Debian LTS: Security Advisory for qemu (DLA-2560-1)

The remote host is missing an update for the 'qemu' package(s) announced via the DLA-2560-1 advisory.

Several vulnerabilities were discovered in QEMU, a fast processor emulator (notably used in KVM and Xen HVM virtualization). An attacker could trigger a denial-of-service (DoS), information leak, and possibly execute arbitrary code with the privileges of the QEMU process on the host. CVE-2020-15469 A MemoryRegionOps object may lack read/write callback methods, leading to a NULL pointer dereference. CVE-2020-15859 QEMU has a use-after-free in hw/net/e1000e_core.c because a guest OS user can trigger an e1000e packet with the data's address set to the e1000e's MMIO address. CVE-2020-25084 QEMU has a use-after-free in hw/usb/hcd-xhci.c because the usb_packet_map return value is not checked. CVE-2020-28916 hw/net/e1000e_core.c has an infinite loop via an RX descriptor with a NULL buffer address. CVE-2020-29130 slirp.c has a buffer over-read because it tries to read a certain amount of header data even if that exceeds the total packet length. CVE-2020-29443 ide_atapi_cmd_reply_end in hw/ide/atapi.c allows out-of-bounds read access because a buffer index is not validated. CVE-2021-20181 9pfs: ZDI-CAN-10904: QEMU Plan 9 file system TOCTOU privilege escalation vulnerability. CVE-2021-20221 aarch64: GIC: out-of-bound heap buffer access via an interrupt ID field.

'qemu' package(s) on Debian Linux.

Checks if a vulnerable package version is present on the target host.

For Debian 9 stretch, these problems have been fixed in version 1:2.8+dfsg-6+deb9u13. We recommend that you upgrade your qemu packages.