Vulnerability Name:

CVE-2021-3411 (CCN-197072)

Assigned:2021-02-19
Published:2021-02-19
Updated:2021-05-21
Summary:A flaw was found in the Linux kernel in versions prior to 5.10. A violation of memory access was found while detecting a padding of int3 in the linking state. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
CVSS v3 Severity:6.7 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)
5.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
6.7 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)
5.8 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:4.6 Medium (CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
6.8 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-94
Vulnerability Consequences:Gain Access
References:Source: MISC
Type: Exploit, Patch, Third Party Advisory
http://blog.pi3.com.pl/?p=831

Source: MITRE
Type: CNA
CVE-2021-3411

Source: MISC
Type: Exploit, Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1928236

Source: XF
Type: UNKNOWN
linux-kernel-cve20213411-code-exec(197072)

Source: CCN
Type: Linux Kernel Web site
Re: [PATCH] x86/kprobes: Fix optprobe to detect padding int3 correctly

Source: CCN
Type: oss-sec Mailing List, Fri, 19 Feb 2021 17:54:27 +0530
CVE-2021-3411 kernel: broken KRETPROBES reports corruption of .text section while running a FTRACE stress tester

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:* (Version < 5.10)

    • Configuration 2:
  • cpe:/o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/o:linux:linux_kernel:5.8:-:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    linux linux kernel *
    redhat enterprise linux 8.0
    linux linux kernel 5.8.0 -