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CVE-2019-12068

Status Candidate

Overview

In QEMU 1:4.1-1, 1:2.1+dfsg-12+deb8u6, 1:2.8+dfsg-6+deb9u8, 1:3.1+dfsg-8~deb10u1, 1:3.1+dfsg-8+deb10u2, and 1:2.1+dfsg-12+deb8u12 (fixed), when executing script in lsi_execute_script(), the LSI scsi adapter emulator advances 's->dsp' index to read next opcode. This can lead to an infinite loop if the next opcode is empty. Move the existing loop exit after 10k iterations so that it covers no-op opcodes as well.

Related Files

Debian Security Advisory 4665-1
Posted Apr 28, 2020
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4665-1 - Multiple security issues were discovered in QEMU, a fast processor emulator, which could result in denial of service or the execution of arbitrary code.

tags | advisory, denial of service, arbitrary
systems | linux, debian
advisories | CVE-2019-12068, CVE-2019-15034, CVE-2019-20382, CVE-2020-1983
SHA-256 | 81315edbca95ad15b3796581291dff9ece1d005c96f9de1a1801e5a62f53b2d7
Ubuntu Security Notice USN-4191-1
Posted Nov 14, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4191-1 - It was discovered that the LSI SCSI adapter emulator implementation in QEMU did not properly validate executed scripts. A local attacker could use this to cause a denial of service. Sergej Schumilo, Cornelius Aschermann and Simon Woerner discovered that the qxl paravirtual graphics driver implementation in QEMU contained a null pointer dereference. A local attacker in a guest could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, local
systems | linux, ubuntu
advisories | CVE-2019-12068, CVE-2019-12155, CVE-2019-13164, CVE-2019-14378, CVE-2019-15890
SHA-256 | aee81e66d46141ffe8a014607d051bd70b2b1232ee96bcb442a1838008da393b
Ubuntu Security Notice USN-4191-2
Posted Nov 14, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4191-2 - USN-4191-2 fixed a vulnerability in QEMU. This update provides the corresponding update for Ubuntu 14.04 ESM. It was discovered that the LSI SCSI adapter emulator implementation in QEMU did not properly validate executed scripts. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, local
systems | linux, ubuntu
advisories | CVE-2019-12068, CVE-2019-12155, CVE-2019-13164, CVE-2019-14378, CVE-2019-15890
SHA-256 | ae017f5886a9bd72e047c3db07423197155e2dbe1d4b843e052ead1516d83a3a
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