http://www.openwall.com/lists/oss-security/2020/01/17/2

https://gitlab.freedesktop.org/slirp/libslirp/commit/14ec36e107a8c9af7d0a80c3571fe39b291ff1d4

Debian

According to the versions of the qemu package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - tftp.c in libslirp 4.1.0, as used in QEMU 4.2.0, does     not prevent ..\ directory traversal on     Windows.(CVE-2020-7211)

  - interface_release_resource in hw/display/qxl.c in QEMU     4.0.0 has a NULL pointer dereference.(CVE-2019-12155)

  - QEMU 3.0.0 has an Integer Overflow because the     qga/commands*.c files do not check the length of the     argument list or the number of environment variables.
    NOTE: This has been disputed as not     exploitable.(CVE-2019-12247)

  - qemu-bridge-helper.c in QEMU 4.0.0 does not ensure that     a network interface name (obtained from bridge.conf or     a --br=bridge option) is limited to the IFNAMSIZ size,     which can lead to an ACL bypass.(CVE-2019-13164)

  - ip_reass in ip_input.c in libslirp 4.0.0 has a     heap-based buffer overflow via a large packet because     it mishandles a case involving the first     fragment.(CVE-2019-14378)

  - An issue was discovered in ide_dma_cb() in     hw/ide/core.c in QEMU 2.4.0 through 4.2.0. The guest     system can crash the QEMU process in the host system     via a special SCSI_IOCTL_SEND_COMMAND. It hits an     assertion that implies that the size of successful DMA     transfers there must be a multiple of 512 (the size of     a sector). NOTE: a member of the QEMU security team     disputes the significance of this issue because a     'privileged guest user has many ways to cause similar     DoS effect, without triggering this     assert.'(CVE-2019-20175)

  - hw/sparc64/sun4u.c in QEMU 3.1.50 is vulnerable to a     NULL pointer dereference, which allows the attacker to     cause a denial of service via a device     driver.(CVE-2019-5008)

  - An OOB heap buffer r/w access issue was found in the     NVM Express Controller emulation in QEMU. It could     occur in nvme_cmb_ops routines in nvme device. A guest     user/process could use this flaw to crash the QEMU     process resulting in DoS or potentially run arbitrary     code with privileges of the QEMU     process.(CVE-2018-16847)

  - hw/rdma/vmw/pvrdma_cmd.c in QEMU allows attackers to     cause a denial of service (NULL pointer dereference or     excessive memory allocation) in create_cq_ring or     create_qp_rings.(CVE-2018-20125)

  - QEMU can have an infinite loop in     hw/rdma/vmw/pvrdma_dev_ring.c because return values are     not checked (and -1 is mishandled).(CVE-2018-20216)

  - The load_multiboot function in hw/i386/multiboot.c in     Quick Emulator (aka QEMU) allows local guest OS users     to execute arbitrary code on the QEMU host via a     mh_load_end_addr value greater than mh_bss_end_addr,     which triggers an out-of-bounds read or write memory     access.(CVE-2018-7550)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for xen fixes the following issues :

CVE-2020-0543: Fixed a side channel attack against special registers which could have resulted in leaking of read values to cores other than the one which called it. This attack is known as Special Register Buffer Data Sampling (SRBDS) or 'CrossTalk' (bsc#1172205).

CVE-2020-11742: Bad continuation handling in GNTTABOP_copy (bsc#1169392).

CVE-2020-11740, CVE-2020-11741: xen: XSA-313 multiple xenoprof issues (bsc#1168140).

CVE-2020-11739: Missing memory barriers in read-write unlock paths (bsc#1168142).

CVE-2019-19583: Fixed improper checks which could have allowed HVM/PVH guest userspace code to crash the guest, leading to a guest denial of service (bsc#1158004 XSA-308).

CVE-2019-19581: Fixed a potential out of bounds on 32-bit Arm (bsc#1158003 XSA-307).

CVE-2019-19580: Fixed a privilege escalation where a malicious PV guest administrator could have been able to escalate their privilege to that of the host (bsc#1158006 XSA-310).

CVE-2019-19579: Fixed a privilege escalation where an untrusted domain with access to a physical device can DMA into host memory (bsc#1157888 XSA-306).

