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CVE-2021-27363

Status Candidate

Overview

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.

Related Files

Red Hat Security Advisory 2021-1531-01
Posted May 11, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1531-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include buffer overflow, out of bounds read, and out of bounds write vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2019-19532, CVE-2020-25211, CVE-2020-25705, CVE-2020-28374, CVE-2021-27363, CVE-2021-27364, CVE-2021-27365
SHA-256 | 342af24d3706d582f6305539e856e3a55e0bebe3466915e1c717cfb30a19713c
Red Hat Security Advisory 2021-1429-01
Posted May 6, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1429-01 - Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. Issues addressed include an XML injection vulnerability.

tags | advisory
systems | linux, redhat
advisories | CVE-2020-25649, CVE-2021-20305, CVE-2021-2163, CVE-2021-27363, CVE-2021-27364, CVE-2021-27365, CVE-2021-3347, CVE-2021-3447
SHA-256 | 080261f12c95415e46d2e885ab13d75245d27a7ac95fd992cb11dd540475be30
Red Hat Security Advisory 2021-1448-01
Posted Apr 29, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1448-01 - Red Hat Advanced Cluster Management for Kubernetes 2.0.10 images Red Hat Advanced Cluster Management for Kubernetes provides the capabilities to address common challenges that administrators and site reliability engineers face as they work across a range of public and private cloud environments. Clusters and applications are all visible and managed from a single console—with security policy built in. This advisory contains the container images for Red Hat Advanced Cluster Management for Kubernetes, which resolve some security issues and bugs. Issues addressed include a code execution vulnerability.

tags | advisory, code execution
systems | linux, redhat
advisories | CVE-2020-0466, CVE-2020-15586, CVE-2020-16845, CVE-2020-27152, CVE-2020-28362, CVE-2020-28374, CVE-2021-20305, CVE-2021-23358, CVE-2021-26708, CVE-2021-27363, CVE-2021-27364, CVE-2021-27365, CVE-2021-3347, CVE-2021-3449, CVE-2021-3450
SHA-256 | e0ed9dcea65dc8c6aed72a7323bfdf194a8e68c45019b280ca356c117d319f9c
Red Hat Security Advisory 2021-1376-01
Posted Apr 27, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1376-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include buffer overflow, out of bounds read, and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2020-15436, CVE-2020-28374, CVE-2021-27363, CVE-2021-27364, CVE-2021-27365
SHA-256 | 240032e93bcb7b4ed0735232f82e3b09c775facff14f3a3bea7b130dd3b6a555
Red Hat Security Advisory 2021-1373-01
Posted Apr 27, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1373-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include buffer overflow and out of bounds read vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2021-27363, CVE-2021-27364, CVE-2021-27365
SHA-256 | 1f4d9d0e249812a79e1d8846ca1ee2bd1ed40eb3dd88b4c6ea3ae28227ac7239
Red Hat Security Advisory 2021-1369-01
Posted Apr 26, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1369-01 - Red Hat Advanced Cluster Management for Kubernetes 2.1.6 images Red Hat Advanced Cluster Management for Kubernetes provides the capabilities to address common challenges that administrators and site reliability engineers face as they work across a range of public and private cloud environments. Clusters and applications are all visible and managed from a single console—with security policy built in. This advisory contains the container images for Red Hat Advanced Cluster Management for Kubernetes, which fix several bugs and security issues.

tags | advisory
systems | linux, redhat
advisories | CVE-2020-0466, CVE-2020-14040, CVE-2020-27152, CVE-2020-28374, CVE-2020-35149, CVE-2021-20218, CVE-2021-20305, CVE-2021-26708, CVE-2021-27363, CVE-2021-27364, CVE-2021-27365, CVE-2021-3121, CVE-2021-3347, CVE-2021-3449, CVE-2021-3450
SHA-256 | 019fe35bad08451966b333b48fcaaaf15597ee545c7cbbff9ea4261482d338df
Red Hat Security Advisory 2021-1289-01
Posted Apr 20, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1289-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include buffer overflow and out of bounds read vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2021-27363, CVE-2021-27364, CVE-2021-27365
SHA-256 | 1e96302895692c9b0b8a92fde4ae595a9e423236811fe1c45255a7d1ae4122f8
Red Hat Security Advisory 2021-1272-01
Posted Apr 20, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1272-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include buffer overflow, out of bounds read, and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2021-27363, CVE-2021-27364, CVE-2021-27365, CVE-2021-3347
SHA-256 | bfa6496841ee1542d7ef708aa85e207819c0b0b16efa6615342e515334574151
Red Hat Security Advisory 2021-1279-01
Posted Apr 20, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1279-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include buffer overflow, out of bounds read, and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2021-27363, CVE-2021-27364, CVE-2021-27365, CVE-2021-3347
SHA-256 | 06958093299fa651850055c7fa9da79e2749b53f718ef6c16c055427660fd868
Red Hat Security Advisory 2021-1267-01
Posted Apr 20, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1267-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include buffer overflow, out of bounds read, and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2020-14351, CVE-2021-27363, CVE-2021-27364, CVE-2021-27365
SHA-256 | 852eba6751ddd66508e851c03236045ae5401c6808fde942430dec587e1b9abc
Red Hat Security Advisory 2021-1171-01
Posted Apr 13, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1171-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include buffer overflow and out of bounds read vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2021-27363, CVE-2021-27364, CVE-2021-27365
SHA-256 | 860dbe3265e6dd60504dc28191f8e0d0d6bad6980f8ae9f1ea7c683306955c26
Red Hat Security Advisory 2021-1168-01
Posted Apr 13, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1168-01 - Red Hat Advanced Cluster Management for Kubernetes 2.2.2 images Red Hat Advanced Cluster Management for Kubernetes provides the capabilities to address common challenges that administrators and site reliability engineers face as they work across a range of public and private cloud environments. Clusters and applications are all visible and managed from a single console-with security policy built in. This advisory contains the container images for Red Hat Advanced Cluster Management for Kubernetes, which fix several bugs and security issues. Issues addressed include code execution, denial of service, integer overflow, and null pointer vulnerabilities.

