Vulnerability Name:

CVE-2019-9857 (CCN-158899)

Assigned:2019-03-11
Published:2019-03-11
Updated:2020-08-24
Summary:In the Linux kernel through 5.0.2, the function inotify_update_existing_watch() in fs/notify/inotify/inotify_user.c neglects to call fsnotify_put_mark() with IN_MASK_CREATE after fsnotify_find_mark(), which will cause a memory leak (aka refcount leak). Finally, this will cause a denial of service.
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)
4.8 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:U/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
6.2 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
5.4 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
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): High
CVSS v2 Severity:4.9 Medium (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
4.9 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-401
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2019-9857

Source: BID
Type: Third Party Advisory, VDB Entry
107527

Source: XF
Type: UNKNOWN
linux-kernel-cve20199857-dos(158899)

Source: CCN
Type: Linux Kernel GIT Repository
inotify: Fix fsnotify_mark refcount leak in inotify_update_existing_watch()

Source: MISC
Type: Patch, Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs.git/commit/?h=fsnotify&id=62c9d2674b31d4c8a674bee86b7edc6da2803aea

Source: FEDORA
Type: UNKNOWN
FEDORA-2019-65c6d11eba

Source: FEDORA
Type: UNKNOWN
FEDORA-2019-be9add5b77

Source: MISC
Type: Patch, Vendor Advisory
https://patchwork.kernel.org/patch/10836283/

Source: CONFIRM
Type: UNKNOWN
https://security.netapp.com/advisory/ntap-20190404-0002/

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:* (Version <= 5.0.2)

    • Configuration CCN 1:
  • cpe:/o:linux:linux_kernel:5.0.2:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.bionic:def:20199857000
    V
    		CVE-2019-9857 on Ubuntu 18.04 LTS (bionic) - medium.
    2019-03-21
    oval:com.ubuntu.cosmic:def:201998570000000
    V
    		CVE-2019-9857 on Ubuntu 18.10 (cosmic) - medium.
    2019-03-21
    oval:com.ubuntu.cosmic:def:20199857000
    V
    		CVE-2019-9857 on Ubuntu 18.10 (cosmic) - medium.
    2019-03-21
    oval:com.ubuntu.bionic:def:201998570000000
    V
    		CVE-2019-9857 on Ubuntu 18.04 LTS (bionic) - medium.
    2019-03-21
    oval:com.ubuntu.trusty:def:20199857000
    V
    		CVE-2019-9857 on Ubuntu 14.04 LTS (trusty) - medium.
    2019-03-21
    oval:com.ubuntu.xenial:def:201998570000000
    V
    		CVE-2019-9857 on Ubuntu 16.04 LTS (xenial) - medium.
    2019-03-21
    oval:com.ubuntu.xenial:def:20199857000
    V
    		CVE-2019-9857 on Ubuntu 16.04 LTS (xenial) - medium.
    2019-03-21
    BACK
    linux linux kernel *
    linux linux kernel 5.0.2