Linux Kernel s390/s390x /proc/sys/vm/cmm_timeout poison null byte

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.3$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Linux Kernel. This impacts an unknown function of the file /proc/sys/vm/cmm_timeout of the component s390/s390x. The manipulation leads to poison null byte. This vulnerability is listed as CVE-2020-10773. The attack must be carried out locally. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel (Operating System) (affected version not known). This issue affects some unknown functionality of the file /proc/sys/vm/cmm_timeout of the component s390/s390x. The manipulation with an unknown input leads to a poison null byte vulnerability. Using CWE to declare the problem leads to CWE-626. The product does not properly handle null bytes or NUL characters when passing data between different representations or components. Impacted is confidentiality. The summary by CVE is:

A stack information leak flaw was found in s390/s390x in the Linux kernel’s memory manager functionality, where it incorrectly writes to the /proc/sys/vm/cmm_timeout file. This flaw allows a local user to see the kernel data.

The weakness was presented 09/10/2020 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. The identification of this vulnerability is CVE-2020-10773 since 03/20/2020. An attack has to be approached locally. Additional levels of successful authentication are necessary for exploitation. Technical details are known, but no exploit is available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

See VDB-161091 for similar entry. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.3

VulDB Base Score: 2.3
VulDB Temp Score: 2.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.4
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Poison null byte
CWE: CWE-626
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/20/2020 🔍
09/10/2020 +174 days 🔍
09/11/2020 +1 days 🔍
09/11/2020 +0 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: bugzilla.redhat.com
Status: Not defined

CVE: CVE-2020-10773 (🔍)
GCVE (CVE): GCVE-0-2020-10773
GCVE (VulDB): GCVE-100-161093
See also: 🔍

Entryinfo

Created: 09/11/2020 07:16
Updated: 09/11/2020 07:21
Changes: 09/11/2020 07:16 (40), 09/11/2020 07:21 (12)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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