CVE-2012-2136: Buffer Overflow
First published: Wed Apr 25 2012(Updated: )
Data_len paremeter of sock_alloc_send_pskb() function is not validated before setting frags of allocated skb, which can lead to heap overflow. On Red Hat Enterprise Linux 5 a user having access to TUN/TAP virtual device could use this flaw to crash the system or to potentially escalate their privileges. The resulting CVSS score is 6.2. On Red Hat Enterprise Linux 6 a privileged guest user could use this flaw to crash the host or to potentially escalate their privileges on the host. The resulting CVSS score is 7.4.
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <3.0.37 | |
| Linux Kernel | >=3.1<3.2.23 | |
| Linux Kernel | >=3.3<3.4.5 | |
| <3.0.37 | ||
| >=3.1<3.2.23 | ||
| >=3.3<3.4.5 | ||
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.133-1 6.12.22-1 |
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Reference Links
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1cc
- http://rhn.redhat.com/errata/RHSA-2012-0743.html
- http://rhn.redhat.com/errata/RHSA-2012-1087.html
- http://secunia.com/advisories/50807
- http://ubuntu.com/usn/usn-1529-1
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.5
- http://www.securityfocus.com/bid/53721
- http://www.ubuntu.com/usn/USN-1535-1
- https://bugzilla.redhat.com/show_bug.cgi?id=816289
- https://github.com/torvalds/linux/commit/cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1cc
- https://launchpad.net/bugs/cve/CVE-2012-2136
- https://rhn.redhat.com/errata/RHSA-2012-0690.html
- https://rhn.redhat.com/errata/RHSA-2012-0743.html
- https://rhn.redhat.com/errata/RHSA-2012-1087.html
- https://security-tracker.debian.org/tracker/CVE-2012-2136
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2136
- https://nvd.nist.gov/vuln/detail/CVE-2012-2136
- https://ubuntu.com/security/CVE-2012-2136
Frequently Asked Questions
What is the severity of CVE-2012-2136?
CVE-2012-2136 is considered a high severity vulnerability due to the potential for heap overflow and system crash.
How do I fix CVE-2012-2136?
To mitigate CVE-2012-2136, update to a patched version of the Linux kernel, specifically versions 5.10.223-1, 5.10.226-1, 6.1.119-1, 6.1.123-1, 6.12.10-1, or 6.12.11-1.
Who is affected by CVE-2012-2136?
CVE-2012-2136 primarily affects users of the TUN/TAP virtual device on affected versions of the Linux kernel.
Can CVE-2012-2136 lead to privilege escalation?
Yes, CVE-2012-2136 can potentially allow an attacker to escalate their privileges on the system.
What are the affected versions for CVE-2012-2136?
CVE-2012-2136 affects Linux kernel versions up to 3.0.37, from 3.1 to 3.2.23, and between 3.3 to 3.4.5.
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