CVE-2019-19578: Fixed an issue where a malicious or buggy PV guest could have caused hypervisor crash resulting in denial of service affecting the entire host (bsc#1158005 XSA-309).

CVE-2019-19577: Fixed an issue where a malicious guest administrator could have caused Xen to access data structures while they are being modified leading to a crash (bsc#1158007 XSA-311).

Xenstored Crashed during VM install (bsc#1167152)

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for xen to version 4.12.2 fixes the following issues :

Security issues fixed :

CVE-2020-11742: Bad continuation handling in GNTTABOP_copy (bsc#1169392).

CVE-2020-11740, CVE-2020-11741: xen: XSA-313 multiple xenoprof issues (bsc#1168140).

CVE-2020-11739: Missing memory barriers in read-write unlock paths (bsc#1168142).

CVE-2020-11743: Bad error path in GNTTABOP_map_grant (bsc#1168143).

CVE-2020-7211: Fixed potential directory traversal using relative paths via tftp server on Windows host (bsc#1161181).

arm: a CPU may speculate past the ERET instruction (bsc#1160932).

Non-security issues fixed: Xenstored Crashed during VM install (bsc#1167152)

DomU hang: soft lockup CPU #0 stuck under high load (bsc#1165206, bsc#1134506)

Update API compatibility versions, fixes issues for libvirt.
(bsc#1167007, bsc#1157490)

aacraid blocks xen commands (bsc#1155200)

Problems Booting Fedora31 VM on sles15 sp1 Xen Dom0 (bsc#1162040).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for xen fixes the following issues :

Security issues fixed :

CVE-2020-11742: Bad continuation handling in GNTTABOP_copy (bsc#1169392).

CVE-2020-11740, CVE-2020-11741: xen: XSA-313 multiple xenoprof issues (bsc#1168140).

CVE-2020-11739: Missing memory barriers in read-write unlock paths (bsc#1168142).

CVE-2020-11743: Bad error path in GNTTABOP_map_grant (bsc#1168143).

CVE-2020-7211: Fixed potential directory traversal using relative paths via tftp server on Windows host (bsc#1161181).

arm: a CPU may speculate past the ERET instruction (bsc#1160932).

Non-security issues fixed: Xenstored Crashed during VM install (bsc#1167152)

DomU hang: soft lockup CPU #0 stuck under high load (bsc#1165206, bsc#1134506)

Update API compatibility versions, fixes issues for libvirt.
(bsc#1167007, bsc#1157490)

aacraid blocks xen commands (bsc#1155200)

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for xen fixes the following issues :

CVE-2018-12207: Fixed a race condition where untrusted virtual machines could have been using the Instruction Fetch Unit of the Intel CPU to cause a Machine Exception during Page Size Change, causing the CPU core to be non-functional (bsc#1155945 XSA-304).

CVE-2018-19965: Fixed a DoS from attempting to use INVPCID with a non-canonical addresses (bsc#1115045 XSA-279).

CVE-2019-11135: Aborting an asynchronous TSX operation on Intel CPUs with Transactional Memory support could be used to facilitate side-channel information leaks out of microarchitectural buffers, similar to the previously described 'Microarchitectural Data Sampling' attack. (bsc#1152497 XSA-305).

CVE-2019-12067: Fixed a NULL pointer dereference in QEMU AHCI (bsc#1145652).

CVE-2019-12068: Fixed an infinite loop while executing script (bsc#1146874).

CVE-2019-12155: Fixed a NULL pointer dereference while releasing spice resources (bsc#1135905).

CVE-2019-14378: Fixed a heap buffer overflow during packet reassembly in slirp networking implementation (bsc#1143797).

CVE-2019-15890: Fixed a use-after-free during packet reassembly (bsc#1149813).

CVE-2019-17340: Fixed grant table transfer issues on large hosts (XSA-284 bsc#1126140).

CVE-2019-17341: Fixed a race with pass-through device hotplug (XSA-285 bsc#1126141).

CVE-2019-17342: Fixed steal_page violating page_struct access discipline (XSA-287 bsc#1126192).

