vulnwire
4.4med

CVE-2016-9604

It was discovered in the Linux kernel before 4.11-rc8 that root can gain direct access to an internal keyring, such as '.dns_resolver' in R…

Published 8 y ago · modified 4 mo ago · JSON

CVSS
4.4
v3.0 · CNA
CISA KEV
No
not known exploited
EPSS
0.3%
percentile 19%
Public exploits
0
none known

It was discovered in the Linux kernel before 4.11-rc8 that root can gain direct access to an internal keyring, such as '.dns_resolver' in RHEL-7 or '.builtin_trusted_keys' upstream, by joining it as its session keyring. This allows root to bypass module signature verification by adding a new public key of its own devising to the keyring.

Exploit prediction (EPSS)

0.27% probability of exploitation in the next 30 days, higher than 19% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
CNA3.04.4CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
CNA3.04.4CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
NVD3.04.4CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
NVD2.02.1AV:L/AC:L/Au:N/C:N/I:P/A:N

Affected products

  • kernel security

Classification

Weakness
  • CWE-732 Incorrect Permission Assignment for Critical Resource
  • CWE-347 Improper Verification of Cryptographic Signature
Technology feeds
Linux kernel (RSS, critical only)

References

  • git.kernel.org /pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ee8f844e3c5a73b999edf733df1c529d65 · x_refsource_CONFIRM, x_transferred
  • access.redhat.com /errata/RHSA-2017:2669 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • bugzilla.redhat.com /show_bug.cgi?id=CVE-2016-9604 · x_refsource_CONFIRM, x_transferred
  • bugzilla.novell.com /show_bug.cgi?id=1035576 · x_refsource_CONFIRM, x_transferred
  • people.canonical.com /~ubuntu-security/cve/2016/CVE-2016-9604.html · x_refsource_CONFIRM, x_transferred
  • securityfocus.com /bid/102135 · vdb-entry, x_refsource_BID, x_transferred
  • access.redhat.com /errata/RHSA-2017:2077 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • access.redhat.com /errata/RHSA-2017:1842 · vendor-advisory, x_refsource_REDHAT, x_transferred

Sources

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.