REDHAT-BUG-1932827
First published: Thu Feb 25 2021(Updated: )
A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU. The said 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. Upstream patch: --------------- -> <a href="https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07431.html">https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07431.html</a>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| QEMU |
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Reference Links
- 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://www.openwall.com/lists/oss-security/2021/02/26/1
- 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://bugzilla.redhat.com/show_bug.cgi?id=1932827
Frequently Asked Questions
What is the severity of REDHAT-BUG-1932827?
The severity of REDHAT-BUG-1932827 is critical due to its potential to cause CPU exhaustion and crashes.
How do I fix REDHAT-BUG-1932827?
To fix REDHAT-BUG-1932827, you should update to the latest version of QEMU that addresses this vulnerability.
What are the potential impacts of REDHAT-BUG-1932827?
The impacts of REDHAT-BUG-1932827 include excessive CPU consumption and possible crashes of the QEMU process.
Who is affected by REDHAT-BUG-1932827?
Users and systems running the affected versions of QEMU in loopback mode are at risk from REDHAT-BUG-1932827.
When was REDHAT-BUG-1932827 reported?
REDHAT-BUG-1932827 was reported in February 2021.
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