CVE-2019-17343: Fixed an inconsistent PV IOMMU discipline (XSA-288 bsc#1126195).

CVE-2019-17344: Fixed a missing preemption in x86 PV page table unvalidation (XSA-290 bsc#1126196).

CVE-2019-17347: Fixed a PV kernel context switch corruption (XSA-293 bsc#1126201).

CVE-2019-18420: Fixed a hypervisor crash that could be caused by malicious x86 PV guests, resulting in a denial of service (bsc#1154448 XSA-296).

CVE-2019-18421: Fixed a privilege escalation through malicious PV guest administrators (bsc#1154458 XSA-299).

CVE-2019-18424: Fixed a privilege escalation through DMA to physical devices by untrusted domains (bsc#1154461 XSA-302).

CVE-2019-18425: Fixed a privilege escalation from 32-bit PV guest used mode (bsc#1154456 XSA-298).

CVE-2019-19577: Fixed an issue where a malicious guest administrator could have caused Xen to access data structures while they are being modified leading to a crash (bsc#1158007 XSA-311).

CVE-2019-19578: Fixed an issue where a malicious or buggy PV guest could have caused hypervisor crash resulting in denial of service affecting the entire host (bsc#1158005 XSA-309).

CVE-2019-19579: Fixed a privilege escalation where an untrusted domain with access to a physical device can DMA into host memory (bsc#1157888 XSA-306).

CVE-2019-19580: Fixed a privilege escalation where a malicious PV guest administrator could have been able to escalate their privilege to that of the host (bsc#1158006 XSA-310).

CVE-2019-19581: Fixed a potential out of bounds on 32-bit Arm (bsc#1158003 XSA-307).

CVE-2019-19583: Fixed improper checks which could have allowed HVM/PVH guest userspace code to crash the guest, leading to a guest denial of service (bsc#1158004 XSA-308).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for xen fixes the following issues :

CVE-2020-7211: potential directory traversal using relative paths via tftp server on Windows host (bsc#1161181).

CVE-2019-19579: Device quarantine for alternate pci assignment methods (bsc#1157888).

CVE-2019-19581: find_next_bit() issues (bsc#1158003).

CVE-2019-19583: VMentry failure with debug exceptions and blocked states (bsc#1158004).

CVE-2019-19578: Linear pagetable use / entry miscounts (bsc#1158005).

CVE-2019-19580: Further issues with restartable PV type change operations (bsc#1158006).

CVE-2019-19577: dynamic height for the IOMMU pagetables (bsc#1158007).

CVE-2019-18420: VCPUOP_initialise DoS (bsc#1154448).

CVE-2019-18425: missing descriptor table limit checking in x86 PV emulation (bsc#1154456).

CVE-2019-18421: Issues with restartable PV type change operations (bsc#1154458).

CVE-2019-18424: passed through PCI devices may corrupt host memory after deassignment (bsc#1154461).

CVE-2018-12207: Machine Check Error Avoidance on Page Size Change (aka IFU issue) (bsc#1155945).

CVE-2019-11135: TSX Asynchronous Abort (TAA) issue (bsc#1152497).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
139983	EulerOS 2.0 SP8 : qemu (EulerOS-SA-2020-1880)	Nessus	Huawei Local Security Checks	medium
137624	SUSE SLES12 Security Update : xen (SUSE-SU-2020:1630-1)	Nessus	SuSE Local Security Checks	high
136164	SUSE SLES12 Security Update : xen (SUSE-SU-2020:1139-1)	Nessus	SuSE Local Security Checks	medium
136163	SUSE SLES12 Security Update : xen (SUSE-SU-2020:1138-1)	Nessus	SuSE Local Security Checks	medium
133763	SUSE SLES12 Security Update : xen (SUSE-SU-2020:0388-1)	Nessus	SuSE Local Security Checks	high
133539	SUSE SLES12 Security Update : xen (SUSE-SU-2020:0334-1)	Nessus	SuSE Local Security Checks	high

CVE-2020-7211

Description

References

Details

Risk Information

CVSS v2.0

CVSS v3.0

Vulnerable Software

Configuration 1

Configuration 2

Tenable Plugins