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Files from Reno Robert

First Active2018-12-06
Last Active2019-08-06
FreeBSD Security Advisory - FreeBSD-SA-19:21.bhyve
Posted Aug 6, 2019
Authored by Reno Robert | Site security.freebsd.org

FreeBSD Security Advisory - The e1000 network adapters permit a variety of modifications to an Ethernet packet when it is being transmitted. These include the insertion of IP and TCP checksums, insertion of an Ethernet VLAN header, and TCP segmentation offload ("TSO"). The e1000 device model uses an on-stack buffer to generate the modified packet header when simulating these modifications on transmitted packets. When TCP segmentation offload is requested for a transmitted packet, the e1000 device model used a guest-provided value to determine the size of the on-stack buffer without validation. The subsequent header generation could overflow an incorrectly sized buffer or indirect a pointer composed of stack garbage. A misbehaving bhyve guest could overwrite memory in the bhyve process on the host.

tags | advisory, overflow, tcp
systems | freebsd
advisories | CVE-2019-5609
MD5 | 26840b488f085103047559c3820eb233
FreeBSD Security Advisory - FreeBSD-SA-19:16.bhyve
Posted Jul 25, 2019
Authored by Reno Robert | Site security.freebsd.org

FreeBSD Security Advisory - The pci_xhci_device_doorbell() function does not validate the 'epid' and 'streamid' provided by the guest, leading to an out-of-bounds read. A misbehaving bhyve guest could crash the system or access memory that it should not be able to.

tags | advisory
systems | freebsd, bsd
advisories | CVE-2019-5604
MD5 | 71bf823754b425dc351c08e498f7d8ae
FreeBSD Security Advisory - FreeBSD-SA-18:15.bootpd
Posted Dec 20, 2018
Authored by Reno Robert | Site security.freebsd.org

FreeBSD Security Advisory - Due to insufficient validation of network-provided data it may be possible for a malicious attacker to craft a bootp packet which could cause a stack buffer overflow. It is possible that the buffer overflow could lead to a Denial of Service or remote code execution.

tags | advisory, remote, denial of service, overflow, code execution
systems | freebsd
advisories | CVE-2018-17161
MD5 | 88112b48fbe7ec1d8945f0322a19ff3f
FreeBSD Security Advisory - FreeBSD-SA-18:14.bhyve
Posted Dec 6, 2018
Authored by Reno Robert | Site security.freebsd.org

FreeBSD Security Advisory - Insufficient bounds checking in one of the device models provided by bhyve(8) can permit a guest operating system to overwrite memory in the bhyve(8) processing possibly permitting arbitrary code execution. A guest OS using a firmware image can cause the bhyve process to crash, or possibly execute arbitrary code on the host as root.

tags | advisory, arbitrary, root, code execution
systems | freebsd, bsd
advisories | CVE-2018-17160
MD5 | 7dc5a9cc50e7bfcc59073a947a869ea7
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