CVE-2020-7039: Buffer Overflow
First published: Tue Jan 07 2020(Updated: )
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): ------------------- -> <a href="https://gitlab.freedesktop.org/slirp/libslirp/commit/2655fffed7a9e765bcb4701dd876e9dab975f289">https://gitlab.freedesktop.org/slirp/libslirp/commit/2655fffed7a9e765bcb4701dd876e9dab975f289</a> -> <a href="https://gitlab.freedesktop.org/slirp/libslirp/commit/ce131029d6d4a405cb7d3ac6716d03e58fb4a5d9">https://gitlab.freedesktop.org/slirp/libslirp/commit/ce131029d6d4a405cb7d3ac6716d03e58fb4a5d9</a> -> <a href="https://gitlab.freedesktop.org/slirp/libslirp/commit/82ebe9c370a0e2970fb5695aa19aa5214a6a1c80">https://gitlab.freedesktop.org/slirp/libslirp/commit/82ebe9c370a0e2970fb5695aa19aa5214a6a1c80</a> Reference: ---------- -> <a href="https://www.openwall.com/lists/oss-security/2020/01/16/2">https://www.openwall.com/lists/oss-security/2020/01/16/2</a>
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/qemu-kvm | <2:0.12.1.2-2.506.el6_10.6 | 2:0.12.1.2-2.506.el6_10.6 |
| redhat/qemu-kvm | <10:1.5.3-173.el7 | 10:1.5.3-173.el7 |
| redhat/qemu-kvm-ma | <10:2.12.0-44.el7 | 10:2.12.0-44.el7 |
| redhat/qemu-kvm | <10:1.5.3-167.el7_7.6 | 10:1.5.3-167.el7_7.6 |
| redhat/qemu-kvm-ma | <10:2.12.0-33.el7_7.3 | 10:2.12.0-33.el7_7.3 |
| redhat/slirp4netns | <0:0.3.0-8.el7_7 | 0:0.3.0-8.el7_7 |
| redhat/slirp4netns | <0:0.4.2-3.git21fdece.el8 | 0:0.4.2-3.git21fdece.el8 |
| redhat/qemu-kvm-rhev | <10:2.12.0-33.el7_7.10 | 10:2.12.0-33.el7_7.10 |
| redhat/qemu-kvm-rhev | <10:2.12.0-44.el7 | 10:2.12.0-44.el7 |
| redhat/qemu-kvm-rhev | <10:2.12.0-44.el7_8.1 | 10:2.12.0-44.el7_8.1 |
| redhat/qemu-kvm-rhev | <10:2.12.0-18.el7_6.11 | 10:2.12.0-18.el7_6.11 |
| Libslirp Project Libslirp | =4.1.0 | |
| QEMU qemu | =4.2.0 | |
| Debian Debian Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| openSUSE Leap | =15.1 | |
| redhat/libslirp | <4.2.0 | 4.2.0 |
| debian/libslirp | 4.4.0-1+deb11u2 4.7.0-1 4.8.0-1 | |
| debian/qemu | 1:5.2+dfsg-11+deb11u3 1:5.2+dfsg-11+deb11u2 1:7.2+dfsg-7+deb12u7 1:9.2.0+ds-2 | |
| debian/slirp | 1:1.0.17-11 |
Remedy
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.
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-7039 https://nvd.nist.gov/vuln/detail/CVE-2020-7039
- https://bugzilla.redhat.com/show_bug.cgi?id=1791551
- https://access.redhat.com/errata/RHSA-2020:1261
- https://access.redhat.com/errata/RHSA-2020:0775
- https://access.redhat.com/errata/RHSA-2020:1116
- https://access.redhat.com/errata/RHSA-2020:1150
- https://access.redhat.com/errata/RHSA-2020:1351
- https://access.redhat.com/errata/RHSA-2020:1352
- https://access.redhat.com/errata/RHSA-2020:0889
- https://access.redhat.com/errata/RHSA-2020:0348
- https://access.redhat.com/errata/RHSA-2020:1358
- https://access.redhat.com/errata/RHSA-2020:1360
- https://access.redhat.com/errata/RHSA-2020:1344
- https://access.redhat.com/errata/RHBA-2020:0390
- https://access.redhat.com/errata/RHSA-2020:1300
- https://access.redhat.com/errata/RHSA-2020:1296
- https://access.redhat.com/errata/RHSA-2020:2730
- https://access.redhat.com/errata/RHSA-2020:2342
- https://access.redhat.com/security/cve/cve-2020-7039
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00007.html
- http://www.openwall.com/lists/oss-security/2020/01/16/2
- https://gitlab.freedesktop.org/slirp/libslirp/commit/2655fffed7a9e765bcb4701dd876e9dab975f289
- https://gitlab.freedesktop.org/slirp/libslirp/commit/82ebe9c370a0e2970fb5695aa19aa5214a6a1c80
- https://gitlab.freedesktop.org/slirp/libslirp/commit/ce131029d6d4a405cb7d3ac6716d03e58fb4a5d9
- https://lists.debian.org/debian-lts-announce/2020/01/msg00022.html
- https://lists.debian.org/debian-lts-announce/2020/01/msg00036.html
- https://lists.debian.org/debian-lts-announce/2021/02/msg00012.html
- https://seclists.org/bugtraq/2020/Feb/0
- https://security.gentoo.org/glsa/202005-02
- https://usn.ubuntu.com/4283-1/
- https://www.debian.org/security/2020/dsa-4616
- https://launchpad.net/bugs/cve/CVE-2020-7039
- https://www.openwall.com/lists/oss-security/2020/01/16/2
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1791552
- https://access.redhat.com/support/policy/updates/errata/
- https://github.com/rootless-containers/slirp4netns/security/advisories/GHSA-vjwg-42w7-w64h
- https://security-tracker.debian.org/tracker/CVE-2020-7039
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-7039
- https://nvd.nist.gov/vuln/detail/CVE-2020-7039
- https://ubuntu.com/security/CVE-2020-7039
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2020-7039.
What is the affected software?
The affected software includes libslirp 4.1.0 as used in QEMU 4.2.0.
What is the severity of CVE-2020-7039?
CVE-2020-7039 has a severity rating of high.
How does the vulnerability in tcp_emu affect the QEMU process?
The vulnerability can lead to a denial of service or potential remote code execution by crashing the QEMU process on the host.
Are there any fixes or remedies available?
Yes, there are fixes available. Please refer to the provided references for more information on the fixes.
- collector/redhat-cve
- collector/nvd-index
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2020-7039
- agent/software-canonical-lookup
- agent/severity
- agent/remedy
- agent/weakness
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/tags
- collector/usn-cve
- source/Ubuntu
- agent/description
- agent/event
- collector/nvd-cve
- source/NVD
- agent/last-modified-date
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- agent/trending
- package-manager/redhat
- vendor/libslirp project
- canonical/libslirp project libslirp
- version/libslirp project libslirp/4.1.0
- vendor/qemu
- canonical/qemu qemu
- version/qemu qemu/4.2.0
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/8.0
- version/debian debian linux/9.0
- vendor/opensuse
- canonical/opensuse leap
- version/opensuse leap/15.1
- package-manager/debian