SB2017061633 - Memory leak in qemu (Alpine package)

Description

This security bulletin contains information about 1 vulnerability.

1) Memory leak (CVE-ID: CVE-2017-5856)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

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

The vulnerability exists due to memory leak within the megasas_handle_dcmd function in hw/scsi/megasas.c in QEMU (aka Quick Emulator) allows local guest OS privileged users to cause a denial of service (host memory consumption) via MegaRAID Firmware Interface (MFI) commands with the sglist size set to a value over 2 Gb. A remote attacker can perform a denial of service attack.

Remediation

Install update from vendor's website.

References

• https://git.alpinelinux.org/aports/commit/?id=64053e93d1b2192473cc16b8719d43e6b1c036a6
• https://git.alpinelinux.org/aports/commit/?id=4fd42213196834bf5e7a33f83e9e6775606a9aba
• https://git.alpinelinux.org/aports/commit/?id=e96a03d924c9b59bb4c163581b1e7c22c0bb9f4c