oss-security - CVE request - Linux Kernel KGDB/ppc issue

Follow @Openwall on Twitter for new release announcements and other news

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <4BD8EB3E.1020809@windriver.com>
Date: Thu, 29 Apr 2010 10:13:18 +0800
From: Hui Zhu <hui.zhu@...driver.com>
To: oss-security@...ts.openwall.com
CC: Paul Gortmaker <paul.gortmaker@...driver.com>,
        +security-linux <security-linux@...driver.com>,
        "Wessel, Jason" <jason.wessel@...driver.com>,
        Wu Fei <fei.wu@...driver.com>
Subject: CVE request - Linux Kernel KGDB/ppc issue

Hi All,

The problem is that if KGDB is enabled on a powerpc board, a
test that checks if a page is user or kernel is bypassed.
This means that a user can write to arbitrary kernel address space.

Upon further investigation, we found that kernels older than
the v2.6.30-rc1 release have the same problem for non-booke
ppc chips (74xx, 8641D), so we need two patches for kernels
up to that date, and then one patch for ones after that date.

Thanks,
Hui

View attachment "0001-kgdb-don-t-needlessly-skip-PAGE_USER-test-for-Fsl-bo.patch" of type "text/x-diff" (1448 bytes)

View attachment "0002-kgdb-don-t-needlessly-skip-PAGE_USER-test.patch" of type "text/x-diff" (1439 bytes)

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.