Information disclosure in Linux Kernel

1) Out-of-bounds read

EUVDB-ID: #VU8008

Risk: Low

CVSSv3.1: 5.2 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:U/RC:C]

CVE-ID: CVE-2017-7558

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: Yes

Description

The vulnerability allows a local attacker to obtain potentially sensitive information.

The weakness exists due to put-of-bounds read in the inet_diag_msg_sctpaddrs_fill(), inet_diag_msg_sctpladdrs_fill(), and sctp_get_sctp_info() functions in 'net/sctp/sctp_diag.c'. A local attacker can gain access to important data in portions of slab memory on the target system.

Mitigation

Update to the latest version.

Vulnerable software versions

Linux kernel: 4.7.0 - 4.13 rc6

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:4.7.10:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.8.17:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.44:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.10.17:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.11.12:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.13:rc6:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.12.8:*:*:*:*:*:*:*

External links

http://marc.info/?l=linux-netdev&m=150348777122761&w=2

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.