CVE-2021-27363
published 2021-03-07CVE-2021-27363: An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When…
PriorityP418medium4.4CVSS 3.1
AVLACLPRLUINSUCLINAL
EPSS
0.71%
50.1th percentile
An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI subsystem, the transport's handle is available to unprivileged users via the sysfs file system, at /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the pointer to an iscsi_transport struct in the kernel module's global variables.
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | linux | < linux 5.10.24-1 (bookworm) | linux 5.10.24-1 (bookworm) |
| linux | linux_kernel | <= 5.11.3 | — |
| linux | linux_kernel | >= 0 < 5.10.24-1 | 5.10.24-1 |
| linux | linux_kernel | >= 0 < 5.10.24-1 | 5.10.24-1 |
| linux | linux_kernel | >= 0 < 5.10.24-1 | 5.10.24-1 |
| linux | linux_kernel | >= 0 < 5.10.24-1 | 5.10.24-1 |
| linux | linux_kernel | >= 0 < 4.4.0-206.238 | 4.4.0-206.238 |
| linux | linux_kernel | >= 0 < 4.15.0-139.143 | 4.15.0-139.143 |
| linux | linux_kernel | >= 0 < 5.4.0-70.78 | 5.4.0-70.78 |
| linux | linux_kernel | >= 0 < 3.13.0-185.236 | 3.13.0-185.236 |
| msrc | cbl2_kernel_5.10.78.1-1_on_cbl_mariner_2.0 | — | — |
CVSS provenance
nvdv3.14.4MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
nvdv2.03.6LOWAV:L/AC:L/Au:N/C:P/I:N/A:P
osv4.7MEDIUM
vendor_ubuntu8.1HIGH
vendor_debian4.4MEDIUM
vendor_msrc4.4MEDIUM
vendor_redhat4.4MEDIUM
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Ubuntu
Linux kernel (Trusty HWE) vulnerabilities
vendor_ubuntu·2021-04-06·CVSS 8.1
CVE-2021-27365 [HIGH] Linux kernel (Trusty HWE) vulnerabilities
Title: Linux kernel (Trusty HWE) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Adam Nichols discovered that heap overflows existed in the iSCSI subsystem
in the Linux kernel. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2021-27365)
It was discovered that the LIO SCSI target implementation in the Linux
kernel performed insufficient identifier checking in certain XCOPY
requests. An attacker with access to at least one LUN in a multiple
backstore environment could use this to expose sensitive information or
modify data. (CVE-2020-28374)
Adam Nichols discovered that the iSCSI subsystem in the Linux kernel did
not properly restrict access to iSCSI transport handles. A local attacker
co
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2021-03-29·CVSS 4.4
CVE-2021-27365 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Adam Nichols discovered that heap overflows existed in the iSCSI subsystem
in the Linux kernel. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2021-27365)
Adam Nichols discovered that the iSCSI subsystem in the Linux kernel did
not properly restrict access to iSCSI transport handles. A local attacker
could use this to cause a denial of service or expose sensitive information
(kernel pointer addresses). (CVE-2021-27363)
Adam Nichols discovered that an out-of-bounds read existed in the iSCSI
subsystem in the Linux kernel. A local attacker could use this to cause a
denial of service (system crash) or expose sensitive inf
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2021-03-25·CVSS 4.4
CVE-2021-27363 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Adam Nichols discovered that heap overflows existed in the iSCSI subsystem
in the Linux kernel. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2021-27365)
Adam Nichols discovered that the iSCSI subsystem in the Linux kernel did
not properly restrict access to iSCSI transport handles. A local attacker
could use this to cause a denial of service or expose sensitive information
(kernel pointer addresses). (CVE-2021-27363)
Adam Nichols discovered that an out-of-bounds read existed in the iSCSI
subsystem in the Linux kernel. A local attacker could use this to cause a
denial of service (system crash) or expose sensitive inf
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2021-03-23·CVSS 4.7
CVE-2020-27170 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
De4dCr0w of 360 Alpha Lab discovered that the BPF verifier in the Linux
kernel did not properly handle mod32 destination register truncation when
the source register was known to be 0. A local attacker could use this to
expose sensitive information (kernel memory) or possibly execute arbitrary
code. (CVE-2021-3444)
Adam Nichols discovered that heap overflows existed in the iSCSI subsystem
in the Linux kernel. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2021-27365)
Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not
properly compute a speculative execution limit on pointer arithmetic in
some
Microsoft
An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the
vendor_msrc·2021-03-09·CVSS 4.4
CVE-2021-27363 [MEDIUM] An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the
An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI subsystem the transport's handle is available to unprivileged users via the sysfs file system at /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read the show_transport_handle function (in drivers/scsi/scsi_transport_iscsi.c) is called which leaks the handle. This handle is actually the pointer to an iscsi_transport struct in the kernel module's global variables.
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Li
Red Hat
kernel: iscsi: unrestricted access to sessions and handles
vendor_redhat·2021-03-05·CVSS 4.4
CVE-2021-27363 [MEDIUM] CWE-200 kernel: iscsi: unrestricted access to sessions and handles
kernel: iscsi: unrestricted access to sessions and handles
An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI subsystem, the transport's handle is available to unprivileged users via the sysfs file system, at /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the pointer to an iscsi_transport struct in the kernel module's global variables.
