CVE-2022-48757: net: fix information leakage in /proc/net/ptype
First published: Thu Jun 20 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <4.4.302 | 4.4.302 |
| redhat/kernel | <4.9.300 | 4.9.300 |
| redhat/kernel | <4.14.265 | 4.14.265 |
| redhat/kernel | <4.19.228 | 4.19.228 |
| redhat/kernel | <5.4.176 | 5.4.176 |
| redhat/kernel | <5.10.96 | 5.10.96 |
| redhat/kernel | <5.15.19 | 5.15.19 |
| redhat/kernel | <5.16.5 | 5.16.5 |
| redhat/kernel | <5.17 | 5.17 |
| IBM Security Verify Governance - Identity Manager | <=ISVG 10.0.2 | |
| IBM Security Verify Governance, Identity Manager Software Stack | <=ISVG 10.0.2 | |
| IBM Security Verify Governance, Identity Manager Virtual Appliance | <=ISVG 10.0.2 | |
| IBM Security Verify Governance Identity Manager Container | <=ISVG 10.0.2 |
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Reference Links
- https://git.kernel.org/stable/c/47934e06b65637c88a762d9c98329ae6e3238888
- https://git.kernel.org/stable/c/839ec7039513a4f84bfbaff953a9393471176bee
- https://git.kernel.org/stable/c/8f88c78d24f6f346919007cd459fd7e51a8c7779
- https://git.kernel.org/stable/c/b67ad6170c0ea87391bb253f35d1f78857736e54
- https://git.kernel.org/stable/c/be1ca30331c7923c6f376610c1bd6059be9b1908
- https://git.kernel.org/stable/c/c38023032a598ec6263e008d62c7f02def72d5c7
- https://git.kernel.org/stable/c/db044d97460ea792110eb8b971e82569ded536c6
- https://git.kernel.org/stable/c/e372ecd455b6ebc7720f52bf4b5f5d44d02f2092
- https://git.kernel.org/stable/c/e43669c77cb3a742b7d84ecdc7c68c4167a7709b
- https://access.redhat.com/security/cve/CVE-2022-48757
- https://lore.kernel.org/linux-cve-announce/2024062007-CVE-2022-48757-c816@gregkh/T
- https://access.redhat.com/errata/RHSA-2024:5102
- https://access.redhat.com/errata/RHSA-2024:5101
- https://access.redhat.com/errata/RHSA-2024:6206
- https://bugzilla.redhat.com/show_bug.cgi?id=2293383
- https://www.ibm.com/support/pages/node/7230443 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2022-48757?
CVE-2022-48757 is classified as a low severity vulnerability due to information leakage in net namespaces.
How do I fix CVE-2022-48757?
To mitigate CVE-2022-48757, you should update to the latest kernel versions specified such as 4.4.302, 4.9.300, 4.14.265, 4.19.228, 5.4.176, 5.10.96, 5.15.19, 5.16.5, or 5.17.
What systems are affected by CVE-2022-48757?
CVE-2022-48757 affects specific versions of the Linux kernel in various distributions, including Red Hat versions listed in the vulnerability details.
What impact does CVE-2022-48757 have on system security?
The impact of CVE-2022-48757 allows users in one net namespace to observe packet types from another net namespace, potentially leading to unintended information disclosure.
Is there a known exploit for CVE-2022-48757?
As of now, there are no publicly known exploits specifically targeting CVE-2022-48757.
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