Vulnerability identifier: #VU44768
Vulnerability risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-476
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor: Linux Foundation
Description
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The befs_follow_link function in fs/befs/linuxvfs.c in the Linux kernel before 3.1-rc3 does not validate the length attribute of long symlinks, which allows local users to cause a denial of service (incorrect pointer dereference and OOPS) by accessing a long symlink on a malformed Be filesystem.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Linux kernel: 3.0 - 3.0.101
External links
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=338d0f0a6fbc82407864606f5b64b75aeb3c70f2
http://securityreason.com/securityalert/8360
http://www.kernel.org/pub/linux/kernel/v3.0/testing/ChangeLog-3.1-rc3
http://www.openwall.com/lists/oss-security/2011/08/19/1
http://www.openwall.com/lists/oss-security/2011/08/19/5
http://www.pre-cert.de/advisories/PRE-SA-2011-06.txt
http://www.securityfocus.com/archive/1/519387/100/0/threaded
http://www.securityfocus.com/bid/49256
http://exchange.xforce.ibmcloud.com/vulnerabilities/69343
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.