CVE-2021-3416
First published: Thu Feb 25 2021(Updated: )
A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the host resulting in DoS scenario.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| QEMU qemu | <=5.2.0 | |
| Fedoraproject Fedora | =33 | |
| Redhat Enterprise Linux | =6.0 | |
| Redhat Enterprise Linux | =7.0 | |
| Redhat Enterprise Linux | =8.0 | |
| Redhat Enterprise Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| 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 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1932827
- https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
- https://security.gentoo.org/glsa/202208-27
- https://security.netapp.com/advisory/ntap-20210507-0002/
- https://www.openwall.com/lists/oss-security/2021/02/26/1
- https://launchpad.net/bugs/cve/CVE-2021-3416
- https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07431.html
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1932828
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1932829
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1933827
- https://lists.gnu.org/archive/html/qemu-devel/2021-03/msg01550.html
- https://git.qemu.org/?p=qemu.git;a=commit;h=705df5466c98f3efdd2b68d3b31dad86858acad7
- https://git.qemu.org/?p=qemu.git;a=commit;h=1caff0340f49c93d535c6558a5138d20d475315c
- https://git.qemu.org/?p=qemu.git;a=commit;h=331d2ac9ea307c990dc86e6493e8f0c48d14bb33
- https://git.qemu.org/?p=qemu.git;a=commit;h=26194a58f4eb83c5bdf4061a1628508084450ba1
- https://git.qemu.org/?p=qemu.git;a=commit;h=8c92060d3c0248bd4d515719a35922cd2391b9b4
- https://git.qemu.org/?p=qemu.git;a=commit;h=8c552542b81e56ff532dd27ec6e5328954bdda73
- https://git.qemu.org/?p=qemu.git;a=commit;h=5311fb805a4403bba024e83886fa0e7572265de4
- https://git.qemu.org/?p=qemu.git;a=commit;h=99ccfaa1edafd79f7a3a0ff7b58ae4da7c514928
- https://git.qemu.org/?p=qemu.git;a=commit;h=e73adfbeec9d4e008630c814759052ed945c3fed
- https://git.qemu.org/?p=qemu.git;a=commit;h=37cee01784ff0df13e5209517e1b3594a5e792d1
- https://access.redhat.com/errata/RHSA-2021:3061
- https://access.redhat.com/security/cve/cve-2021-3416
- https://access.redhat.com/errata/RHSA-2021:3703
- https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07484.html
- https://security-tracker.debian.org/tracker/CVE-2021-3416
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3416
- https://nvd.nist.gov/vuln/detail/CVE-2021-3416
- https://ubuntu.com/security/CVE-2021-3416
Frequently Asked Questions
What is CVE-2021-3416?
CVE-2021-3416 is a potential stack overflow via infinite loop issue found in various NIC emulators of QEMU.
What is the severity of CVE-2021-3416?
CVE-2021-3416 has a severity level of medium.
Which versions of QEMU are affected by CVE-2021-3416?
Versions up to and including 5.2.0 of QEMU are affected by CVE-2021-3416.
How can CVE-2021-3416 be exploited?
A guest user/process can exploit CVE-2021-3416 to consume CPU cycles or crash the QEMU process.
Are there any remedies available for CVE-2021-3416?
Yes, there are remedies available for CVE-2021-3416. Please refer to the relevant links for more information.
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