The BPF_S_ANC_NLATTR_NEST extension implementation in the sk_run_filter function in net/core/filter.c in the Linux kernel through 3.14.3 uses the reverse order in a certain subtraction, which allows local users to cause a denial of service (over-read and system crash) via crafted BPF instructions. NOTE: the affected code was moved to the __skb_get_nlattr_nest function before the vulnerability was announced.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2014-3145 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue does not affect the version of the kernel package as shipped with Red Hat Enterprise Linux 5.
Base Score | 5.4 |
---|---|
Base Metrics | AV:L/AC:M/Au:N/C:P/I:N/A:C |
Access Vector | Local |
Access Complexity | Medium |
Authentication | None |
Confidentiality Impact | Partial |
Integrity Impact | None |
Availability Impact | Complete |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
Platform | Errata | Release Date |
---|---|---|
Red Hat Enterprise Linux 6 (kernel) | RHSA-2014:0981 | 2014-07-29 |
Red Hat Enterprise Linux 7 (kernel) | RHSA-2014:0786 | 2014-06-24 |
Red Hat MRG Grid for RHEL 6 Server v.2 (kernel-rt) | RHSA-2014:0913 | 2014-07-22 |
Platform | Package | State |
---|---|---|
Red Hat Enterprise Linux 5 | kernel | Not affected |