Vulnerability Name:

CVE-2020-27830 (CCN-192718)

Assigned:2020-12-07
Published:2020-12-07
Updated:2021-09-07
Summary:A vulnerability was found in Linux Kernel where in the spk_ttyio_receive_buf2() function, it would dereference spk_ttyio_synth without checking whether it is NULL or not, and may lead to a NULL-ptr deref crash.
CVSS v3 Severity:5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
5.0 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
5.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
5.0 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:2.1 Low (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
4.6 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-476
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2020-27830

Source: MLIST
Type: Mailing List, Third Party Advisory
[oss-security] 20201208 Re: Linux kernel NULL-ptr deref bug in spk_ttyio_receive_buf2

Source: MLIST
Type: Mailing List, Third Party Advisory
[oss-security] 20201208 Re: Linux kernel NULL-ptr deref bug in spk_ttyio_receive_buf2

Source: MISC
Type: Issue Tracking, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1919900

Source: XF
Type: UNKNOWN
linux-kernel-spkttyioreceivebuf2-dos(192718)

Source: CCN
Type: Linux Kernel GIT Repository
speakup: Reject setting the speakup line discipline outside of speakup

Source: MLIST
Type: Mailing List, Third Party Advisory
[debian-lts-announce] 20210212 [SECURITY] [DLA 2557-1] linux-4.19 security update

Source: CCN
Type: oss-sec Mailing List, Mon, 7 Dec 2020 10:20:44 +0800
Linux kernel NULL-ptr deref bug in spk_ttyio_receive_buf2

Source: CONFIRM
Type: Third Party Advisory
https://security.netapp.com/advisory/ntap-20210625-0004/

Source: DEBIAN
Type: Third Party Advisory
DSA-4843

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:* (Version < 5.9.14)

