A kernel data leak due to an out-of-bound read was found in the Linux kernel in inet_diag_msg_sctp{,l}addr_fill() and sctp_get_sctp_info() functions present since version 4.7-rc1 through version 4.13. A data leak happens when these functions fill in sockaddr data structures used to export socket's diagnostic information. As a result, up to 100 bytes of the slab data could be leaked to a userspace.
Find out more about CVE-2017-7558 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue does not affect Red Hat Enterprise Linux 5 and 6 as the code with the flaw is not present in the products listed.
This issue affects Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2. Future updates for the respective releases may address this issue.
| CVSS3 Base Score | 5.1 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
| Attack Vector | Local |
| Attack Complexity | High |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity Impact | None |
| Availability Impact | None |
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux for Real Time for NFV (v. 7) (kernel-rt) | RHSA-2017:2931 | 2017-10-19 |
| Red Hat Enterprise Linux 7 (kernel) | RHSA-2017:2930 | 2017-10-19 |
| Red Hat MRG Grid for RHEL 6 Server v.2 (kernel-rt) | RHSA-2017:2918 | 2017-10-19 |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-alt | Will not fix |
| Red Hat Enterprise Linux 6 | kernel | Not affected |
| Red Hat Enterprise Linux 5 | kernel | Not affected |
Vulmon