(RHSA-2021:3703) Moderate: virt:av and virt-devel:av security and bug fix update

The Advanced Virtualization module provides the user-space component for running virtual machines that use KVM in environments managed by Red Hat products.

Security Fix(es):

• QEMU: usbredir: free() call on invalid pointer in bufp_alloc() (CVE-2021-3682)

• ntfs-3g: Out-of-bounds heap buffer access in ntfs_get_attribute_value() due to incorrect check of bytes_in_use value in MFT records (CVE-2021-33285)

• ntfs-3g: Heap buffer overflow triggered by a specially crafted Unicode string (CVE-2021-33286)

• ntfs-3g: Heap buffer overflow in ntfs_attr_pread_i() triggered by specially crafted NTFS attributes (CVE-2021-33287)

• ntfs-3g: Heap buffer overflow triggered by a specially crafted MFT section (CVE-2021-33289)

• ntfs-3g: Heap buffer overflow triggered by a specially crafted NTFS inode pathname (CVE-2021-35266)

• ntfs-3g: Stack buffer overflow triggered when correcting differences between MFT and MFTMirror sections (CVE-2021-35267)

• ntfs-3g: Heap buffer overflow in ntfs_inode_real_open() triggered by a specially crafted NTFS inode (CVE-2021-35268)

• ntfs-3g: Heap buffer overflow in ntfs_attr_setup_flag() triggered by a specially crafted NTFS attribute from MFT (CVE-2021-35269)

• ntfs-3g: NULL pointer dereference in ntfs_extent_inode_open() (CVE-2021-39251)

• ntfs-3g: Out-of-bounds read in ntfs_ie_lookup() (CVE-2021-39252)

• ntfs-3g: Out-of-bounds read in ntfs_runlists_merge_i() (CVE-2021-39253)

• ntfs-3g: Integer overflow in memmove() leading to heap buffer overflow in ntfs_attr_record_resize() (CVE-2021-39254)

• ntfs-3g: Out-of-bounds read ntfs_attr_find_in_attrdef() triggered by an invalid attribute (CVE-2021-39255)

• ntfs-3g: Heap buffer overflow in ntfs_inode_lookup_by_name() (CVE-2021-39256)

• ntfs-3g: Endless recursion from ntfs_attr_pwrite() triggered by an unallocated bitmap (CVE-2021-39257)

• ntfs-3g: Out-of-bounds reads in ntfs_attr_find() and ntfs_external_attr_find() (CVE-2021-39258)

• ntfs-3g: Out-of-bounds access in ntfs_inode_lookup_by_name() caused by an unsanitized attribute length (CVE-2021-39259)

• ntfs-3g: Out-of-bounds access in ntfs_inode_sync_standard_information() (CVE-2021-39260)

• ntfs-3g: Heap buffer overflow in ntfs_compressed_pwrite() (CVE-2021-39261)

• ntfs-3g: Out-of-bounds access in ntfs_decompress() (CVE-2021-39262)

• ntfs-3g: Heap buffer overflow in ntfs_get_attribute_value() caused by an unsanitized attribute (CVE-2021-39263)

• QEMU: net: Infinite loop in loopback mode may lead to stack overflow (CVE-2021-3416)

• libvirt: Insecure sVirt label generation (CVE-2021-3631)

• libvirt: Improper locking on ACL failure in virStoragePoolLookupByTargetPath API (CVE-2021-3667)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

• SAP/3TB VM migration slowness [idle db] (BZ#1984458)

• Detecting TSC timer frequencies requires too many privileges (BZ#1996130)