CVE-2010-4527: Buffer Overflow
First published: Thu Jan 06 2011(Updated: )
"The load_mixer_volumes() function, which can be triggered by unprivileged users via the SOUND_MIXER_SETLEVELS ioctl, is vulnerable to a buffer overflow. Because the provided 'name' argument isn't guaranteed to be NULL terminated at the expected 32 bytes, it's possible to overflow past the end of the last element in the mixer_vols array. Further exploitation can result in an arbitrary kernel write (via subsequent calls to load_mixer_volumes()) leading to privilege escalation, or arbitrary kernel reads via get_mixer_levels(). In addition, the strcmp() may leak bytes beyond the mixer_vols array. This only affects users who are using OSS (not to be confused with the OSS emulation provided by ALSA), and requires access to a device file normally restricted to users in group audio." <a href="http://seclists.org/oss-sec/2010/q4/377">http://seclists.org/oss-sec/2010/q4/377</a> Upstream commit: <a href="http://git.kernel.org/linus/d81a12bc29ae4038770e05dce4ab7f26fd5880fb">http://git.kernel.org/linus/d81a12bc29ae4038770e05dce4ab7f26fd5880fb</a> Acknowledgements: Red Hat would like to thank Dan Rosenberg for reporting this issue.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux-2.6 | ||
| debian/user-mode-linux | ||
| Linux kernel | <2.6.37 | |
| Linux Kernel | <2.6.37 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- http://openwall.com/lists/oss-security/2010/12/31/1
- http://www.securityfocus.com/bid/45629
- https://bugzilla.redhat.com/show_bug.cgi?id=667615
- http://xorl.wordpress.com/2011/01/09/cve-2010-4527-linux-kernel-oss-sound-card-driver-buffer-overflow/
- http://openwall.com/lists/oss-security/2010/12/31/4
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.37
- http://secunia.com/advisories/42765
- http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00002.html
- http://secunia.com/advisories/43291
- http://www.vupen.com/english/advisories/2011/0375
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=d81a12bc29ae4038770e05dce4ab7f26fd5880fb
- https://launchpad.net/bugs/cve/CVE-2010-4527
- http://seclists.org/oss-sec/2010/q4/377
- http://git.kernel.org/linus/d81a12bc29ae4038770e05dce4ab7f26fd5880fb
- https://security-tracker.debian.org/tracker/CVE-2010-4527
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-4527
- https://nvd.nist.gov/vuln/detail/CVE-2010-4527
- https://ubuntu.com/security/CVE-2010-4527
Frequently Asked Questions
What is the severity of CVE-2010-4527?
CVE-2010-4527 has a high severity rating due to the potential for buffer overflow that could be exploited by unprivileged users.
How do I fix CVE-2010-4527?
To mitigate CVE-2010-4527, ensure that you upgrade to a Linux kernel version later than 2.6.37.
Who is affected by CVE-2010-4527?
CVE-2010-4527 affects various Linux kernel versions up to 2.6.37 and user-mode-linux implementations.
What type of vulnerability is CVE-2010-4527?
CVE-2010-4527 is a buffer overflow vulnerability affecting the load_mixer_volumes() function.
Can CVE-2010-4527 be exploited remotely?
CVE-2010-4527 requires local access to the system, making it not directly exploitable remotely.
- collector/launchpad-cve
- source/Launchpad
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2010-4527
- agent/type
- agent/first-publish-date
- agent/author
- collector/security-tracker-debian
- source/Debian
- agent/software-canonical-lookup
- agent/weakness
- agent/severity
- collector/usn-cve
- source/Ubuntu
- agent/references
- agent/remedy
- agent/softwarecombine
- agent/description
- agent/event
- agent/last-modified-date
- agent/trending
- agent/source
- agent/tags
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup-request
- collector/nvd-historical
- collector/nvd-index
- package-manager/debian
- vendor/linux
- canonical/linux kernel