CVE-2020-11947
published 2020-12-31CVE-2020-11947: iscsi_aio_ioctl_cb in block/iscsi.c in QEMU 4.1.0 has a heap-based buffer over-read that may disclose unrelated information from process memory to an attacker.
PriorityP412low3.8CVSS 3.1
AVLACLPRLUINSCCLINAN
EPSS
0.46%
37.0th percentile
iscsi_aio_ioctl_cb in block/iscsi.c in QEMU 4.1.0 has a heap-based buffer over-read that may disclose unrelated information from process memory to an attacker.
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | qemu | < qemu 1:4.2-7 (bookworm) | qemu 1:4.2-7 (bookworm) |
| qemu | qemu | — | — |
| qemu | qemu | >= 0 < 1:4.2-7 | 1:4.2-7 |
| qemu | qemu | >= 0 < 1:4.2-7 | 1:4.2-7 |
| qemu | qemu | >= 0 < 1:4.2-7 | 1:4.2-7 |
| qemu | qemu | >= 0 < 1:4.2-7 | 1:4.2-7 |
| qemu | qemu | >= 0 < 1:2.5+dfsg-5ubuntu10.49 | 1:2.5+dfsg-5ubuntu10.49 |
| qemu | qemu | >= 0 < 1:2.11+dfsg-1ubuntu7.35 | 1:2.11+dfsg-1ubuntu7.35 |
| qemu | qemu | >= 0 < 1:4.2-3ubuntu6.12 | 1:4.2-3ubuntu6.12 |
| ubuntu | qemu | — | — |
CVSS provenance
nvdv3.13.8LOWCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
nvdv2.02.1LOWAV:L/AC:L/Au:N/C:P/I:N/A:N
osv3.8LOW
vendor_debian3.8LOW
vendor_redhat3.8LOW
vendor_ubuntu3.8LOW
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Ubuntu
QEMU regression
vendor_ubuntu·2026-06-28·CVSS 3.8
CVE-2020-11947 [LOW] QEMU regression
Title: QEMU regression
Summary: USN-8412-1 introduced a regression in QEMU
USN-8412-1 fixed vulnerabilities QEMU. On Ubuntu 20.04 LTS, the fix for
CVE-2024-4467 was incomplete and prevented the creation of boot volumes
from qcow2 images. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Felipe Franciosi, Raphael Norwitz, and Peter Turschmid discovered that the
iSCSI block driver in QEMU incorrectly handled certain responses from an
iSCSI server. A remote attacker could possibly use this issue to cause
QEMU to crash, resulting in a denial of service, or possibly execute
arbitrary code. This issue only affected Ubuntu 14.04 LTS. (CVE-2020-1711)
It was discovered that the iSCSI block driver in QEMU incorrectly handled
certain memory operations
Ubuntu
QEMU vulnerabilities
vendor_ubuntu·2026-06-09·CVSS 3.8
CVE-2021-3416 [LOW] QEMU vulnerabilities
Title: QEMU vulnerabilities
Summary: Several security issues were fixed in QEMU.
Felipe Franciosi, Raphael Norwitz, and Peter Turschmid discovered that the
iSCSI block driver in QEMU incorrectly handled certain responses from an
iSCSI server. A remote attacker could possibly use this issue to cause QEMU
to crash, resulting in a denial of service, or possibly execute arbitrary
code. This issue only affected Ubuntu 14.04 LTS. (CVE-2020-1711)
It was discovered that the iSCSI block driver in QEMU incorrectly handled
certain memory operations, leading to a heap-based buffer over-read. An
attacker could possibly use this issue to expose sensitive information from
the host. This issue only affected Ubuntu 14.04 LTS. (CVE-2020-11947)
Ziming Zhang discovered that the SM501 display driver in QEM
Ubuntu
QEMU vulnerabilities
vendor_ubuntu·2021-02-08·CVSS 3.8
CVE-2020-15859 [LOW] QEMU vulnerabilities
Title: QEMU vulnerabilities
Summary: Several security issues were fixed in QEMU.
It was discovered that QEMU incorrectly handled memory in iSCSI emulation.
