CVE-2018-20815: Buffer Overflow
First published: Wed Mar 27 2019(Updated: )
A heap buffer overflow issue was found in the load_device_tree() function of QEMU, which is invoked to load device tree blob at boot time. It occurs due to device tree size manipulation before buffer allocation, which could overflow a signed int type. A user/process could use this flaw to potentially execute arbitrary code on a host system with privileges of the QEMU process. Upstream patch: --------------- -> <a href="https://git.qemu.org/?p=qemu.git;a=commitdiff;h=da885fe1ee8b4589047484bd7fa05a4905b52b17">https://git.qemu.org/?p=qemu.git;a=commitdiff;h=da885fe1ee8b4589047484bd7fa05a4905b52b17</a> -> <a href="https://git.qemu.org/?p=qemu.git;a=commitdiff;h=065e6298a75164b4347682b63381dbe752c2b156">https://git.qemu.org/?p=qemu.git;a=commitdiff;h=065e6298a75164b4347682b63381dbe752c2b156</a> Reference: ---------- -> <a href="https://www.openwall.com/lists/oss-security/2019/03/27/1">https://www.openwall.com/lists/oss-security/2019/03/27/1</a>
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| QEMU KVM | =3.1.0 | |
| debian/qemu | 1:5.2+dfsg-11+deb11u3 1:5.2+dfsg-11+deb11u2 1:7.2+dfsg-7+deb12u12 1:9.2.0+ds-5 |
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Reference Links
- https://access.redhat.com/errata/RHSA-2019:1667
- https://access.redhat.com/errata/RHSA-2019:1723
- https://access.redhat.com/errata/RHSA-2019:1743
- https://access.redhat.com/errata/RHSA-2019:1881
- https://access.redhat.com/errata/RHSA-2019:1968
- https://access.redhat.com/errata/RHSA-2019:2507
- https://access.redhat.com/errata/RHSA-2019:2553
- https://git.qemu.org/?p=qemu.git;a=commitdiff;h=da885fe1ee8b4589047484bd7fa05a4905b52b17
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BOE3PVFPMWMXV3DGP2R3XIHAF2ZQU3FS/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RVDHJB2QKXNDU7OFXIHIL5O5VN5QCSZL/
- https://seclists.org/bugtraq/2019/Aug/41
- https://www.debian.org/security/2019/dsa-4506
- https://launchpad.net/bugs/cve/CVE-2018-20815
- https://git.qemu.org/?p=qemu.git;a=commitdiff;h=065e6298a75164b4347682b63381dbe752c2b156
- https://www.openwall.com/lists/oss-security/2019/03/27/1
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1693117
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1693118
- https://access.redhat.com/errata/RHSA-2019:1175
- https://bugzilla.redhat.com/show_bug.cgi?id=1693101
- https://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=da885fe1ee8b4589047484bd7fa05a4905b52b17
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BOE3PVFPMWMXV3DGP2R3XIHAF2ZQU3FS/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RVDHJB2QKXNDU7OFXIHIL5O5VN5QCSZL/
- https://security-tracker.debian.org/tracker/CVE-2018-20815
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20815
- https://nvd.nist.gov/vuln/detail/CVE-2018-20815
- https://ubuntu.com/security/CVE-2018-20815
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2018-20815.
What is the severity of CVE-2018-20815?
CVE-2018-20815 has a severity rating of high.
Which software versions are affected by CVE-2018-20815?
Various versions of QEMU are affected, including 1:2.11+dfsg-1ubuntu7.13, 1:2.12+dfsg-3ubuntu8.7, 1:3.1+dfsg-2ubuntu4, and more.
How can I fix CVE-2018-20815?
To fix CVE-2018-20815, update to a version of QEMU that includes the necessary security patches, such as 1:2.11+dfsg-1ubuntu7.13 or 1:2.12+dfsg-3ubuntu8.7.
Where can I find more information about CVE-2018-20815?
More information about CVE-2018-20815 can be found in the references provided, including the commitdiff links and the OSS Security mailing list.
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