Linux - SecurityThis forum is for all security related questions.
Questions, tips, system compromises, firewalls, etc. are all included here.
Notices
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use.
Exclusive for LQ members, get up to 45% off per month. Click here for more info.
It includes several bugfixes, one which addresses a security vulnerability. This is quite likely the last 2.6.19.y release, unless something extremely serious is found.
Quote:
fix memory corruption from misinterpreted bad_inode_ops return values (CVE-2006-5753)
NOTE: A few hours after, 2.6.19.7 was released, addressing a few issues which slipped past the -stable team. It does not appear to address any vulnerabilities. The ChangeLog for it is here.
Linux Kernel Omnikey CardMan 4040 Driver Buffer Overflow (Not Critical)
Quote:
Description:
A vulnerability has been reported in the Linux Kernel, which potentially can be exploited by malicious, local users to cause a DoS (Denial of Service) or gain escalated privileges.
The vulnerability is caused due to boundary errors within the "read()" and "write()" functions of the Omnikey CardMan 4040 driver. This can be exploited to cause a buffer overflow and may allow the execution of arbitrary code with kernel privileges.
The vulnerability is reported in versions prior to 2.6.21-rc3.
Linux Kernel NULL Pointer Dereferences and Security Bypass
Quote:
Description:
Some vulnerabilities have been reported in the Linux Kernel, which potentially can be exploited by malicious people to bypass certain security restrictions or cause a DoS (Denial of Service).
1) NULL pointer dereferences within net/netfilter/nfnetlink_log.c can potentially be exploited to cause a kernel panic by sending specially crafted packets to a vulnerable system.
2) An error exists within conntrack when assembling fragmented IPv6 packets. This can potentially be exploited to bypass certain rulesets that accept ESTABLISHED packets early.
Linux Kernel "ipv6_fl_socklist" Denial of Service (Less Critical)
Quote:
Description:
A vulnerability has been reported in the Linux Kernel, which can be exploited by malicious, local users to cause a DoS (Denial of Service).
The vulnerability is caused due to listening IPv6 TCP sockets incorrectly sharing the "ipv6_fl_socklist" IPv6 flowlist with child sockets. This can be exploited to e.g. cause a kernel crash by performing certain actions on IPv6 TCP sockets.
Linux Kernel "atalk_sum_skb()" AppleTalk Denial of Service (Less Critical)
Quote:
Description:
A vulnerability has been reported in the Linux Kernel, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerability is caused due to an error within the "atalk_sum_skb()" function when creating the checksum of an AppleTalk frame that is shorter than specified in the header. This can be exploited to trigger a "BUG_ON" condition by sending a specially crafted AppleTalk frame to a vulnerable system.
Successful exploitation requires that the AppleTalk kernel module is loaded.
Linux Kernel "L2CAP" and "HCI" Information Disclosure (Not Critical)
Quote:
Description:
Two weaknesses have been reported in the Linux Kernel, which can be exploited by malicious, local users to disclose potential sensitive information.
The weaknesses are caused due to uninitialised variables within the "hci_sock_setsockopt()" function in net/bluetooth/hci_sock.c and the "l2cap_sock_setsockopt()" function in net/bluetooth/l2cap.c and can potentially be exploited to disclose uninitialised bytes of the kernel stack.
The weaknesses are reported in versions prior to 2.4.34.3.
Linux Kernel IPv6 Type 0 Route Headers Denial of Service (Moderately Critical)
Quote:
Description:
A security issue has been reported in the Linux Kernel, which can be exploited by malicious people to cause a DoS (Denial of Service).
The security issue is caused due to an error within the processing of packets with IPv6 type 0 route headers. This can be exploited to cause a DoS due to high network traffic by sending specially crafted IPv6 packets to vulnerable systems.
Linux Kernel netlink NETLINK_FIB_LOOKUP Denial of Service (Not Critical)
Quote:
Description:
A vulnerability has been reported in the Linux Kernel, which can be exploited by malicious, local users to cause a DoS (Denial of Service).
The vulnerability is caused due to an error within the handling of NETLINK_FIB_LOOKUP reply messages. This can be exploited to cause an infinite recursion, which could result in a stack overflow.
The vulnerability is reported in versions prior to 2.6.20.8. Other versions may also be affected.
Linux Kernel PPPoE Socket "PPPIOCGCHAN" Denial of Service (Not Critical)
Quote:
Description:
A vulnerability has been reported in the Linux Kernel, which potentially can be exploited by malicious, local users to cause a DoS (Denial of Service).
The vulnerability is caused due to a memory leak when releasing PPPoE sockets after they are connected, but before the "PPPIOCGCHAN" ioctl is called. This can be exploited to cause a DoS due to memory exhaustion.
The vulnerability is reported in versions prior to 2.6.21-git8. Other versions may also be affected.
Allow in-place crypto operations. Also remove the coherent user flag
(we use it automagically now), and by default use the user written
key rather then the HW hidden key - this makes crypto just work without
any special considerations, and thats OK, since its our only usage
model.
Linux Kernel VFAT IOCTLs Denial of Service (Not Critical)
Quote:
Description:
A security issue has been reported in the Linux Kernel, which can be exploited by malicious, local users to cause a DoS (Denial of Service).
The security issue is caused due to an error within the handling of certain VFAT IOCTLs on 64bit systems, which can be exploited to crash the kernel by calling certain IOCTLs with malicious parameters.
Successful exploitation requires a 64bit-system and vfat and msdos file systems.
LinuxQuestions.org is looking for people interested in writing
Editorials, Articles, Reviews, and more. If you'd like to contribute
content, let us know.