Vulnerability Spotlight: Memory corruption vulnerability in GNU Glibc leaves smart vehicles open to attack
Summary: Cisco's Customer Experience Assessment & Penetration Team found a memory corruption vulnerability, TALOS-2020-1019/CVE-2020-6096, in GNU libc for ARMv7 that leaves Linux ARMv7 systems open to exploitation, with a fix planned for August. During a penetration test of a connected vehicle, the team found an integer underflow in an externally exposed embedded web server that led to remote code execution, because the ARMv7 memcpy() implementation treats its length argument as signed and copied 55 bytes instead of the 4,294,966,583 bytes requested.
What's compelling: The flaw is in a standard library function, so the same signed-branch behavior in ARMv7 memcpy() can turn what should be a crash into a working exploit path - here a reverse shell from a connected vehicle reachable over its own Wi-Fi network.
Read the original at Cisco Talos ↗
- Topics
- Vulnerabilities & Patching
- Mentions
- CVE-2020-6096
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