CVE-2018-1000204
NOTE: third parties dispute the relevance of this report, noting that the requirement for an attacker to have both the CAP_SYS_ADMIN and CAP_SYS_RAWIO capabilities makes it "virtually impossible to exploit.
Does this matter?
Lower severity and a low EPSS score (1.91%). Track it; it rarely justifies an emergency change on its own.
Description
Linux Kernel version 3.18 to 4.16 incorrectly handles an SG_IO ioctl on /dev/sg0 with dxfer_direction=SG_DXFER_FROM_DEV and an empty 6-byte cmdp. This may lead to copying up to 1000 kernel heap pages to the userspace. This has been fixed upstream in https://github.com/torvalds/linux/commit/a45b599ad808c3c982fdcdc12b0b8611c2f92824 already. The problem has limited scope, as users don't usually have permissions to access SCSI devices. On the other hand, e.g. the Nero user manual suggests doing `chmod o+r+w /dev/sg*` to make the devices accessible. NOTE: third parties dispute the relevance of this report, noting that the requirement for an attacker to have both the CAP_SYS_ADMIN and CAP_SYS_RAWIO capabilities makes it "virtually impossible to exploit.
- CVSS 3.0
- 5.3 MEDIUMCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 1.91% probability · 79th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel · canonical/ubuntu linux · debian/debian linux
- Source
- cve@mitre.org
References
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00043.html
- http://www.openwall.com/lists/oss-security/2018/06/26/3Mailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2948Third Party Advisory
- https://github.com/torvalds/linux/commit/a45b599ad808c3c982fdcdc12b0b8611c2f92824Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00015.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00016.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00020.htmlThird Party Advisory
- https://usn.ubuntu.com/3696-1/Third Party Advisory
- https://usn.ubuntu.com/3696-2/Third Party Advisory
- https://usn.ubuntu.com/3752-1/Third Party Advisory
- https://usn.ubuntu.com/3752-2/Third Party Advisory
- https://usn.ubuntu.com/3752-3/Third Party Advisory
- https://usn.ubuntu.com/3754-1/Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00043.html
- http://www.openwall.com/lists/oss-security/2018/06/26/3Mailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2948Third Party Advisory
- https://github.com/torvalds/linux/commit/a45b599ad808c3c982fdcdc12b0b8611c2f92824Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00015.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00016.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00020.htmlThird Party Advisory
- https://usn.ubuntu.com/3696-1/Third Party Advisory
- https://usn.ubuntu.com/3696-2/Third Party Advisory
- https://usn.ubuntu.com/3752-1/Third Party Advisory
- https://usn.ubuntu.com/3752-2/Third Party Advisory
- https://usn.ubuntu.com/3752-3/Third Party Advisory
- https://usn.ubuntu.com/3754-1/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.