CVE-2009-1897
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…
Does this matter?
Lower severity and a low EPSS score (1.52%). Track it; it rarely justifies an emergency change on its own.
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 2.0
- 6.9 MEDIUMAV:L/AC:M/Au:N/C:C/I:C/A:C
- EPSS
- 1.52% probability · 73th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- linux/linux kernel
- Source
- secalert@redhat.com
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=3c8a9c63d5fd738c261bd0ceece04d9c8357ca13
- 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/2009/1925Patch, Vendor 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
- http://article.gmane.org/gmane.linux.network/124939
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=3c8a9c63d5fd738c261bd0ceece04d9c8357ca13
- 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/2009/1925Patch, Vendor 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.