CVE-2018-7755
An attacker can send the FDGETPRM ioctl and use the obtained kernel pointer to discover the location of kernel code and data and bypass kernel security protections such as KASLR.
Does this matter?
Lower severity and a low EPSS score (0.67%). Track it; it rarely justifies an emergency change on its own.
Description
An issue was discovered in the fd_locked_ioctl function in drivers/block/floppy.c in the Linux kernel through 4.15.7. The floppy driver will copy a kernel pointer to user memory in response to the FDGETPRM ioctl. An attacker can send the FDGETPRM ioctl and use the obtained kernel pointer to discover the location of kernel code and data and bypass kernel security protections such as KASLR.
- CVSS 3.0
- 5.5 MEDIUMCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.67% probability · 50th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-200
- Affected
- linux/linux kernel · canonical/ubuntu linux
- Source
- cve@mitre.org
References
- https://access.redhat.com/errata/RHSA-2019:2029
- https://access.redhat.com/errata/RHSA-2019:2043
- https://lists.debian.org/debian-lts-announce/2018/10/msg00003.html
- https://lkml.org/lkml/2018/3/7/1116Exploit, Third Party Advisory
- https://usn.ubuntu.com/3695-1/Third Party Advisory
- https://usn.ubuntu.com/3695-2/Third Party Advisory
- https://usn.ubuntu.com/3696-1/Third Party Advisory
- https://usn.ubuntu.com/3696-2/Third Party Advisory
- https://usn.ubuntu.com/3697-1/Third Party Advisory
- https://usn.ubuntu.com/3697-2/Third Party Advisory
- https://usn.ubuntu.com/3698-1/Third Party Advisory
- https://usn.ubuntu.com/3698-2/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4308
- https://access.redhat.com/errata/RHSA-2019:2029
- https://access.redhat.com/errata/RHSA-2019:2043
- https://lists.debian.org/debian-lts-announce/2018/10/msg00003.html
- https://lkml.org/lkml/2018/3/7/1116Exploit, Third Party Advisory
- https://usn.ubuntu.com/3695-1/Third Party Advisory
- https://usn.ubuntu.com/3695-2/Third Party Advisory
- https://usn.ubuntu.com/3696-1/Third Party Advisory
- https://usn.ubuntu.com/3696-2/Third Party Advisory
- https://usn.ubuntu.com/3697-1/Third Party Advisory
- https://usn.ubuntu.com/3697-2/Third Party Advisory
- https://usn.ubuntu.com/3698-1/Third Party Advisory
- https://usn.ubuntu.com/3698-2/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4308
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.