Vulnerability Name:

CVE-2019-19815 (CCN-173219)

Assigned:2019-12-16
Published:2019-12-16
Updated:2020-01-03
Summary:In the Linux kernel 5.0.21, mounting a crafted f2fs filesystem image can cause a NULL pointer dereference in f2fs_recover_fsync_data in fs/f2fs/recovery.c. This is related to F2FS_P_SB in fs/f2fs/f2fs.h.
CVSS v3 Severity:5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)
4.9 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
4.0 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
3.5 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Low
CVSS v2 Severity:7.1 High (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
2.1 Low (CCN 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
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-476
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2019-19815

Source: XF
Type: UNKNOWN
linux-kernel-cve201919815-dos(173219)

Source: CCN
Type: GitHub Web site
CVE-2019-19815

Source: MISC
Type: Exploit, Third Party Advisory
https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19815

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/torvalds/linux/commit/4969c06a0d83c9c3dc50b8efcdc8eeedfce896f6#diff-41a7fa4590d2af87e82101f2b4dadb56

Source: CONFIRM
Type: UNKNOWN
https://security.netapp.com/advisory/ntap-20200103-0001/

Source: CCN
Type: Linux kernel Web site
The Linux Kernel Archives

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:5.0.21:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/o:linux:linux_kernel:5.0.21:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.disco:def:2019198150000000
    V
    		CVE-2019-19815 on Ubuntu 19.04 (disco) - low.
    2019-12-17
    oval:com.ubuntu.bionic:def:2019198150000000
    V
    		CVE-2019-19815 on Ubuntu 18.04 LTS (bionic) - low.
    2019-12-17
    oval:com.ubuntu.xenial:def:2019198150000000
    V
    		CVE-2019-19815 on Ubuntu 16.04 LTS (xenial) - low.
    2019-12-17
    BACK
    linux linux kernel 5.0.21
    linux linux kernel 5.0.21