Information disclosure in FreeBSD

1) Information disclosure

EUVDB-ID: #VU42615

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2013-5209

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

The sctp_send_initiate_ack function in sys/netinet/sctp_output.c in the SCTP implementation in the kernel in FreeBSD 8.3 through 9.2-PRERELEASE does not properly initialize the state-cookie data structure, which allows remote attackers to obtain sensitive information from kernel stack memory by reading packet data in INIT-ACK chunks.

Mitigation

Install update from vendor's website.

Vulnerable software versions

FreeBSD: 8.3 - 9.2

External links

http://svnweb.freebsd.org/base?view=revision&revision=254338
http://www.freebsd.org/security/advisories/FreeBSD-SA-13:10.sctp.asc
http://www.securityfocus.com/bid/61939
http://www.securitytracker.com/id/1028940
http://bugzilla.mozilla.org/show_bug.cgi?id=905080

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.