CVE-2020-10751 - Insufficient Verification of Data Authenticity

Severity

61%

Complexity

18%

Confidentiality

70%

A flaw was found in the Linux kernels SELinux LSM hook implementation before version 5.7, where it incorrectly assumed that an skb would only contain a single netlink message. The hook would incorrectly only validate the first netlink message in the skb and allow or deny the rest of the messages within the skb with the granted permission without further processing.

CVSS 3.1 Base Score 6.1. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N).

CVSS 2.0 Base Score 3.6. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:P/I:P/A:N).

Overview

First reported 4 years ago

2020-05-26 15:15:00

Last updated 4 years ago

2020-07-15 19:15:00

Affected Software

RedHat Enterprise Linux Server 7.0

7.0

References

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10751

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fb73974172ffaaf57a7c42f35424d9aece1a5af6

https://lore.kernel.org/selinux/CACT4Y+b8HiV6KFuAPysZD=5hmyO4QisgxCKi4DHU3CfMPSP=yg@mail.gmail.com/

https://www.openwall.com/lists/oss-security/2020/04/30/5

[oss-security] 20200527 CVE-2020-10751 - Linux kernel: SELinux netlink permission check bypass

[oss-security] 20200527 CVE-2020-10751 - Linux kernel: SELinux netlink permission check bypass

Mailing List, Third Party Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10751

Issue Tracking, Patch, Third Party Advisory

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fb73974172ffaaf57a7c42f35424d9aece1a5af6

Patch, Vendor Advisory

https://lore.kernel.org/selinux/CACT4Y+b8HiV6KFuAPysZD=5hmyO4QisgxCKi4DHU3CfMPSP=yg@mail.gmail.com/

Mailing List, Vendor Advisory

https://www.openwall.com/lists/oss-security/2020/04/30/5

Mailing List, Third Party Advisory

[debian-lts-announce] 20200609 [SECURITY] [DLA 2241-1] linux security update

[debian-lts-announce] 20200610 [SECURITY] [DLA 2242-1] linux-4.9 security update

[debian-lts-announce] 20200610 [SECURITY] [DLA 2241-2] linux security update

DSA-4698

DSA-4699

openSUSE-SU-2020:0801

USN-4389-1

USN-4390-1

USN-4391-1

openSUSE-SU-2020:0935

USN-4413-1

USN-4412-1

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