Vulnerability CVE-2017-7558


Published: 2018-07-26

Description:
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.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
Linux Kernel 4.8 (Ubuntu 16.04) sctp Kernel Pointer Leak
Jinbum Park
01.12.2018

Type:

CWE-125

(Out-of-bounds Read)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Linux -> Linux kernel 
Debian -> Debian linux 

 References:
http://seclists.org/oss-sec/2017/q3/338
http://www.securityfocus.com/bid/100466
http://www.securitytracker.com/id/1039221
https://access.redhat.com/errata/RHSA-2017:2918
https://access.redhat.com/errata/RHSA-2017:2930
https://access.redhat.com/errata/RHSA-2017:2931
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7558
https://marc.info/?l=linux-netdev&m=150348777122761&w=2
https://www.debian.org/security/2017/dsa-3981

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