Vulnerability Name:

CVE-2020-8793 (CCN-176750)

Assigned:2020-02-25
Published:2020-02-25
Updated:2022-01-01
Summary:OpenSMTPD before 6.6.4 allows local users to read arbitrary files (e.g., on some Linux distributions) because of a combination of an untrusted search path in makemap.c and race conditions in the offline functionality in smtpd.c.
CVSS v3 Severity:4.7 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N)
4.2 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
6.2 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
5.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/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): High
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:4.7 Medium (CVSS v2 Vector: AV:L/AC:M/Au:N/C:C/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): None
Availibility (A): None
4.9 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:C/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-426
CWE-367
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2020-8793

Source: FULLDISC
Type: Mailing List, Third Party Advisory
20200227 Local information disclosure in OpenSMTPD (CVE-2020-8793)

Source: MLIST
Type: Exploit, Mailing List, Third Party Advisory
[oss-security] 20200224 Local information disclosure in OpenSMTPD (CVE-2020-8793)

Source: XF
Type: UNKNOWN
opensmtpd-cve20208793-info-disc(176750)

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2020-b92d7083ca

Source: CCN
Type: Packet Storm Security [02-25-2020]
OpenSMTPD Local Information Disclosure

Source: UBUNTU
Type: Third Party Advisory
USN-4294-1

Source: EXPLOIT-DB
Type: EXPLOIT
Offensive Security Exploit Database [02-26-2020]

Source: MISC
Type: Third Party Advisory
https://www.openbsd.org/security.html

Source: CCN
Type: OpenSMTPD Web site
OpenSMTPD

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2020-8793

Vulnerable Configuration:Configuration 1:
  • cpe:/a:opensmtpd:opensmtpd:*:*:*:*:*:*:*:* (Version < 6.6.4)

    • Configuration 2:
  • cpe:/o:fedoraproject:fedora:32:*:*:*:*:*:*:*

    • Configuration 3:
  • cpe:/o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
  • OR cpe:/o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:opensmtpd:opensmtpd:6.6.0:-:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.bionic:def:202087930000000
    V
    		CVE-2020-8793 on Ubuntu 18.04 LTS (bionic) - low.
    2020-02-25
    oval:com.ubuntu.xenial:def:202087930000000
    V
    		CVE-2020-8793 on Ubuntu 16.04 LTS (xenial) - low.
    2020-02-25
    BACK
    opensmtpd opensmtpd *
    fedoraproject fedora 32
    canonical ubuntu linux 18.04
    canonical ubuntu linux 19.10
    opensmtpd opensmtpd 6.6.0 -