Astra Linux – Vulnerability in Shadow

A vulnerability was discovered in Shadow 4.5. The newgidmap function part of shadow-utils is setuid, allowing an unprivileged user to be placed in a user namespace where setgroups2 is allowed. This enables an attacker to remove themselves from a supplementary group, potentially granting them acce...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: cxl/region: Fixed leakage in constructregion. The first call to sysfsupdategroup requires explicitly freeing the resource, as it is too early for cxlregioniomemrelease to be called...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Improved page fault error reporting If the IOMMU domain for the device group is not properly set up, we may encounter an IOMMU page fault. The current page fault handler assumes that the domain is always set up...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: drm/panthor: Fix for dma-fence safe access rules Commit 506aa8b02a8d6 “dma-fence: Add safe access helpers and document the rules” details the dma-fence safe access rules. The most common issue is that...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: PCI: Endpoint: pci-epf-vntb: Remove duplicate resource teardown The epfntbepcdestroy function duplicates the teardown that the caller is supposed to perform later. This leads to an error when .allowlink fails, or when .droplink i...

Astra Linux – Vulnerability in Systemd

It was discovered that a Systemd service that uses the DynamicUser property can obtain new privileges by executing SUID binaries. This allows the service to create binaries belonging to the transient group, with the setgid bit set. A local attacker could exploit this flaw to access resources that...

Astra Linux – Vulnerability in Qemu

A flaw was discovered in the implementation of the QEMU virtio-fs shared file system daemon virtiofsd. This flaw is strictly related to CVE-2018-13405. A local guest user can create files in directories shared by virtio-fs, with unintended group ownership. This occurs in a scenario where a...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: nexthop: Fixed a division by zero issue when replacing a resilient group. The resilient nexthop group-related torture tests in fibnexthop.sh exposed a possible division by zero issue when replacing a resilient group 1. This...

Astra Linux – Vulnerability in Samba

A flaw was discovered in Samba. The Samba smbd file server must map Windows group identities SIDs to Unix group IDs gids. The code responsible for this mapping contained a flaw that could allow it to read data beyond the end of the array, in the event that a negative cache entry was added to the...

Astra Linux – Vulnerability in Linux 5.15

A use-after-free vulnerability in the Linux Kernel Performance Events system can be exploited to gain local privilege escalation. The perfgroupdetach function did not check the attachstate of the event’s siblings before calling addeventtogroups; moreover, removeonexec allowed calling listdelevent...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: ext4: fixed the bug in ext4writepages We encountered the following issue: EXT4-fs error device loop0: ext4mbgeneratebuddy:1141: group 0, block bitmap and bg descriptor inconsistent: 25 vs 31513 free cls ------------ cut here...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: btrfs: Fixed a hang that occurred during unmount when the block group reclaim task was running. When starting an unmount, at closectree, if the reclaim task is running and is in the middle of a data block group relocation, a...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: ext4: Fixed ext4mbmarkbb with flexbg and fastcommit. In the case of the flexbg feature which is enabled by default, extents for any given inode may span across blocks from two different block groups. ext4mbmarkbb only reads the...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerabilities have been resolved: bfq: Ensure that the bfqg we are queuing requests with is online. BiOS queued into the BFQ IO scheduler can be associated with a cgroup that was already offline. This may lead to the insertion of this bfqgroup into a service...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15

A issue was discovered in the Linux kernel before version 6.3.3. There is an out-of-bounds read in the crc16 function in lib/crc16.c when called from fs/ext4/super.c, because ext4groupdesccsum does not properly check an offset. NOTE: This issue is disputed by third parties, as the kernel is not...

Astra Linux – Vulnerability in Firefox

Parsing an indefinite SEQUENCE within an indefinite GROUP in ASN.1 could result in the parser accepting malformed ASN.1 syntax. This vulnerability affects Firefox versions earlier than 102...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: ext4: Correct group validation in ext4mbgoodgroup. The group corruption check will access memory related to the grp structure. This can lead to a kernel crash if grp is set to NULL. Therefore, perform a NULL check before the...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerability has been resolved: ext4: Avoid allocating blocks from a corrupted group in ext4mbfindbygoal. The logic for checking whether the block bitmap of the group is corrupted is now placed under the protection of the group lock, thereby avoiding the...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: mlxsw: spectrumacltcam: Fixed stack corruption When tc filters are first added to a network device, the corresponding local port is bound to an ACL group within the device. This group contains a list of ACLs. Each ACL points t...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: iio: core: fix a memory leak in iiodeviceregistersysfs When iiodeviceregistersysfsgroup fails, we should free iiodevopaque-chanattrgroup.attrs to prevent potential memory leaks...