CVE-2008-2358: Buffer 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).
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux kernel | =2.6.17 | |
| Linux kernel | =2.6.20 | |
| Linux kernel | =2.6.19 | |
| Linux kernel | =2.6.18 |
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Reference Links
- http://www.debian.org/security/2008/dsa-1592
- http://www.securityfocus.com/bid/29603
- http://www.securitytracker.com/id?1020211
- http://secunia.com/advisories/30000
- http://secunia.com/advisories/30818
- https://www.redhat.com/archives/fedora-package-announce/2008-July/msg00082.html
- http://lists.opensuse.org/opensuse-security-announce/2008-06/msg00006.html
- http://www.ubuntu.com/usn/usn-625-1
- http://secunia.com/advisories/30849
- http://www.mandriva.com/security/advisories?name=MDVSA-2008:112
- https://bugzilla.redhat.com/show_bug.cgi?id=447389
- http://secunia.com/advisories/30920
- http://www.redhat.com/support/errata/RHSA-2008-0519.html
- http://secunia.com/advisories/31107
- http://www.mandriva.com/security/advisories?name=MDVSA-2008:167
- https://exchange.xforce.ibmcloud.com/vulnerabilities/43034
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9644
- http://lists.debian.org/debian-security-announce/2008/msg00172.html
Frequently Asked Questions
What is the severity of CVE-2008-2358?
CVE-2008-2358 has a medium severity rating due to its potential for heap overflow.
How do I fix CVE-2008-2358?
To fix CVE-2008-2358, update the Linux kernel to a version that includes the patch for feature length validation.
What versions of Linux Kernel are affected by CVE-2008-2358?
CVE-2008-2358 affects Linux Kernel versions 2.6.17, 2.6.18, 2.6.19, and 2.6.20.
What type of vulnerability is CVE-2008-2358?
CVE-2008-2358 is a heap overflow vulnerability that can occur during DCCP feature reconciliation.
Is CVE-2008-2358 a remote exploit?
CVE-2008-2358 can potentially be exploited remotely if the affected kernel versions are exposed.
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