CVE-2015-3636

Description

The ping_unhash function in net/ipv4/ping.c in the Linux kernel before 4.0.3 does not initialize a certain list data structure during an unhash operation, which allows local users to gain privileges or cause a denial of service (use-after-free and system crash) by leveraging the ability to make a SOCK_DGRAM socket system call for the IPPROTO_ICMP or IPPROTO_ICMPV6 protocol, and then making a connect system call after a disconnect.

4.9

CVSS

Severity: Medium

CVSS 2.0 •

EPSS 1.61% Top 20%

Vendor Advisory debian.org Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory fedoraproject.org Vendor Advisory ubuntu.com

Affected: n/a n/a

References

Link	Tags
http://www.debian.org/security/2015/dsa-3290	vendor advisory
http://www.ubuntu.com/usn/USN-2631-1	vendor advisory
http://www.ubuntu.com/usn/USN-2634-1	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00011.html	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00009.html	vendor advisory
http://www.ubuntu.com/usn/USN-2632-1	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00008.html	vendor advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158804.html	vendor advisory
http://www.openwall.com/lists/oss-security/2015/05/02/5	mailing list
http://www.securitytracker.com/id/1033186	vdb entry
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
https://github.com/torvalds/linux/commit/a134f083e79fb4c3d0a925691e732c56911b4326
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/157897.html	vendor advisory
http://rhn.redhat.com/errata/RHSA-2015-1643.html	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00011.html	vendor advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.3
https://bugzilla.redhat.com/show_bug.cgi?id=1218074
http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00004.html	vendor advisory
http://rhn.redhat.com/errata/RHSA-2015-1583.html	vendor advisory
http://rhn.redhat.com/errata/RHSA-2015-1534.html	vendor advisory
http://rhn.redhat.com/errata/RHSA-2015-1564.html	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00023.html	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00007.html	vendor advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a134f083e79fb4c3d0a925691e732c56911b4326
http://rhn.redhat.com/errata/RHSA-2015-1221.html	vendor advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/157788.html	vendor advisory
http://www.ubuntu.com/usn/USN-2633-1	vendor advisory
http://www.securityfocus.com/bid/74450	vdb entry

Frequently Asked Questions

What is the severity of CVE-2015-3636?: CVE-2015-3636 has been scored as a medium severity vulnerability.
How to fix CVE-2015-3636?: To fix CVE-2015-3636, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2015-3636 being actively exploited in the wild?: It is possible that CVE-2015-3636 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.