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CVE-2012-3520

Status Candidate

Overview

The Netlink implementation in the Linux kernel before 3.2.30 does not properly handle messages that lack SCM_CREDENTIALS data, which might allow local users to spoof Netlink communication via a crafted message, as demonstrated by a message to (1) Avahi or (2) NetworkManager.

Related Files

Red Hat Security Advisory 2012-1491-01
Posted Dec 4, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-1491-01 - The kernel-rt packages contain the Linux kernel, the core of any Linux operating system. A flaw was found in the way Netlink messages without SCM_CREDENTIALS data set were handled. When not explicitly set, the data was sent but with all values set to 0, including the process ID and user ID, causing the Netlink message to appear as if it were sent with root privileges. A local, unprivileged user could use this flaw to send spoofed Netlink messages to an application, possibly resulting in the application performing privileged operations if it relied on SCM_CREDENTIALS data for the authentication of Netlink messages.

tags | advisory, kernel, local, root, spoof
systems | linux, redhat
advisories | CVE-2012-0957, CVE-2012-2133, CVE-2012-3400, CVE-2012-3430, CVE-2012-3511, CVE-2012-3520, CVE-2012-4508, CVE-2012-4565
SHA-256 | 9fc196ee7e1a6d99be88df166bba11b7dfc2a6af8804a850b507161ce71b9c93
Ubuntu Security Notice USN-1610-1
Posted Oct 12, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1610-1 - Pablo Neira Ayuso discovered a flaw in the credentials of netlink messages. An unprivileged local attacker could exploit this by getting a netlink based service, that relies on netlink credentials, to perform privileged actions.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2012-3520
SHA-256 | 697880beb07592581d786acced25e12402f8ea81e2020a74c4da5adcc3af8003
Ubuntu Security Notice USN-1599-1
Posted Oct 10, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1599-1 - Pablo Neira Ayuso discovered a flaw in the credentials of netlink messages. An unprivileged local attacker could exploit this by getting a netlink based service, that relies on netlink credentials, to perform privileged actions.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2012-3520
SHA-256 | 97f627a7e057b15463f0a1a2f5d4e63676147038092fdff6afdd937a3f30f550
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