Vulnerabilities > CVE-2009-3725 - Permissions, Privileges, and Access Controls vulnerability in Linux Kernel
The connector layer in the Linux kernel before 18.104.22.168 does not require the CAP_SYS_ADMIN capability for certain interaction with the (1) uvesafb, (2) pohmelfs, (3) dst, or (4) dm subsystem, which allows local users to bypass intended access restrictions and gain privileges via calls to functions in these subsystems.
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Accessing, Modifying or Executing Executable Files An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
- Blue Boxing This type of attack against older telephone switches and trunks has been around for decades. A tone is sent by an adversary to impersonate a supervisor signal which has the effect of rerouting or usurping command of the line. While the US infrastructure proper may not contain widespread vulnerabilities to this type of attack, many companies are connected globally through call centers and business process outsourcing. These international systems may be operated in countries which have not upgraded Telco infrastructure and so are vulnerable to Blue boxing. Blue boxing is a result of failure on the part of the system to enforce strong authorization for administrative functions. While the infrastructure is different than standard current applications like web applications, there are historical lessons to be learned to upgrade the access control for administrative functions.
- Restful Privilege Elevation Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.
- Target Programs with Elevated Privileges This attack targets programs running with elevated privileges. The attacker would try to leverage a bug in the running program and get arbitrary code to execute with elevated privileges. For instance an attacker would look for programs that write to the system directories or registry keys (such as HKLM, which stores a number of critical Windows environment variables). These programs are typically running with elevated privileges and have usually not been designed with security in mind. Such programs are excellent exploit targets because they yield lots of power when they break. The malicious user try to execute its code at the same level as a privileged system call.
NASL family Debian Local Security Checks NASL id DEBIAN_DSA-2012.NASL description Two vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or privilege escalation. The Common Vulnerabilities and Exposures project identifies the following problems : - CVE-2009-3725 Philipp Reisner reported an issue in the connector subsystem which allows unprivileged users to send netlink packets. This allows local users to manipulate settings for uvesafb devices which are normally reserved for privileged users. - CVE-2010-0622 Jerome Marchand reported an issue in the futex subsystem that allows a local user to force an invalid futex state which results in a denial of service (oops). This update also includes fixes for regressions introduced by previous updates. See the referenced Debian bug pages for details. last seen 2020-06-01 modified 2020-06-02 plugin id 45054 published 2010-03-15 reporter This script is Copyright (C) 2010-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/45054 title Debian DSA-2012-1 : linux-2.6 - privilege escalation/denial of service NASL family Debian Local Security Checks NASL id DEBIAN_DSA-2015.NASL description A local vulnerability has been discovered in drbd8. Philipp Reisner fixed an issue in the drbd kernel module that allows local users to send netlink packets to perform actions that should be restricted to users with CAP_SYS_ADMIN privileges. This is a similar issue to those described by CVE-2009-3725. This update also fixes an ABI compatibility issue which was introduced by linux-2.6 (2.6.26-21lenny3). The prebuilt drbd module packages listed in this advisory require a linux-image package version 2.6.26-21lenny3 or greater. last seen 2020-06-01 modified 2020-06-02 plugin id 45069 published 2010-03-17 reporter This script is Copyright (C) 2010-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/45069 title Debian DSA-2015-1 : drbd8 - privilege escalation NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-864-1.NASL description It was discovered that the AX.25 network subsystem did not correctly check integer signedness in certain setsockopt calls. A local attacker could exploit this to crash the system, leading to a denial of service. Ubuntu 9.10 was not affected. (CVE-2009-2909) Jan Beulich discovered that the kernel could leak register contents to 32-bit processes that were switched to 64-bit mode. A local attacker could run a specially crafted binary to read register values from an earlier process, leading to a loss of privacy. (CVE-2009-2910) Dave Jones discovered