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CVE
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CVE-2020-10781Date: (C)2020-09-16   (M)2024-04-30


A flaw was found in the Linux Kernel before 5.8-rc6 in the ZRAM kernel module, where a user with a local account and the ability to read the /sys/class/zram-control/hot_add file can create ZRAM device nodes in the /dev/ directory. This read allocates kernel memory and is not accounted for a user that triggers the creation of that ZRAM device. With this vulnerability, continually reading the device may consume a large amount of system memory and cause the Out-of-Memory (OOM) killer to activate and terminate random userspace processes, possibly making the system inoperable.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 5.5CVSS Score : 4.9
Exploit Score: 1.8Exploit Score: 3.9
Impact Score: 3.6Impact Score: 6.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: LOCALAccess Vector: LOCAL
Attack Complexity: LOWAccess Complexity: LOW
Privileges Required: LOWAuthentication: NONE
User Interaction: NONEConfidentiality: NONE
Scope: UNCHANGEDIntegrity: NONE
Confidentiality: NONEAvailability: COMPLETE
Integrity: NONE 
Availability: HIGH 
  
Reference:
https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10781
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=853eab68afc80f59f36bbdeb715e5c88c501e680
https://www.openwall.com/lists/oss-security/2020/06/18/1

CPE    2
cpe:/o:debian:debian_linux:9.0
cpe:/o:linux:linux_kernel
CWE    1
CWE-732
OVAL    18
oval:org.secpod.oval:def:705610
oval:org.secpod.oval:def:89050491
oval:org.secpod.oval:def:67093
oval:org.secpod.oval:def:67095
...

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