Linux Kernel callchain.c perf_callchain_user_64 Kill resource management

CVSS Meta Temp Score
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel and classified as problematic. Impacted is the function perf_callchain_user_64 of the file arch/powerpc/perf/callchain.c. Executing a manipulation can lead to resource management (Kill). This vulnerability appears as CVE-2015-6526. The attack requires local access. There is no available exploit. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability has been found in Linux Kernel (Operating System) (the affected version is unknown) and classified as critical. This vulnerability affects the function perf_callchain_user_64 of the file arch/powerpc/perf/callchain.c. The manipulation with an unknown input leads to a resource management vulnerability (Kill). The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The perf_callchain_user_64 function in arch/powerpc/perf/callchain.c in the Linux kernel before 4.0.2 on ppc64 platforms allows local users to cause a denial of service (infinite loop) via a deep 64-bit userspace backtrace.

The weakness was presented 08/19/2015 as Bug 1218454 as confirmed bug report (Bugzilla). The advisory is shared for download at bugzilla.redhat.com. This vulnerability was named CVE-2015-6526 since 08/20/2015. The exploitation appears to be easy. The attack needs to be approached locally. A single authentication is needed for exploitation. There are known technical details, but no exploit is available. Responsible for the vulnerability is the following code: 

for (;;) {

The vulnerability scanner Nessus provides a plugin with the ID 86972 (RHEL 7 : kernel (RHSA-2015:2152)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Red Hat Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169128 (OpenSuSE Security Update for the Linux Kernel (openSUSE-SU-2016:2144-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. A possible mitigation has been published 4 months after the disclosure of the vulnerability. The vulnerability will be addressed with the following lines of code:

while (entry->nr < PERF_MAX_STACK_DEPTH) {

The vulnerability is also documented in the databases at X-Force (105798), Tenable (86972), SecurityFocus (BID 76401†) and Vulnerability Center (SBV-52381†). Additional details are provided at seclists.org. See VDB-92724 and VDB-94954 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 6.8

VulDB Base Score: 7.8
VulDB Temp Score: 6.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Name: Kill
Class: Resource management / Kill
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 86972
Nessus Name: RHEL 7 : kernel (RHSA-2015:2152)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 80056
OpenVAS Name: Oracle Linux Local Check: ELSA-2015-2152
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: git.kernel.org

Timelineinfo

08/18/2015 🔍
08/18/2015 +0 days 🔍
08/19/2015 +1 days 🔍
08/20/2015 +0 days 🔍
08/21/2015 +1 days 🔍
08/31/2015 +10 days 🔍
09/01/2015 +0 days 🔍
11/18/2015 +79 days 🔍
11/19/2015 +1 days 🔍
06/13/2022 +2397 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Bug 1218454
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-6526 (🔍)
GCVE (CVE): GCVE-0-2015-6526
GCVE (VulDB): GCVE-100-77368
X-Force: 105798 - Linux Kernel perf_callchain_user_64 denial of service
SecurityFocus: 76401 - Linux Kernel 'perf_callchain_user_64()' Function Denial of Service Vulnerability
SecurityTracker: 1033728
Vulnerability Center: 52381 - Linux Kernel <4.0.2 on ppc64 Local DoS Vulnerability via Deep 64-Bit Userspace Backtraces, Medium

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 08/21/2015 10:54
Updated: 06/13/2022 07:37
Changes: 08/21/2015 10:54 (64), 09/21/2018 10:09 (23), 06/13/2022 07:37 (2)
Complete: 🔍
Cache ID: 216:440:103

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