that the gdth SCSI driver did not correctly validate array indexes in certain ioctl calls. A local attacker could exploit this to crash the system or gain elevated privileges. (CVE-2009-3080) Eric Dumazet and Jiri Pirko discovered that the TC and CLS subsystems would leak kernel memory via uninitialized structure members. A local attacker could exploit this to read several bytes of kernel memory, leading to a loss of privacy. (CVE-2009-3228, CVE-2009-3612) Earl Chew discovered race conditions in pipe handling. A local attacker could exploit anonymous pipes via /proc/*/fd/ and crash the system or gain root privileges. (CVE-2009-3547) Dave Jones and Francois Romieu discovered that the r8169 network driver could be made to leak kernel memory. A remote attacker could send a large number of jumbo frames until the system memory was exhausted, leading to a denial of service. Ubuntu 9.10 was not affected. (CVE-2009-3613). Ben Hutchings discovered that the ATI Rage 128 video driver did not correctly validate initialization states. A local attacker could make specially crafted ioctl calls to crash the system or gain root privileges. (CVE-2009-3620) Tomoki Sekiyama discovered that Unix sockets did not correctly verify namespaces. A local attacker could exploit this to cause a system hang, leading to a denial of service. (CVE-2009-3621) J. Bruce Fields discovered that NFSv4 did not correctly use the credential cache. A local attacker using a mount with AUTH_NULL authentication could exploit this to crash the system or gain root privileges. Only Ubuntu 9.10 was affected. (CVE-2009-3623) Alexander Zangerl discovered that the kernel keyring did not correctly reference count. A local attacker could issue a series of specially crafted keyring calls to crash the system or gain root privileges. Only Ubuntu 9.10 was affected. (CVE-2009-3624) David Wagner discovered that KVM did not correctly bounds-check CPUID entries. A local attacker could exploit this to crash the system or possibly gain elevated privileges. Ubuntu 6.06 and 9.10 were not affected. (CVE-2009-3638) Avi Kivity discovered that KVM did not correctly check privileges when accessing debug registers. A local attacker could exploit this to crash a host system from within a guest system, leading to a denial of service. Ubuntu 6.06 and 9.10 were not affected. (CVE-2009-3722) Philip Reisner discovered that the connector layer for uvesafb, pohmelfs, dst, and dm did not correctly check capabilties. A local attacker could exploit this to crash the system or gain elevated privileges. Ubuntu 6.06 was not affected. (CVE-2009-3725) Trond Myklebust discovered that NFSv4 clients did not robustly verify attributes. A malicious remote NFSv4 server could exploit this to crash a client or gain root privileges. Ubuntu 9.10 was not affected. (CVE-2009-3726) Robin Getz discovered that NOMMU systems did not correctly validate NULL pointers in do_mmap_pgoff calls. A local attacker could attempt to allocate large amounts of memory to crash the system, leading to a denial of service. Only Ubuntu 6.06 and 9.10 were affected. (CVE-2009-3888) Joseph Malicki discovered that the MegaRAID SAS driver had world-writable option files. A local attacker could exploit these to disrupt the behavior of the controller, leading to a denial of service. (CVE-2009-3889, CVE-2009-3939) Roel Kluin discovered that the Hisax ISDN driver did not correctly check the size of packets. A remote attacker could send specially crafted packets to cause a system crash, leading to a denial of service. (CVE-2009-4005) Lennert Buytenhek discovered that certain 802.11 states were not handled correctly. A physically-proximate remote attacker could send specially crafted wireless traffic that would crash the system, leading to a denial of service. Only Ubuntu 9.10 was affected. (CVE-2009-4026, CVE-2009-4027). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 43026 published 2009-12-07 reporter Ubuntu Security Notice (C) 2009-2019 Canonical, Inc. / NASL script (C) 2009-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/43026 title Ubuntu 6.06 LTS / 8.04 LTS / 8.10 / 9.04 / 9.10 : linux, linux-source-2.6.15 vulnerabilities (USN-864-1)
|description||BUGTRAQ ID: 36834 CVE(CAN) ID: CVE-2009-3725 Linux Kernel是开放源码操作系统Linux所使用的内核。 Linux Kernel的drivers/video/uvesafb.c、drivers/staging/pohmelfs/config.c、drivers/staging/dst/dcore.c和drivers/md/dm-log-userspace-transfer.c驱动中缺少能力检查，非特权用户可以向某些使用连接器的子系统发送netlink报文执行一些非授权的操作。 Linux kernel 2.6.x 厂商补丁： Linux ----- 目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载： http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-22.214.171.124|
|statement||Not vulnerable. This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 3, 4, 5 or Red Hat Enterprise MRG, as they do not include the upstream change introducing this flaw.|