An attacker inside the guest could possibly use this issue to obtain
sensitive information. This issue only affected Ubuntu 16.04 LTS, Ubuntu
18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2020-11947)
Alexander Bulekov discovered that QEMU incorrectly handled Intel e1000e
emulation. An attacker inside the guest could use this issue to cause QEMU
to crash, resulting in a denial of service. (CVE-2020-15859)
Alexander Bulekov discovered that QEMU incorrectly handled memory region
cache. An attacker inside the guest could use this issue to cause QEMU to
crash, resulting in a denial of service. This issue only affected Ubuntu
20.04 LTS, and Ubunt
Red Hat
QEMU: heap buffer overflow in iscsi_aio_ioctl_cb() in block/iscsi.c may lead to information disclosure
vendor_redhat·2020-04-20·CVSS 3.8
CVE-2020-11947 [LOW] CWE-131 QEMU: heap buffer overflow in iscsi_aio_ioctl_cb() in block/iscsi.c may lead to information disclosure
QEMU: heap buffer overflow in iscsi_aio_ioctl_cb() in block/iscsi.c may lead to information disclosure
iscsi_aio_ioctl_cb in block/iscsi.c in QEMU 4.1.0 has a heap-based buffer over-read that may disclose unrelated information from process memory to an attacker.
A heap buffer overflow flaw was found in the iSCSI support of QEMU. This flaw could lead to an out-of-bounds read access and possible information disclosure from the QEMU process memory to a malicious guest. The highest threat from this vulnerability is to data confidentiality.
Statement: This flaw has been rated as having a security impact of Low, and is not currently planned to be addressed in future updates of Red Hat Enterprise Linux 7. Red Hat Enterprise Linux 7 is now in Maintenance Support 2 Phase of the support and maint
Debian
CVE-2020-11947: qemu - iscsi_aio_ioctl_cb in block/iscsi.c in QEMU 4.1.0 has a heap-based buffer over-r...
vendor_debian·2020·CVSS 3.8
CVE-2020-11947 [LOW] CVE-2020-11947: qemu - iscsi_aio_ioctl_cb in block/iscsi.c in QEMU 4.1.0 has a heap-based buffer over-r...
iscsi_aio_ioctl_cb in block/iscsi.c in QEMU 4.1.0 has a heap-based buffer over-read that may disclose unrelated information from process memory to an attacker.
Scope: local
bookworm: resolved (fixed in 1:4.2-7)
bullseye: resolved (fixed in 1:4.2-7)
forky: resolved (fixed in 1:4.2-7)
sid: resolved (fixed in 1:4.2-7)
trixie: resolved (fixed in 1:4.2-7)
GHSA
GHSA-m8w3-4mqx-j486: iscsi_aio_ioctl_cb in block/iscsi
ghsa_unreviewed·2022-05-24
CVE-2020-11947 [MEDIUM] CWE-125 GHSA-m8w3-4mqx-j486: iscsi_aio_ioctl_cb in block/iscsi
iscsi_aio_ioctl_cb in block/iscsi.c in QEMU 4.1.0 has a heap-based buffer over-read that may disclose unrelated information from process memory to an attacker.
OSV
qemu vulnerabilities
osv·2021-02-08·CVSS 3.8
CVE-2020-11947 [LOW] qemu vulnerabilities
qemu vulnerabilities
It was discovered that QEMU incorrectly handled memory in iSCSI emulation.
An attacker inside the guest could possibly use this issue to obtain
sensitive information. This issue only affected Ubuntu 16.04 LTS, Ubuntu
18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2020-11947)
Alexander Bulekov discovered that QEMU incorrectly handled Intel e1000e
emulation. An attacker inside the guest could use this issue to cause QEMU
to crash, resulting in a denial of service. (CVE-2020-15859)
Alexander Bulekov discovered that QEMU incorrectly handled memory region
cache. An attacker inside the guest could use this issue to cause QEMU to
crash, resulting in a denial of service. This issue only affected Ubuntu
20.04 LTS, and Ubuntu 20.10. (CVE-2020-27821)
Cheol-woo Myung discovered that QE
OSV
CVE-2020-11947: iscsi_aio_ioctl_cb in block/iscsi
osv·2020-12-31·CVSS 3.8
CVE-2020-11947 [LOW] CVE-2020-11947: iscsi_aio_ioctl_cb in block/iscsi
iscsi_aio_ioctl_cb in block/iscsi.c in QEMU 4.1.0 has a heap-based buffer over-read that may disclose unrelated information from process memory to an attacker.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
http://www.openwall.com/lists/oss-security/2021/01/13/4https://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=ff0507c239a246fd7215b31c5658fc6a3ee1e4c5https://security.netapp.com/advisory/ntap-20210212-0001/http://www.openwall.com/lists/oss-security/2021/01/13/4https://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=ff0507c239a246fd7215b31c5658fc6a3ee1e4c5https://security.netapp.com/advisory/ntap-20210212-0001/
2020-12-31
Published