Vulnerability Name:

CVE-2018-20819 (CCN-161654)

Assigned:2018-07-17
Published:2018-07-17
Updated:2020-08-24
Summary:io/ZlibCompression.cc in the decompression component in Dropbox Lepton 1.2.1 allows attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact by crafting a jpg image file. The root cause is a missing check of header payloads that may be (incorrectly) larger than the maximum file size.
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)
6.8 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:O/RC:C)
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
3.3 Low (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)
2.9 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C)
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): Low
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
1.7 Low (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-787
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2018-20819

Source: XF
Type: UNKNOWN
dropbox-lepton-cve201820819-dos(161654)

Source: CCN
Type: lepton GIT Repository
AddressSanitizer: heap-buffer-overflow at inflate.c:1170 #112

Source: MISC
Type: Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/dropbox/lepton/issues/112

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2018-20819

Vulnerable Configuration:Configuration 1:
  • cpe:/a:dropbox:lepton:1.2.1:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:dropbox:lepton:1.2.1:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.cosmic:def:201820819000
    V
    		CVE-2018-20819 on Ubuntu 18.10 (cosmic) - medium.
    2019-04-23
    oval:com.ubuntu.bionic:def:201820819000
    V
    		CVE-2018-20819 on Ubuntu 18.04 LTS (bionic) - medium.
    2019-04-23
    oval:com.ubuntu.cosmic:def:2018208190000000
    V
    		CVE-2018-20819 on Ubuntu 18.10 (cosmic) - medium.
    2019-04-23
    oval:com.ubuntu.bionic:def:2018208190000000
    V
    		CVE-2018-20819 on Ubuntu 18.04 LTS (bionic) - medium.
    2019-04-23
    BACK
    dropbox lepton 1.2.1
    dropbox lepton 1.2.1