REDHAT-BUG-447389: Integer Overflow
First published: Mon May 19 2008(Updated: )
Description of problem: Backport the feature length validation. Without this it's possible for rlen to ovelflow to 0, causing kmalloc(0), and a heap overflow during DCCP feature reconciliation. rlen = 1 + opt->dccpop_len; rpref = kmalloc(rlen, GFP_ATOMIC); memcpy(&rpref[1], opt->dccpop_val, opt->dccpop_len); Thanks to Brandon Edwards of McAfee Avert labs for discovering this issue. Impact: A vulnerability exists in the DCCP implementation which can be setup and exploited by a local attacker. The vulnerability is an integer overflow which leads to a kmalloc() for 0 bytes, followed by a memory copy into the returned pointer for 255 bytes, which causes a heap overflow. This type of vulnerability can be exploited by a local attacker to gain arbitrary code execution. Version-Release number of selected component (if applicable): 2.6.17 <= x <= 2.6.20 (See the timeline for more details) Additional information: This vulnerability affects the dccp kernel module (shipped as part of the RHEL kernel updates).
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Red Hat Linux | >=2.6.17<=2.6.20 |
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Frequently Asked Questions
What is the severity of REDHAT-BUG-447389?
The severity of REDHAT-BUG-447389 is high due to potential heap overflow vulnerabilities.
How do I fix REDHAT-BUG-447389?
To fix REDHAT-BUG-447389, you should apply the latest security patches provided by Red Hat for the affected kernel versions.
Which versions of the Linux kernel are affected by REDHAT-BUG-447389?
Versions of the Red Hat Linux kernel from 2.6.17 to 2.6.20 are affected by REDHAT-BUG-447389.
What type of vulnerability is REDHAT-BUG-447389?
REDHAT-BUG-447389 is a heap overflow vulnerability related to DCCP feature reconciliation.
Is REDHAT-BUG-447389 being actively exploited?
There is no public information indicating that REDHAT-BUG-447389 is actively being exploited, but it is advisable to address it promptly.
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