CVE-2021-3930

An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE SELECT commands in mode_sense_page() if the 'page' argument was set to MODE_PAGE_ALLS (0x3f). A malicious guest could use this flaw to potentially crash QEMU, resulting in a denial of service condition.

An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE SELECT commands in mode_sense_page() if the 'page' argument was set to MODE_PAGE_ALLS (0x3f). A malicious guest could use this flaw to potentially crash QEMU, resulting in a denial of service condition.

Kernel-based Virtual Machine (KVM) offers a full virtualization solution for Linux on numerous hardware platforms. The virt:Rocky Linux module contains packages which provide user-space components used to run virtual machines using KVM. The packages also provide APIs for managing and interacting with the virtualized systems.

Security Fix(es):

• QEMU: off-by-one error in mode_sense_page() in hw/scsi/scsi-disk.c (CVE-2021-3930)

• QEMU: net: e1000: infinite loop while processing transmit descriptors (CVE-2021-20257)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE SELECT commands in mode_sense_page() if the 'page' argument was set to MODE_PAGE_ALLS (0x3f). A malicious guest could use this flaw to potentially crash QEMU, resulting in a denial of service condition.

Kernel-based Virtual Machine (KVM) offers a full virtualization solution for Linux on numerous hardware platforms. The virt:rhel module contains packages which provide user-space components used to run virtual machines using KVM. The packages also provide APIs for managing and interacting with the virtualized systems.

Security Fix(es):

• QEMU: off-by-one error in mode_sense_page() in hw/scsi/scsi-disk.c (CVE-2021-3930)

• QEMU: net: e1000: infinite loop while processing transmit descriptors (CVE-2021-20257)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

This update for qemu fixes the following issues:

• CVE-2022-0358: Fixed a potential privilege escalation via virtiofsd (bsc#1195161).
• CVE-2021-3930: Fixed a potential denial of service in the emulated SCSI device (bsc#1192525).

Non-security fixes:

• Fixed a kernel data corruption via a long kernel boot cmdline (bsc#1196737).
• Included vmxcap in the qemu-tools package (bsc#1193364).
• Fixed package dependencies (bsc#1196087).
• Fixed an issue were PowerPC firmwares would not be built for non-PowerPC builds (bsc#1193545).
• Fixed multiple issues in I/O (bsc#1178049 bsc#1194938).

This update for xen fixes the following issues:

• CVE-2021-0089: Fixed Speculative Code Store Bypass (XSA-375) (bsc#1186433).
• CVE-2021-20255: Fixed stack overflow via infinite recursion in eepro100 (bsc#1182654).
• CVE-2021-28690: Fixed x86 TSX Async Abort protections not restored after S3 (XSA-377) (bsc#1186434).
• CVE-2021-28692: Fixed inappropriate x86 IOMMU timeout detection / handling (XSA-373) (bsc#1186429).
• CVE-2021-28697: Fixed grant table v2 status pages may remain accessible after de-allocation (XSA-379) (bsc#1189376).
• CVE-2021-28698: Fixed long running loops in grant table handling. (XSA-380) (bsc#1189378).
• CVE-2021-28701: Fixed race condition in XENMAPSPACE_grant_table handling (XSA-384) (bsc#1189632).
• CVE-2021-28703: Fixed grant table v2 status pages may remain accessible after de-allocation (take two) (XSA-387) (bsc#1192555).
• CVE-2021-28705, CVE-2021-28709: Fixed issues with partially successful P2M updates on x86 (XSA-389) (bsc#1192559).
• CVE-2021-28706: Fixed guests may exceed their designated memory limit (XSA-385) (bsc#1192554).
• CVE-2021-3527: Fixed unbounded stack allocation in usbredir (bsc#1186013).
• CVE-2021-3592: Fixed invalid pointer initialization may lead to information disclosure in slirp (bootp) (bsc#1187369).
• CVE-2021-3594: Fixed invalid pointer initialization may lead to information disclosure in slirp (udp) (bsc#1187378).
• CVE-2021-3595: Fixed invalid pointer initialization may lead to information disclosure in slirp (tftp) (bsc#1187376).
• CVE-2021-3682: Fixed free call on invalid pointer in usbredir bufp_alloc (bsc#1189150).
• CVE-2021-3930: Fixed off-by-one error in mode_sense_page() in hw/scsi/scsi-disk.c (bsc#1192526).

