Auth bypass in Linux Kernel
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 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.
Vulnerability class: Broken Access Control
EPSS: 0.004 (34.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Linux Linux_kernel
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (x_refsource_CONFIRM, Patch, Issue Tracking)
- cve@mitre.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
- cve@mitre.org (x_refsource_UBUNTU, vendor-advisory)
- cve@mitre.org (x_refsource_UBUNTU, vendor-advisory)
- cve@mitre.org (vendor-advisory, x_refsource_DEBIAN)
- cve@mitre.org (x_refsource_UBUNTU, vendor-advisory)
- cve@mitre.org (mailing-list, x_refsource_MLIST)
- cve@mitre.org (x_refsource_UBUNTU, vendor-advisory)
- cve@mitre.org (x_refsource_UBUNTU, vendor-advisory)
- cve@mitre.org (x_refsource_CONFIRM, Patch, Issue Tracking)
Frequently asked questions
- What is CVE-2017-17807?
- CVE-2017-17807 is a low-severity vulnerability in Linux Kernel, classified under Missing Authorization. CVSS score: 3.3/10. Published 2017-12-20.
- How severe is CVE-2017-17807?
- Low severity. CVSS v3 base score is 3.3 out of 10.
- Is CVE-2017-17807 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.