbian authorities tried to install an unknown application after the device had been unlocked. The report authors said the installation of apps on Cellebrite-compromised devices was consistent with earlier cases the group has uncovered in which spyware tracked as NoviSpy spyware were installed. As part of the attack, the USB port of the targeted phone was connected to various peripherals during the initial stages. In later stages, the peripherals repeatedly connected to the phone so they could "disclose kernel memory and groom kernel memory as part of the exploitation." The people analyzing the phone said the peripherals were likely special-purpose devices that emulated video or sound devices connecting to the targeted device. The 23-year-old student who owned the phone regularly participates in the ongoing student protests in Belgrade. Any Android users who have yet to install the February patch batch should do so as soon as possible.

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