    • Configuration 2:
  • cpe:/o:debian:debian_linux:9.0:*:*:*:*:*:*:*
  • OR cpe:/o:debian:debian_linux:10.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:8029
    P
    		kernel-docs-5.14.21-150500.53.2 on GA media (Moderate)
    2023-06-20
    oval:org.opensuse.security:def:8090
    P
    		reiserfs-kmp-default-5.14.21-150500.53.2 on GA media (Moderate)
    2023-06-12
    oval:org.opensuse.security:def:7580
    P
    		libbsd-devel-0.8.7-3.3.17 on GA media (Moderate)
    2023-06-12
    oval:org.opensuse.security:def:7539
    P
    		kernel-64kb-5.14.21-150500.53.2 on GA media (Moderate)
    2023-06-12
    oval:org.opensuse.security:def:7702
    P
    		libxml2-2-2.10.3-150500.3.1 on GA media (Moderate)
    2023-06-12
    oval:org.opensuse.security:def:665
    P
    		Security update for samba (Moderate)
    2022-08-03
    oval:org.opensuse.security:def:3381
    P
    		tboot-20190704_1.9.10-1.7 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:3448
    P
    		busybox-1.21.1-3.3 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:3453
    P
    		clamav-0.101.3-1.19 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:3567
    P
    		libXtst6-1.2.2-7.1 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:3398
    P
    		wpa_supplicant-2.6-15.10.1 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:95196
    P
    		imobiledevice-tools-1.3.0+git.20210921-150400.1.15 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:94590
    P
    		kernel-64kb-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:95197
    P
    		kernel-default-extra-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:95028
    P
    		kernel-docs-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:94493
    P
    		apparmor-abstractions-3.0.4-150400.3.4 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:95078
    P
    		reiserfs-kmp-default-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:2960
    P
    		kernel-64kb-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:94877
    P
    		podman-3.4.4-150400.2.14 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:95083
    P
    		kernel-azure-5.14.21-150400.12.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:89
    P
    		kernel-64kb-5.3.18-57.3 on GA media (Moderate)
    2022-06-13
    oval:org.opensuse.security:def:102349
    P
    		Security update for the Linux Kernel (Important)
    2022-04-13
    oval:org.opensuse.security:def:101590
    P
    		Security update for the Linux Kernel (Important)
    2022-01-19
    oval:org.opensuse.security:def:4468
    P
    		Security update for the Linux Kernel (Live Patch 18 for SLE 12 SP5) (Important)
    2021-08-17
    oval:org.opensuse.security:def:101909
    P
    		Security update for the Linux Kernel (Important)
    2021-08-14
    oval:org.opensuse.security:def:2013
    P
    		reiserfs-kmp-default-5.3.18-57.3 on GA media (Moderate)
    2021-08-10
    oval:org.opensuse.security:def:63102
    P
    		reiserfs-kmp-default-5.3.18-57.3 on GA media (Moderate)
    2021-08-10
    oval:org.opensuse.security:def:2036
    P
    		kernel-azure-5.3.18-36.1 on GA media (Moderate)
    2021-08-10
    oval:org.opensuse.security:def:63125
    P
    		kernel-azure-5.3.18-36.1 on GA media (Moderate)
    2021-08-10
    oval:org.opensuse.security:def:101206
    P
    		libmp3lame-devel-3.100-1.33 on GA media (Moderate)
    2021-08-09
    oval:org.opensuse.security:def:1018
    P
    		kernel-64kb-5.3.18-57.3 on GA media (Moderate)
    2021-08-09
    oval:org.opensuse.security:def:62107
    P
    		kernel-64kb-5.3.18-57.3 on GA media (Moderate)
    2021-08-09
    oval:org.opensuse.security:def:1930
    P
    		kernel-docs-5.3.18-57.3 on GA media (Moderate)
    2021-08-09
    oval:org.opensuse.security:def:63019
    P
    		kernel-docs-5.3.18-57.3 on GA media (Moderate)
    2021-08-09
    oval:org.opensuse.security:def:100865
    P
    		kernel-64kb-5.3.18-57.3 on GA media (Moderate)
    2021-08-09
    oval:org.opensuse.security:def:71848
    P
    		kernel-64kb-5.3.18-57.3 on GA media (Moderate)
    2021-08-09
    oval:org.opensuse.security:def:101277
    P
    		kernel-docs-5.3.18-57.3 on GA media (Moderate)
    2021-08-09
    oval:org.opensuse.security:def:72738
    P
    		kernel-docs-5.3.18-57.3 on GA media (Moderate)
    2021-08-09
    oval:org.opensuse.security:def:102284
    P
    		Security update for graphviz (Critical)
    2021-05-19
    oval:org.opensuse.security:def:111206
    P
    		Security update for RT kernel (Moderate)
    2021-02-05
    oval:org.opensuse.security:def:97173
    P
    		Recommended update for RT kernel (Low)
    2021-02-04
    oval:org.opensuse.security:def:6444
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:117873
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:108575
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:67533
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:96843
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:8353
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:118615
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:70775
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:111338
    P
    		Security update for the Linux Kernel (Important)
    2021-01-14
    oval:org.opensuse.security:def:64470
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:73592
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:102969
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:7070
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:95571
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:117938
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:108950
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:68159
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:10635
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:96163
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:119775
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:109519
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:117387
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:107872
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:65557
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:74625
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:95636
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:109015
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:5648
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:96297
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:109635
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:117770
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:108256
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:66737
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:75805
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:102853
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-14
    oval:org.opensuse.security:def:95954
    P
    		Security update for the Linux Kernel (Important)
    2021-01-13
    oval:org.opensuse.security:def:109333
    P
    		Security update for the Linux Kernel (Important)
    2021-01-13
    oval:org.opensuse.security:def:102667
    P
    		Security update for the Linux Kernel (Important)
    2021-01-13
    oval:org.opensuse.security:def:118424
    P
    		Security update for the Linux Kernel (Important)
    2021-01-13
    oval:org.opensuse.security:def:68791
    P
    		Security update for the Linux Kernel (Important)
    2021-01-13
    oval:org.opensuse.security:def:102625
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-12
    oval:org.opensuse.security:def:118377
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-12
    oval:org.opensuse.security:def:68669
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-12
    oval:org.opensuse.security:def:97350
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-12
    oval:org.opensuse.security:def:95912
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-12
    oval:org.opensuse.security:def:109291
    P
    		Security update for the Linux Kernel (Moderate)
    2021-01-12
    BACK
    linux linux kernel *
    debian debian linux 9.0
    debian debian linux 10.0