UBUNTU-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 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.
02 / AFFECTED SOFTWARE
Affected packages
120 explicit affected versions
30 explicit affected versions
52 explicit affected versions
10 explicit affected versions
8 explicit affected versions
17 explicit affected versions
28 explicit affected versions
25 explicit affected versions
44 explicit affected versions
38 explicit affected versions
43 explicit affected versions
10 explicit affected versions
50 explicit affected versions
26 explicit affected versions
51 explicit affected versions
6 explicit affected versions
12 explicit affected versions
1 explicit affected versions
1 explicit affected versions
23 explicit affected versions
7 explicit affected versions
7 explicit affected versions
8 explicit affected versions
7 explicit affected versions
1 explicit affected versions
61 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ee8f844e3c5a73b999edf733df1c529d6503ec2f
- https://ubuntu.com/security/CVE-2016-9604
- https://ubuntu.com/security/notices/USN-3312-1
- https://ubuntu.com/security/notices/USN-3312-2
- https://ubuntu.com/security/notices/USN-3314-1
- https://ubuntu.com/security/notices/USN-3361-1
- https://ubuntu.com/security/notices/USN-3422-1
- https://ubuntu.com/security/notices/USN-3422-2
- https://www.cve.org/CVERecord?id=CVE-2016-9604