Vulnerability Name:

CVE-2018-9918 (CCN-141521)

Assigned:2018-04-10
Published:2018-04-10
Updated:2019-10-03
Summary:libqpdf.a in QPDF through 8.0.2 mishandles certain "expected dictionary key but found non-name object" cases, allowing remote attackers to cause a denial of service (stack exhaustion), related to the QPDFObjectHandle and QPDF_Dictionary classes, because nesting in direct objects is not restricted.
CVSS v3 Severity:7.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
6.9 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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): High
Integrity (I): High
Availibility (A): High
5.5 Medium (CCN 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 (CCN 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
CVSS v2 Severity:6.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
4.6 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-674
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2018-9918

Source: XF
Type: UNKNOWN
qpdf-cve20189918-dos(141521)

Source: MISC
Type: Patch
https://github.com/qpdf/qpdf/commit/b4d6cf6836ce025ba1811b7bbec52680c7204223

Source: CCN
Type: qpdf GIT Repository
Segmentation Fault (stack exhaustion) on a crafted PDF file #202

Source: MISC
Type: Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/qpdf/qpdf/issues/202

Source: UBUNTU
Type: Third Party Advisory
USN-3638-1

Vulnerable Configuration:Configuration 1:
  • cpe:/a:qpdf_project:qpdf:*:*:*:*:*:*:*:* (Version <= 8.0.2)

    • Configuration 2:
  • cpe:/o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
  • OR cpe:/o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
  • OR cpe:/o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.artful:def:20189918000
    V
    		CVE-2018-9918 on Ubuntu 17.10 (artful) - low.
    2018-04-10
    oval:com.ubuntu.bionic:def:201899180000000
    V
    		CVE-2018-9918 on Ubuntu 18.04 LTS (bionic) - low.
    2018-04-10
    oval:com.ubuntu.bionic:def:20189918000
    V
    		CVE-2018-9918 on Ubuntu 18.04 LTS (bionic) - low.
    2018-04-10
    oval:com.ubuntu.xenial:def:201899180000000
    V
    		CVE-2018-9918 on Ubuntu 16.04 LTS (xenial) - low.
    2018-04-10
    oval:com.ubuntu.trusty:def:20189918000
    V
    		CVE-2018-9918 on Ubuntu 14.04 LTS (trusty) - low.
    2018-04-10
    oval:com.ubuntu.xenial:def:20189918000
    V
    		CVE-2018-9918 on Ubuntu 16.04 LTS (xenial) - low.
    2018-04-10
    BACK
    qpdf_project qpdf *
    canonical ubuntu linux 14.04
    canonical ubuntu linux 16.04
    canonical ubuntu linux 17.10