PT-2009-4357 · Linux · Linux Kernel

Herbert Xu · Published 2009-07-20 · Updated 2023-02-13 · CVE-2009-1897

Positive Technologies (AI Summary)

CVSS v2.0

6.9

Medium

Base vector

AV:L/AC:M/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions: Linux kernel versions 2.6.30 and 2.6.30.1

Description: The issue allows local users to gain privileges via vectors involving a NULL pointer dereference and an mmap of /dev/net/tun. This is due to the tun chr poll function in drivers/net/tun.c in the tun subsystem.

Recommendations: For Linux kernel versions 2.6.30 and 2.6.30.1, consider compiling the kernel with the -fno-delete-null-pointer-checks gcc option to mitigate the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

CVE-2009-1897

Affected Products

Linux Kernel

References · 17

• 🔥 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=3c8a9c63d5fd738c261bd0ceece04d9c8357ca13 · Exploit
• 🔥 https://exploit-db.com/exploits/33088 · Exploit
• 🔥 https://exploit-db.com/exploits/9191 · Exploit
• 🔥 http://isc.sans.org/diary.html?storyid=6820 · Exploit
• 🔥 http://lkml.org/lkml/2009/7/6/19 · Exploit
• http://grsecurity.net/~spender/cheddar_bay.tgz · Patch
• http://secunia.com/advisories/35839 · Vendor Advisory
• http://vupen.com/english/advisories/2009/1925 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2009-1897 · Security Note
• https://exchange.xforce.ibmcloud.com/vulnerabilities/51803 · Note
• http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0246.html · Note
• http://article.gmane.org/gmane.linux.network/124939 · Note
• http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0241.html · Note
• https://redhat.com/en/blog/security-flaws-caused-compiler-optimizations · Note
• http://openwall.com/lists/oss-security/2009/07/17/1 · Note