tags | advisory, denial of service, overflow, vulnerability, code execution
systems | linux, redhat
advisories | CVE-2020-0466, CVE-2020-14040, CVE-2020-27152, CVE-2020-28374, CVE-2020-28500, CVE-2020-28851, CVE-2020-28852, CVE-2020-29529, CVE-2021-21321, CVE-2021-21322, CVE-2021-23337, CVE-2021-23840, CVE-2021-23841, CVE-2021-26708, CVE-2021-27363, CVE-2021-27364, CVE-2021-27365, CVE-2021-3121, CVE-2021-3347, CVE-2021-3449, CVE-2021-3450
SHA-256 | cfc0ee4720a885efcdbb629dc90451c511ea3b56ea59530b3ab8554fa0475c01
Kernel Live Patch Security Notice LSN-0075-1
Posted Apr 7, 2021
Authored by Benjamin M. Romer

Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not properly apply speculative execution limits on some pointer types. A local attacker could use this to expose sensitive information (kernel memory). It was discovered that the memory management subsystem in the Linux kernel did not properly handle copy-on-write operations in some situations. A local attacker could possibly use this to gain unintended write access to read-only memory pages. Various other issues were also addressed.

tags | advisory, kernel, local
systems | linux
advisories | CVE-2020-27170, CVE-2020-27171, CVE-2020-29372, CVE-2020-29374, CVE-2021-27363, CVE-2021-27364, CVE-2021-27365, CVE-2021-3444
SHA-256 | 469cc31bae7443b09e56a62b4aac4c6a731592910bda9c7097efee0cfc5ebb11
Ubuntu Security Notice USN-4901-1
Posted Apr 7, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4901-1 - 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 or possibly execute arbitrary code. 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. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-28374, CVE-2021-27363, CVE-2021-27364, CVE-2021-27365
SHA-256 | 6d1fd34ada85522e50965e160e5c5eef31b6ea21b01517798c6cc78c4cbd7ac9
Red Hat Security Advisory 2021-1093-01
Posted Apr 7, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1093-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include buffer overflow, out of bounds read, and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2020-0466, CVE-2020-27152, CVE-2020-28374, CVE-2021-26708, CVE-2021-27363, CVE-2021-27364, CVE-2021-27365, CVE-2021-3347
SHA-256 | 059ac98f927be53cb34bfbcaf019e55b9c1f39acbc7086390533a8aeb6488dfa
Red Hat Security Advisory 2021-1081-01
Posted Apr 7, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1081-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include buffer overflow, out of bounds read, and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2020-0466, CVE-2020-27152, CVE-2020-28374, CVE-2021-26708, CVE-2021-27363, CVE-2021-27364, CVE-2021-27365, CVE-2021-3347
SHA-256 | aef5b23a4fe73958169e2989069fbdd8e0bd4e5e24e1ccfe2f32980af659f93e
Red Hat Security Advisory 2021-1071-01
Posted Apr 6, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1071-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include buffer overflow and out of bounds read vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2021-27363, CVE-2021-27364, CVE-2021-27365
SHA-256 | 8cd7f2abb6410c72c804244553fd7e457a52e483fb44cd1b8e4d9906b954d929
Red Hat Security Advisory 2021-1070-01
Posted Apr 6, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1070-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include buffer overflow and out of bounds read vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2021-27363, CVE-2021-27364, CVE-2021-27365
SHA-256 | 53c1994fc8e0de5ed7ff5f05a19baca2a2dd5c3a8b2178685005e5cc28d942a7
Ubuntu Security Notice USN-4889-1
Posted Mar 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4889-1 - 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 or possibly execute arbitrary code. 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. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-27363, CVE-2021-27364, CVE-2021-27365
SHA-256 | 653279eb941dc520055abdba149fa888738b66335b33c06e2165860bcea77fd4
Ubuntu Security Notice USN-4887-1
Posted Mar 24, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4887-1 - 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 or possibly execute arbitrary code. 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 or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-27170, CVE-2020-27171, CVE-2021-27363, CVE-2021-27364, CVE-2021-27365, CVE-2021-3444
SHA-256 | 9a06c7465cb26d1b56d2a8903cc4d503a19d30e3db18b40322b2ce482b14f4f4
Ubuntu Security Notice USN-4883-1
Posted Mar 22, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4883-1 - 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 or possibly execute arbitrary code. 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. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-27363, CVE-2021-27364, CVE-2021-27365
SHA-256 | d29d80374cb667f159382aded40ea914c42d0a84ad22af17e1dc69adb813beb8
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