low
1.9
CWE
909
Advisory Published
CVE Published
Updated

CVE-2010-4083

First published: Mon Nov 01 2010(Updated: )

Description of problem: The semctl syscall has several code paths that lead to the leakage of uninitialized kernel stack memory (namely the IPC_INFO, SEM_INFO, IPC_STAT, and SEM_STAT commands) during the use of the older, obsolete version of the semid_ds struct. The copy_semid_to_user() function declares a semid_ds struct on the stack and copies it back to the user without initializing or zeroing the 'sem_base', 'sem_pending', 'sem_pending_last', and 'undo' pointers, allowing the leakage of 16 bytes of kernel stack memory. The code is still reachable on 32-bit systems - when calling semctl() newer glibc's automatically OR the IPC command with the IPC_64 flag, but invoking the syscall directly allows users to use the older versions of the struct. Reference: <a href="http://www.openwall.com/lists/oss-security/2010/10/06/6">http://www.openwall.com/lists/oss-security/2010/10/06/6</a> <a href="http://www.spinics.net/lists/mm-commits/msg80234.html">http://www.spinics.net/lists/mm-commits/msg80234.html</a> Acknowledgements: Red Hat would like to thank Dan Rosenberg for reporting this issue.

Credit: cve@mitre.org cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
debian/linux-2.6
Linux Kernel<2.6.36
SUSE Linux=11.3
SUSE Linux Enterprise Desktop=10-sp3
SUSE Linux Enterprise Desktop=11-sp1
SUSE Linux Enterprise Real Time Extension=11-sp1
SUSE Linux Enterprise Server=9
SUSE Linux Enterprise Server=10-sp3
SUSE Linux Enterprise Server=11-sp1
SUSE Linux Enterprise Software Development Kit=10-sp3
Debian=5.0

Remedy

http://www.openwall.com/lists/oss-security/2010/09/25/2

Remedy

http://www.openwall.com/lists/oss-security/2010/10/07/1

Remedy

http://www.openwall.com/lists/oss-security/2010/10/25/3

Remedy

http://www.spinics.net/lists/mm-commits/msg80234.html

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=648673

Remedy

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=982f7c2b2e6a28f8f266e075d92e19c0dd4c6e56

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2010-4083?

    CVE-2010-4083 is considered to have moderate severity due to its potential for information leakage.

  • How do I fix CVE-2010-4083?

    To mitigate CVE-2010-4083, it is recommended to update to a more recent version of the Linux kernel that does not use the affected semid_ds structure.

  • Which versions of the Linux kernel are affected by CVE-2010-4083?

    CVE-2010-4083 affects the Linux kernel versions prior to 2.6.36 and several specific versions of SUSE and Debian distributions.

  • What types of data are leaked due to CVE-2010-4083?

    CVE-2010-4083 leads to the leakage of uninitialized kernel stack memory which could potentially expose sensitive data.

  • Is CVE-2010-4083 exploitable remotely?

    CVE-2010-4083 is more likely to be exploited locally since it involves kernel memory access through system calls.

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