4.7

CVE-2020-27170

An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-f232326f6966. This affects pointer types that do not define a ptr_limit.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version < 5.11.8
Fedoraproject ≫ Fedora Version 32
Fedoraproject ≫ Fedora Version 33
Fedoraproject ≫ Fedora Version 34
Canonical ≫ Ubuntu Linux Version 14.04 SwEdition esm
Canonical ≫ Ubuntu Linux Version 16.04 SwEdition lts
Canonical ≫ Ubuntu Linux Version 18.04 SwEdition lts
Canonical ≫ Ubuntu Linux Version 20.04 SwEdition lts
Debian ≫ Debian Linux Version 9.0
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.57% 0.424
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 4.7 1 3.6
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
NIST 1.9 3.4 2.9
AV:L/AC:M/Au:N/C:P/I:N/A:N
CWE-203 Observable Discrepancy

The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.

http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html
Third Party Advisory
VDB Entry
https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html
Third Party Advisory
Mailing List
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.8
Patch
Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FB6LUXPEIRLZH32YXWZVEZAD4ZL6SDK2/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QRTPQE73ANG7D6M4L4PK5ZQDPO4Y2FVD/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T2S3I4SLRNRUQDOFYUS6IUAZMQNMPNLG/
http://www.openwall.com/lists/oss-security/2021/03/24/4
Third Party Advisory
Mailing List
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f232326f6966cf2a1d1db7bc917a4ce5f9f55f76
Patch
Vendor Advisory
https://www.openwall.com/lists/oss-security/2021/03/19/2
Patch
Third Party Advisory
Mailing List