CVE-2012-2663
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2012-2663 from the MITRE CVE dictionary dictionary and NIST NVD.
Statement
This issue does affect Red Hat Enterprise Linux 5 and 6.
The risks in breaking compatability associated with fixing this flaw outweigh the benefits of the fix, therefore Red Hat does not plan to fix this flaw in Red Hat Enterprise Linux 5 and 6.
Please note that the remote DoS issue in the way how Linux kernel treats SYN+FIN flags set is being handled under different CVE, CVE-2012-6638, and is planned to be fixed in all affected Red Hat Enterprise Linux releases.
CVSS v2 metrics
NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.
| Base Score | 6.4 |
|---|---|
| Base Metrics | AV:N/AC:L/Au:N/C:P/I:N/A:P |
| Access Vector | Network |
| Access Complexity | Low |
| Authentication | None |
| Confidentiality Impact | Partial |
| Integrity Impact | None |
| Availability Impact | Partial |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
Affected Packages State
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 6 | iptables | Will not fix |
| Red Hat Enterprise Linux 5 | iptables | Will not fix |
Mitigation
Instead of --syn use --tcp-flags SYN,RST,ACK SYN in your rulesets in case you want to also match packets with both SYN+FIN flags set.
CVE description copyright © 2017, The MITRE Corporation