This update for qemu fixes the following issues:

• CVE-2022-0358: Fixed a potential privilege escalation via virtiofsd (bsc#1195161).
• CVE-2021-3930: Fixed a potential denial of service in the emulated SCSI device (bsc#1192525).

Non-security fixes:

• Fixed a kernel data corruption via a long kernel boot cmdline (bsc#1196737).
• Included vmxcap in the qemu-tools package (bsc#1193364).
• Fixed package dependencies (bsc#1196087).
• Fixed an issue were PowerPC firmwares would not be built for non-PowerPC builds (bsc#1193545).
• Fixed multiple issues in I/O (bsc#1178049 bsc#1194938).

This update for qemu fixes the following issues:

• CVE-2022-0358: Fixed a potential privilege escalation via virtiofsd (bsc#1195161).
• CVE-2021-3930: Fixed a potential denial of service in the emulated SCSI device (bsc#1192525).

Non-security fixes:

• Fixed a kernel data corruption via a long kernel boot cmdline (bsc#1196737).
• Included vmxcap in the qemu-tools package (bsc#1193364).
• Fixed package dependencies (bsc#1196087).
• Fixed an issue were PowerPC firmwares would not be built for non-PowerPC builds (bsc#1193545).
• Fixed multiple issues in I/O (bsc#1178049 bsc#1194938).

This update for qemu fixes the following issues:

• CVE-2021-20196: Fixed a denial of service in the floppy disk emulator (bsc#1181361).
• CVE-2021-3930: Fixed a potential denial of service in the emulated SCSI device (bsc#1192525).

Non-security fixes:

• Fixed a kernel data corruption via a long kernel boot cmdline (bsc#1196737).

Gaoning Pan discovered that QEMU incorrectly handled the floppy disk emulator. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2021-20196)

Gaoning Pan discovered that the QEMU vmxnet3 NIC emulator incorrectly handled certain values. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2021-20203)

It was discovered that the QEMU vhost-user GPU device contained several security issues. An attacker inside the guest could use these issues to cause QEMU to crash, resulting in a denial of service, leak sensitive information, or possibly execute arbitrary code. This issue only affected Ubuntu 21.10. (CVE-2021-3544, CVE-2021-3545, CVE-2021-3546)

It was discovered that QEMU incorrectly handled bulk transfers from SPICE clients. A remote attacker could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2021-3682)

It was discovered that the QEMU UAS device emulation incorrectly handled certain stream numbers. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 21.10. (CVE-2021-3713)

It was discovered that the QEMU virtio-net device incorrectly handled certain buffer addresses. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2021-3748)

It was discovered that the QEMU SCSI device emulation incorrectly handled certain MODE SELECT commands. An attacker inside the guest could possibly use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2021-3930)

It was discovered that the QEMU ACPI logic incorrectly handled certain values. An attacker inside the guest could possibly use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 21.10. (CVE-2021-4158)

Jietao Xiao, Jinku Li, Wenbo Shen, and Nanzi Yang discovered that the QEMU virtiofsd device incorrectly handled permissions when creating files. An attacker inside the guest could use this issue to create files inside the directory shared by virtiofs with unintended permissions, possibly allowing privilege escalation. This issue only affected Ubuntu 21.10. (CVE-2022-0358)

It was discovered that QEMU incorrectly handled bulk transfers from SPICE clients. A remote attacker could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. (CVE-2021-3682)

It was discovered that QEMU did not properly manage memory when it transfers the USB packets. A malicious guest attacker could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2021-3750)

It was discovered that the QEMU SCSI device emulation incorrectly handled certain MODE SELECT commands. An attacker inside the guest could possibly use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. (CVE-2021-3930)

It was discovered that QEMU did not properly manage memory when it processing repeated messages to cancel the current SCSI request. A malicious privileged guest attacker could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2022-0216)

It was discovered that QEMU did not properly manage memory when it using Tulip device emulation. A malicious guest attacker could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 22.10. (CVE-2022-2962)

It was discovered that QEMU did not properly manage memory when processing ClientCutText messages. A attacker could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 22.04 LTS and Ubuntu 22.10. (CVE-2022-3165)