PT-2011-1076 · Linux+1 · Linux Kernel+1

Robert Swiecki · Published 2011-03-01 · Updated 2023-02-13 · CVE-2011-1593

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 2.6.38.4

Description The issue is related to multiple integer overflows in the next pidmap function in kernel/pid.c, which can cause a denial of service (system crash) via crafted system calls, specifically (1) getdents or (2) readdir. Additionally, there are multiple vulnerabilities in the kernel-kdumppae package of SUSE Linux Enterprise that can lead to disruption of protected information availability, and these can be exploited remotely.

Recommendations For Linux kernel versions prior to 2.6.38.4, update to version 2.6.38.4 or later to resolve the issue. As a temporary workaround, consider restricting access to the next pidmap function in kernel/pid.c to minimize the risk of exploitation. Avoid using the getdents and readdir system calls in the affected kernel versions until the issue is resolved.

Exploit

Fix

DoS

RCE

Integer Overflow

Weakness Enumeration

CWE-20

CWE-190

Related Identifiers

BDU:2015-04607

CVE-2011-1593

DSA-2240-1

DSA-2264-1

RHSA-2011:0927

RHSA-2011:1189

RHSA-2011:1253

RHSA-2011_0927

RHSA-2011_1189

Affected Products

Linux Kernel

Red Hat

References · 20

• 🔥 http://groups.google.com/group/fa.linux.kernel/msg/4a28ecb7f755a88d?dmode=source · Exploit
• https://bugzilla.redhat.com/show_bug.cgi?id=697822 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2011-1593 · Security Note
• http://openwall.com/lists/oss-security/2011/04/20/1 · Patch
• https://bdu.fstec.ru/vul/2015-04607 · Security Note
• http://rhn.redhat.com/errata/RHSA-2011-0927.html · Vendor Advisory
• http://ubuntu.com/usn/USN-1146-1 · Vendor Advisory
• http://openwall.com/lists/oss-security/2011/04/19/1 · Patch
• https://linux.oracle.com/errata/ELSA-2011-1189.html · Vendor Advisory
• http://secunia.com/advisories/44164 · Vendor Advisory
• http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.38.4 · Vendor Advisory
• https://github.com/torvalds/linux/commit/982134ba62618c2d69fbbbd166d0a11ee3b7e3d8 · Note
• https://github.com/torvalds/linux/commit/4ff67b720c02c36e54d55b88c2931879b7db1cd2 · Note
• https://suse.com/support/security/advisories/2011_34_kernel.html · Note
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=c78193e9c7bcbf25b8237ad0dec82f805c4ea69b · Note