SB2016071238 - Fedora 24 update for kernel

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Man-in-the-middle attack (CVE-ID: CVE-2016-5696)

The vulnerability allows a remote attacker to write arbitrary files and cause DoS condition on the target system.

The weakness exists due to an error in net/ipv4/tcp_input.c while determining the rate of challenge ACK segments. A remote attacker can perform man-in-the-middle attack and hijack TCP sessions via a blind in-window attack.

2) Out-of-bounds read (CVE-ID: CVE-2016-6156)

The vulnerability allows a local non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to an out-of-bounds read error within the ec_device_ioctl_xcmd() function in drivers/platform/chrome/cros_ec_dev.c. A local non-authenticated attacker can perform a denial of service (DoS) attack.

3) Improper access control (CVE-ID: CVE-2016-1237)

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to improper access control error within the nfsd4_set_nfs4_acl() function in fs/nfsd/nfs4acl.c, within the nfsd3_proc_setacl() function in fs/nfsd/nfs3acl.c, within the nfsacld_proc_setacl() and posix_acl_release() functions in fs/nfsd/nfs2acl.c. A local user can gain access to sensitive information.

4) Heap-based buffer overflow (CVE-ID: CVE-2016-5829)

The vulnerability allows a local attacker to cause DoS condition or gain elevated privileges on the target system.

The weakness exists in the hiddev_ioctl_usage function in drivers/hid/usbhid/hiddev.c  due to heap-based buffer overflow. A local attacker can cause the service to crash or gain elevated privileges via a crafted (1) HIDIOCGUSAGES or (2) HIDIOCSUSAGES ioctl call.

Remediation

Install update from vendor's website.

References

• https://bodhi.fedoraproject.org/updates/FEDORA-2016-9a16b2e14e