#VU32415 Buffer overflow in Xen - CVE-2015-3209

Vulnerability identifier: #VU32415

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2015-3209

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Xen
Server applications / Virtualization software

Vendor: Xen Project

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

Heap-based buffer overflow in the PCNET controller in QEMU allows remote attackers to execute arbitrary code by sending a packet with TXSTATUS_STARTPACKET set and then a crafted packet with TXSTATUS_DEVICEOWNS set.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Xen: 4.24

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External links
https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10698
https://lists.fedoraproject.org/pipermail/package-announce/2015-June/160669.html
https://lists.fedoraproject.org/pipermail/package-announce/2015-June/160677.html
https://lists.fedoraproject.org/pipermail/package-announce/2015-June/160685.html
https://lists.opensuse.org/opensuse-security-announce/2015-06/msg00004.html
https://lists.opensuse.org/opensuse-security-announce/2015-06/msg00007.html
https://lists.opensuse.org/opensuse-security-announce/2015-06/msg00027.html
https://lists.opensuse.org/opensuse-security-announce/2015-06/msg00029.html
https://lists.opensuse.org/opensuse-security-announce/2015-06/msg00030.html
https://lists.opensuse.org/opensuse-security-announce/2015-07/msg00014.html
https://lists.opensuse.org/opensuse-security-announce/2015-08/msg00020.html
https://lists.opensuse.org/opensuse-security-announce/2015-09/msg00015.html
https://lists.opensuse.org/opensuse-security-announce/2015-09/msg00027.html
https://rhn.redhat.com/errata/RHSA-2015-1087.html
https://rhn.redhat.com/errata/RHSA-2015-1088.html
https://rhn.redhat.com/errata/RHSA-2015-1089.html
https://rhn.redhat.com/errata/RHSA-2015-1189.html
https://www.debian.org/security/2015/dsa-3284
https://www.debian.org/security/2015/dsa-3285
https://www.debian.org/security/2015/dsa-3286
https://www.securityfocus.com/bid/75123
https://www.securitytracker.com/id/1032545
https://www.ubuntu.com/usn/USN-2630-1
https://xenbits.xen.org/xsa/advisory-135.html
https://kb.juniper.net/JSA10783
https://security.gentoo.org/glsa/201510-02
https://security.gentoo.org/glsa/201604-03

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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.