A flaw was found in the way access to sessions and handles was handled in the iSCSI driver in the Linux kernel. A local user could use this flaw to leak iS
Debian
CVE-2021-27363: linux - An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer lea...
vendor_debian·2021·CVSS 4.4
CVE-2021-27363 [MEDIUM] CVE-2021-27363: linux - An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer lea...
An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI subsystem, the transport's handle is available to unprivileged users via the sysfs file system, at /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the pointer to an iscsi_transport struct in the kernel module's global variables.
Scope: local
bookworm: resolved (fixed in 5.10.24-1)
bullseye: resolved (fixed in 5.10.24-1)
forky: resolved (fixed in 5.10.24-1)
sid: resolved (fixed in 5.10.24-1)
trixie: resolved (fixed in 5.10.24-1)
GHSA
GHSA-ghrr-3969-mcfp: An issue was discovered in the Linux kernel through 5
ghsa_unreviewed·2022-05-24
CVE-2021-27363 [MEDIUM] GHSA-ghrr-3969-mcfp: An issue was discovered in the Linux kernel through 5
An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI subsystem, the transport's handle is available to unprivileged users via the sysfs file system, at /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the pointer to an iscsi_transport struct in the kernel module's global variables.
OSV
linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities
osv·2021-03-29·CVSS 4.4
CVE-2021-27365 [MEDIUM] linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities
linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities
Adam Nichols discovered that heap overflows existed in the iSCSI subsystem
in the Linux kernel. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2021-27365)
Adam Nichols discovered that the iSCSI subsystem in the Linux kernel did
not properly restrict access to iSCSI transport handles. A local attacker
could use this to cause a denial of service or expose sensitive information
(kernel pointer addresses). (CVE-2021-27363)
Adam Nichols discovered that an out-of-bounds read existed in the iSCSI
subsystem in the Linux kernel. A local attacker could use
OSV
linux, linux-lts-xenial vulnerabilities
osv·2021-03-25·CVSS 4.4
CVE-2021-27365 [MEDIUM] linux, linux-lts-xenial vulnerabilities
linux, linux-lts-xenial vulnerabilities
Adam Nichols discovered that heap overflows existed in the iSCSI subsystem
in the Linux kernel. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2021-27365)
Adam Nichols discovered that the iSCSI subsystem in the Linux kernel did
not properly restrict access to iSCSI transport handles. A local attacker
could use this to cause a denial of service or expose sensitive information
(kernel pointer addresses). (CVE-2021-27363)
Adam Nichols discovered that an out-of-bounds read existed in the iSCSI
subsystem in the Linux kernel. A local attacker could use this to cause a
denial of service (system crash) or expose sensitive information (kernel
memory). (CVE-2021-27364)
OSV
linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke-5.3, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe, linux-hwe-5.4, linux-hwe-5.8, linux-kvm,
osv·2021-03-23·CVSS 4.7
[MEDIUM] linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke-5.3, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe, linux-hwe-5.4, linux-hwe-5.8, linux-kvm,
linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke-5.3, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe, linux-hwe-5.4, linux-hwe-5.8, linux-kvm, linux-oem-5.10, linux-oem-5.6, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4, linux-raspi2-5.3 vulnerabilities
De4dCr0w of 360 Alpha Lab discovered that the BPF verifier in the Linux
kernel did not properly handle mod32 destination register truncation when
the source register was known to be 0. A local attacker could use this to
expose sensitive information (kernel memory) or possibly execute arbitrary
code. (CVE-2021-3444)
Adam Nichols discovered that heap overflows existed in the iSCSI subsystem
in the Linux kernel. A local attacker could use this to cause a denial of
servi
OSV
CVE-2021-27363: An issue was discovered in the Linux kernel through 5
osv·2021-03-07·CVSS 4.4
CVE-2021-27363 [MEDIUM] CVE-2021-27363: An issue was discovered in the Linux kernel through 5
An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI subsystem, the transport's handle is available to unprivileged users via the sysfs file system, at /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the pointer to an iscsi_transport struct in the kernel module's global variables.
No detection rules found.
No public exploits indexed.
http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.htmlhttp://www.openwall.com/lists/oss-security/2021/03/06/1https://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.htmlhttps://bugzilla.suse.com/show_bug.cgi?id=1182716https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=688e8128b7a92df982709a4137ea4588d16f24aahttps://lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlhttps://lists.debian.org/debian-lts-announce/2021/03/msg00035.htmlhttps://security.netapp.com/advisory/ntap-20210409-0001/http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.htmlhttp://www.openwall.com/lists/oss-security/2021/03/06/1https://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.htmlhttps://bugzilla.suse.com/show_bug.cgi?id=1182716https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=688e8128b7a92df982709a4137ea4588d16f24aahttps://lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlhttps://lists.debian.org/debian-lts-announce/2021/03/msg00035.htmlhttps://security.netapp.com/advisory/ntap-20210409-0001/
2021-03-07
Published