A heap buffer overflow issue was found in the SLiRP networking implementation of the QEMU emulator. It occurs in tcp_emu() routine while emulating IRC and other protocols. A user/process could use this flaw to crash the Qemu process on the host resulting in DoS or potentially execute arbitrary code with privileges of the QEMU process. Upstream patch(es): ------------------- -> https://gitlab.freedesktop.org/slirp/libslirp/commit/2655fffed7a9e765bcb4701dd876e9dab975f289 -> https://gitlab.freedesktop.org/slirp/libslirp/commit/ce131029d6d4a405cb7d3ac6716d03e58fb4a5d9 -> https://gitlab.freedesktop.org/slirp/libslirp/commit/82ebe9c370a0e2970fb5695aa19aa5214a6a1c80 Reference: ---------- -> https://www.openwall.com/lists/oss-security/2020/01/16/2
Acknowledgments: Name: Vishnu Dev TJ
Created qemu tracking bugs for this issue: Affects: fedora-all [bug 1791552]
Mitigation: This issue can only be resolved by applying updates. Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Statement: This issue affects user-mode or SLiRP networking implementation of the QEMU emulator. Though qemu-kvm package is built with SLiRP networking support, due to its limitations, it is not used by the virtual machine guests by default. This issue affects versions of the qemu-kvm package as shipped with Red Hat Enterprise Linux 5, 6, 7, 8 and Red Hat Enterprise Linux Advanced Virtualization 8. Future qemu-kvm package updates for Red Hat Enterprise Linux 6, 7, 8 and Red Hat Enterprise Linux Advanced Virtualization 8 may address this issue. Red Hat Enterprise Linux 5 is now in Maintenance Support 2 Phase of the support and maintenance life cycle. This issue is currently not planned to be addressed in its future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/. Red Hat OpenStack Platform: * This flaw impacts KVM user-mode or SLIRP networking, which is not used in Red Hat OpenStack Platform. Although updating is recommended for affected versions (see below), Red Hat OpenStack Platform environments are not vulnerable.
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2020:0348 https://access.redhat.com/errata/RHSA-2020:0348
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2020-7039
This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Via RHSA-2020:0775 https://access.redhat.com/errata/RHSA-2020:0775
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Extras Via RHSA-2020:0889 https://access.redhat.com/errata/RHSA-2020:0889
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2020:1116 https://access.redhat.com/errata/RHSA-2020:1116
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2020:1150 https://access.redhat.com/errata/RHSA-2020:1150
This issue has been addressed in the following products: Advanced Virtualization for RHEL 8.1.1 Via RHSA-2020:1261 https://access.redhat.com/errata/RHSA-2020:1261
This issue has been addressed in the following products: Red Hat OpenStack Platform 13.0 (Queens) Via RHSA-2020:1296 https://access.redhat.com/errata/RHSA-2020:1296
This issue has been addressed in the following products: Red Hat OpenStack Platform 10.0 (Newton) Via RHSA-2020:1300 https://access.redhat.com/errata/RHSA-2020:1300
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions Via RHSA-2020:1344 https://access.redhat.com/errata/RHSA-2020:1344
This issue has been addressed in the following products: Red Hat Enterprise Linux 7.7 Extended Update Support Via RHSA-2020:1351 https://access.redhat.com/errata/RHSA-2020:1351
This issue has been addressed in the following products: Red Hat Enterprise Linux 7.7 Extended Update Support Via RHSA-2020:1352 https://access.redhat.com/errata/RHSA-2020:1352
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2020:1358 https://access.redhat.com/errata/RHSA-2020:1358
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2020:1360 https://access.redhat.com/errata/RHSA-2020:1360
This issue has been addressed in the following products: Red Hat Virtualization Engine 4.2 Via RHSA-2020:2342 https://access.redhat.com/errata/RHSA-2020:2342
This issue has been addressed in the following products: Red Hat OpenStack Platform 13.0 (Queens) Red Hat OpenStack Platform 13.0 (Queens) for RHEL 7.6 EUS Via RHSA-2020:2730 https://access.redhat.com/errata/RHSA-2020:2730