SB2025091151 - Ubuntu update for qemu

Description

This security bulletin contains information about 7 secuirty vulnerabilities.

1) Double free (CVE-ID: CVE-2024-3446)

The vulnerability allows a malicious guest to escalate privileges on the system.

The vulnerability exists due to a boundary error in QEMU virtio devices (virtio-gpu, virtio-serial-bus, virtio-crypto), where the mem_reentrancy_guard flag insufficiently protects against DMA reentrancy issues. A malicious guest can trigger a double free error and execute arbitrary code within the context of the QEMU process on the host.

2) Heap-based buffer overflow (CVE-ID: CVE-2024-3447)

The vulnerability allows a malicious guest to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in the SDHCI device emulation. A malicious guest can set both "s->data_count" and the size of "s->fifo_buffer" to the value of "0x200" to trigger an out-of-bound memory access and perform a denial of service (DoS) attack.

3) Reachable assertion (CVE-ID: CVE-2024-3567)

The vulnerability allows a malicious guest to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion within the update_sctp_checksum() function in hw/net/net_tx_pkt.c when trying to calculate the checksum of a short-sized fragmented packet. A malicious guest can crash the QUEMU process.

4) Resource exhaustion (CVE-ID: CVE-2024-4467)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources within the qemu-img utility when handling a specially crafted image file containing a "json:{}" value. A remote attacker can trick the victim into loading a specially crafted image file and perform a denial of service (DoS) attack.

5) Out-of-bounds read (CVE-ID: CVE-2024-6505)

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition within the virtio-net device in QEMU when enabling the RSS feature on the virtio-net network card. A remote privileged user can trigger an out-of-bounds read error and perform a denial of service (DoS) attack.

6) Improper synchronization (CVE-ID: CVE-2024-7409)

The vulnerability allows a malicious guest to perform a denial of service (DoS) attack.

The vulnerability exists due to improper synchronization during socket closure in the QEMU NBD Server. A malicious guest can perform a denial of service (DoS) attack.

7) Reachable assertion (CVE-ID: CVE-2024-8354)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion within the usb_ep_get() function in hw/net/core.c when trying to get the USB endpoint from a USB device. A remote attacker can perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://ubuntu.com/security/notices/USN-7744-1