Vulnerability Description
The tun_chr_poll function in drivers/net/tun.c in the tun subsystem in the Linux kernel 2.6.30 and 2.6.30.1, when the -fno-delete-null-pointer-checks gcc option is omitted, allows local users to gain privileges via vectors involving a NULL pointer dereference and an mmap of /dev/net/tun, a different vulnerability than CVE-2009-1894.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | 2.6.30 |
Related Weaknesses (CWE)
References
- http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0241.html
- http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0246.html
- http://article.gmane.org/gmane.linux.network/124939
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://grsecurity.net/~spender/cheddar_bay.tgzPatch
- http://isc.sans.org/diary.html?storyid=6820Exploit
- http://lkml.org/lkml/2009/7/6/19Exploit
- http://secunia.com/advisories/35839Vendor Advisory
- http://www.openwall.com/lists/oss-security/2009/07/17/1
- http://www.vupen.com/english/advisories/2009/1925PatchVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=512284
- https://exchange.xforce.ibmcloud.com/vulnerabilities/51803
- https://www.redhat.com/en/blog/security-flaws-caused-compiler-optimizations
- http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0241.html
- http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0246.html
FAQ
What is CVE-2009-1897?
CVE-2009-1897 is a vulnerability with a CVSS score of 6.9 (MEDIUM). The tun_chr_poll function in drivers/net/tun.c in the tun subsystem in the Linux kernel 2.6.30 and 2.6.30.1, when the -fno-delete-null-pointer-checks gcc option is omitted, allows local users to gain ...
How severe is CVE-2009-1897?
CVE-2009-1897 has been rated MEDIUM with a CVSS base score of 6.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2009-1897?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.