A vulnerability in the seccomp filters of Canonical snapd before version 2.37.4 allows a strict mode snap to insert characters into a terminal on a 64-bit host. The seccomp rules were generated to match 64-bit ioctl(2) commands on a 64-bit platform; however, the Linux kernel only uses the lower 32 bits to determine which ioctl(2) commands to run. This issue affects: Canonical snapd versions prior to 2.37.4.

References

• https://nvd.nist.gov/vuln/detail/CVE-2019-7303
• https://usn.ubuntu.com/3917-1/
• https://www.exploit-db.com/exploits/46594