7.8
CWE
119 787 122
Advisory Published
CVE Published
CVE Published
Updated

CVE-2019-6778: Buffer Overflow

First published: Tue Jan 08 2019(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 Identification protocol and copying message data to a socket buffer. 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: --------------- -&gt; <a href="https://lists.gnu.org/archive/html/qemu-devel/2019-01/msg03132.html">https://lists.gnu.org/archive/html/qemu-devel/2019-01/msg03132.html</a> Reference: ---------- -&gt; <a href="https://www.openwall.com/lists/oss-security/2019/01/24/5">https://www.openwall.com/lists/oss-security/2019/01/24/5</a>

Credit: cve@mitre.org cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/qemu-kvm<2:0.12.1.2-2.506.el6_10.5
2:0.12.1.2-2.506.el6_10.5
redhat/qemu-kvm<10:1.5.3-160.el7_6.3
10:1.5.3-160.el7_6.3
redhat/qemu-kvm-rhev<10:2.12.0-33.el7
10:2.12.0-33.el7
redhat/qemu-kvm-rhev<10:2.12.0-18.el7_6.7
10:2.12.0-18.el7_6.7
debian/qemu
1:5.2+dfsg-11+deb11u3
1:5.2+dfsg-11+deb11u2
1:7.2+dfsg-7+deb12u7
1:9.1.2+ds-1
debian/slirp4netns
1.0.1-2
1.2.0-1
1.2.1-1
QEMU KVM=3.0.0
openSUSE=15.0
openSUSE=42.3
Fedoraproject Fedora=29
Fedoraproject Fedora=30
Ubuntu Linux=14.04
Ubuntu Linux=16.04
Ubuntu Linux=18.04
Ubuntu Linux=18.10
Fedora=29
Fedora=30
Ubuntu=14.04
Ubuntu=16.04
Ubuntu=18.04
Ubuntu=18.10

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2019-6778?

    CVE-2019-6778 has been rated as critical due to the potential for a heap buffer overflow leading to a crash of the QEMU process.

  • How do I fix CVE-2019-6778?

    To mitigate CVE-2019-6778, upgrade QEMU to versions 2:0.12.1.2-2.506.el6_10.5 or higher for RHEL systems or the specific patched versions for Debian and Ubuntu as stated in the vulnerability advisory.

  • What systems are affected by CVE-2019-6778?

    CVE-2019-6778 affects various versions of QEMU and QEMU KVM across multiple distributions including Red Hat, Debian, and Ubuntu.

  • What could happen if CVE-2019-6778 is exploited?

    Exploitation of CVE-2019-6778 could allow an attacker to crash the QEMU process, leading to service disruption on the host.

  • Is there a workaround for CVE-2019-6778?

    There is no official workaround for CVE-2019-6778; the only solution is to upgrade to a fixed version of QEMU.

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