CVE-2017-17807
The KEYS subsystem in the Linux kernel before 4.14.6 omitted an access-control check when adding a key to the current task's "default request-key keyring" via the request_key() system call, allowing a local user to use a sequence of crafted system calls…
Does this matter?
Lower severity and a low EPSS score (0.42%). Track it; it rarely justifies an emergency change on its own.
Description
The KEYS subsystem in the Linux kernel before 4.14.6 omitted an access-control check when adding a key to the current task's "default request-key keyring" via the request_key() system call, allowing a local user to use a sequence of crafted system calls to add keys to a keyring with only Search permission (not Write permission) to that keyring, related to construct_get_dest_keyring() in security/keys/request_key.c.
- CVSS 3.0
- 3.3 LOWCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- EPSS
- 0.42% probability · 35th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-862
- Affected
- linux/linux kernel
- Source
- cve@mitre.org
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4dca6ea1d9432052afb06baf2e3ae78188a4410bIssue Tracking, Patch
- http://www.securityfocus.com/bid/102301Third Party Advisory, VDB Entry
- https://github.com/torvalds/linux/commit/4dca6ea1d9432052afb06baf2e3ae78188a4410bIssue Tracking, Patch
- https://lists.debian.org/debian-lts-announce/2018/01/msg00004.html
- https://usn.ubuntu.com/3617-1/
- https://usn.ubuntu.com/3617-2/
- https://usn.ubuntu.com/3617-3/
- https://usn.ubuntu.com/3619-1/
- https://usn.ubuntu.com/3619-2/
- https://usn.ubuntu.com/3620-1/
- https://usn.ubuntu.com/3620-2/
- https://usn.ubuntu.com/3632-1/
- https://www.debian.org/security/2017/dsa-4073Third Party Advisory
- https://www.debian.org/security/2018/dsa-4082
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.6Issue Tracking, Mailing List, Release Notes
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4dca6ea1d9432052afb06baf2e3ae78188a4410bIssue Tracking, Patch
- http://www.securityfocus.com/bid/102301Third Party Advisory, VDB Entry
- https://github.com/torvalds/linux/commit/4dca6ea1d9432052afb06baf2e3ae78188a4410bIssue Tracking, Patch
- https://lists.debian.org/debian-lts-announce/2018/01/msg00004.html
- https://usn.ubuntu.com/3617-1/
- https://usn.ubuntu.com/3617-2/
- https://usn.ubuntu.com/3617-3/
- https://usn.ubuntu.com/3619-1/
- https://usn.ubuntu.com/3619-2/
- https://usn.ubuntu.com/3620-1/
- https://usn.ubuntu.com/3620-2/
- https://usn.ubuntu.com/3632-1/
- https://www.debian.org/security/2017/dsa-4073Third Party Advisory
- https://www.debian.org/security/2018/dsa-4082
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.6Issue Tracking, Mailing List, Release Notes
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.