CVE-2011-1493
First published: Thu Dec 29 2011(Updated: )
"When parsing the FAC_NATIONAL_DIGIS facilities field, it's possible for a remote host to provide more digipeaters than expected, resulting in heap corruption. Check against ROSE_MAX_DIGIS to prevent overflows, and abort facilities parsing on failure. Additionally, when parsing the FAC_CCITT_DEST_NSAP and FAC_CCITT_SRC_NSAP facilities fields, a remote host can provide a length of less than 10, resulting in an underflow in a memcpy size, causing a kernel panic due to massive heap corruption. A length of greater than 20 results in a stack overflow of the callsign array. Abort facilities parsing on these invalid length values." These issues may both result in code execution. They may be triggered by a remote attacker if the victim has a listening ROSE socket, or by a local attacker (for privilege escalation) if a ROSE device exists (e.g. rose0). Ben Hutchings followed up with a patch [2] that resolves a number of other ROSE issues related to lack of size field validation, some of which may also result in heap corruption. [1] <a href="http://marc.info/?l=linux-netdev&m=130060344616926">http://marc.info/?l=linux-netdev&m=130060344616926</a> [2] <a href="http://marc.info/?l=linux-netdev&m=130063972406389&w=2">http://marc.info/?l=linux-netdev&m=130063972406389&w=2</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 | ||
| Linux kernel | =2.6.38-rc7 | |
| Linux kernel | =2.6.38-rc6 | |
| Linux kernel | =2.6.38-rc4 | |
| Linux kernel | =2.6.38.3 | |
| Linux kernel | <=2.6.38.8 | |
| Linux kernel | =2.6.38-rc3 | |
| Linux kernel | =2.6.38-rc5 | |
| Linux kernel | =2.6.38-rc2 | |
| Linux kernel | =2.6.38.6 | |
| Linux kernel | =2.6.38.1 | |
| Linux kernel | =2.6.38-rc1 | |
| Linux kernel | =2.6.38.5 | |
| Linux kernel | =2.6.38.2 | |
| Linux kernel | =2.6.38 | |
| Linux kernel | =2.6.38-rc8 | |
| Linux kernel | =2.6.38.4 | |
| Linux kernel | =2.6.38.7 | |
| Linux Kernel | <=2.6.38.8 | |
| Linux Kernel | =2.6.38 | |
| Linux Kernel | =2.6.38-rc1 | |
| Linux Kernel | =2.6.38-rc2 | |
| Linux Kernel | =2.6.38-rc3 | |
| Linux Kernel | =2.6.38-rc4 | |
| Linux Kernel | =2.6.38-rc5 | |
| Linux Kernel | =2.6.38-rc6 | |
| Linux Kernel | =2.6.38-rc7 | |
| Linux Kernel | =2.6.38-rc8 | |
| Linux Kernel | =2.6.38.1 | |
| Linux Kernel | =2.6.38.2 | |
| Linux Kernel | =2.6.38.3 | |
| Linux Kernel | =2.6.38.4 | |
| Linux Kernel | =2.6.38.5 | |
| Linux Kernel | =2.6.38.6 | |
| Linux Kernel | =2.6.38.7 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=770777
- https://github.com/torvalds/linux/commit/be20250c13f88375345ad99950190685eda51eb8
- http://www.openwall.com/lists/oss-security/2011/04/05/19
- http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00020.html
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=be20250c13f88375345ad99950190685eda51eb8
- https://launchpad.net/bugs/cve/CVE-2011-1493
- http://marc.info/?l=linux-netdev&m=130060344616926
- http://marc.info/?l=linux-netdev&m=130063972406389&w=2
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=770778
- https://security-tracker.debian.org/tracker/CVE-2011-1493
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-1493
- https://nvd.nist.gov/vuln/detail/CVE-2011-1493
- https://ubuntu.com/security/CVE-2011-1493
Frequently Asked Questions
What is the severity of CVE-2011-1493?
CVE-2011-1493 is classified as a moderate severity vulnerability due to potential heap corruption.
How do I fix CVE-2011-1493?
To mitigate CVE-2011-1493, ensure that the software is updated to a patched version of the Linux Kernel beyond 2.6.38.7.
What type of vulnerability is CVE-2011-1493?
CVE-2011-1493 is a heap overflow vulnerability that can be triggered by an unexpected number of digipeaters.
Which versions of Linux Kernel are affected by CVE-2011-1493?
CVE-2011-1493 affects Linux Kernel versions 2.6.38 and earlier, including various 2.6.38 release candidates.
Can CVE-2011-1493 be exploited remotely?
Yes, CVE-2011-1493 can be exploited remotely by delivering crafted packets to the vulnerable system.
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