Bugzilla – Bug 1226695
VUL-0: CVE-2022-48757: kernel: net: fix information leakage in /proc/net/ptype
Last modified: 2024-06-21 17:22:05 UTC
In the Linux kernel, the following vulnerability has been resolved: net: fix information leakage in /proc/net/ptype In one net namespace, after creating a packet socket without binding it to a device, users in other net namespaces can observe the new `packet_type` added by this packet socket by reading `/proc/net/ptype` file. This is minor information leakage as packet socket is namespace aware. Add a net pointer in `packet_type` to keep the net namespace of of corresponding packet socket. In `ptype_seq_show`, this net pointer must be checked when it is not NULL. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-48757 https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2022/CVE-2022-48757.mbox https://git.kernel.org/stable/c/8f88c78d24f6f346919007cd459fd7e51a8c7779 https://git.kernel.org/stable/c/be1ca30331c7923c6f376610c1bd6059be9b1908 https://git.kernel.org/stable/c/c38023032a598ec6263e008d62c7f02def72d5c7 https://git.kernel.org/stable/c/b67ad6170c0ea87391bb253f35d1f78857736e54 https://git.kernel.org/stable/c/e372ecd455b6ebc7720f52bf4b5f5d44d02f2092 https://git.kernel.org/stable/c/db044d97460ea792110eb8b971e82569ded536c6 https://git.kernel.org/stable/c/e43669c77cb3a742b7d84ecdc7c68c4167a7709b https://git.kernel.org/stable/c/839ec7039513a4f84bfbaff953a9393471176bee https://git.kernel.org/stable/c/47934e06b65637c88a762d9c98329ae6e3238888 https://www.cve.org/CVERecord?id=CVE-2022-48757 https://bugzilla.redhat.com/show_bug.cgi?id=2293383