Vulnerability Name:

CVE-2018-20969 (CCN-165397)

Assigned:2018-04-06
Published:2018-04-06
Updated:2019-09-05
Summary:do_ed_script in pch.c in GNU patch through 2.7.6 does not block strings beginning with a ! character.
Note: this is the same commit as for CVE-2019-13638, but the ! syntax is specific to ed, and is unrelated to a shell metacharacter.
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)
7.0 High (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:P/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
8.4 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
7.6 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/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): High
Availibility (A): High
7.8 High (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
7.0 High (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/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): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:9.3 High (CVSS v2 Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
7.2 High (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-78
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2018-20969

Source: MISC
Type: Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/154124/GNU-patch-Command-Injection-Directory-Traversal.html

Source: REDHAT
Type: UNKNOWN
RHSA-2019:2798

Source: REDHAT
Type: UNKNOWN
RHSA-2019:2964

Source: REDHAT
Type: UNKNOWN
RHSA-2019:3757

Source: REDHAT
Type: UNKNOWN
RHSA-2019:3758

Source: REDHAT
Type: UNKNOWN
RHSA-2019:4061

Source: XF
Type: UNKNOWN
gnupatch-cve201820969-cmd-exec(165397)

Source: CCN
Type: patch GIT Repository
Invoke ed directly instead of using the shell

Source: MISC
Type: Patch, Vendor Advisory
https://git.savannah.gnu.org/cgit/patch.git/commit/?id=3fcd042d26d70856e826a42b5f93dc4854d80bf0

Source: MISC
Type: UNKNOWN
https://github.com/irsl/gnu-patch-vulnerabilities

Source: CCN
Type: Packet Storm Security [08-16-2019]
GNU patch Command Injection / Directory Traversal

Source: BUGTRAQ
Type: Exploit, Mailing List, Patch, Third Party Advisory
20190816 Details about recent GNU patch vulnerabilities

Vulnerable Configuration:Configuration 1:
  • cpe:/a:gnu:patch:*:*:*:*:*:*:*:* (Version <= 2.7.6)

    • Configuration RedHat 1:
  • cpe:/o:redhat:enterprise_linux:8:*:*:*:*:*:*:*

    • Configuration RedHat 2:
  • cpe:/o:redhat:enterprise_linux:8::baseos:*:*:*:*:*

    • Configuration RedHat 3:
  • cpe:/o:redhat:enterprise_linux:7:*:*:*:*:*:*:*

    • Configuration RedHat 4:
  • cpe:/o:redhat:enterprise_linux:7::client:*:*:*:*:*

    • Configuration RedHat 5:
  • cpe:/o:redhat:enterprise_linux:7::computenode:*:*:*:*:*

    • Configuration RedHat 6:
  • cpe:/o:redhat:enterprise_linux:7::server:*:*:*:*:*

    • Configuration RedHat 7:
  • cpe:/o:redhat:enterprise_linux:7::workstation:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:gnu:patch:2.7.6:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.redhat.rhsa:def:20192964
    P
    		RHSA-2019:2964: patch security update (Important)
    2019-10-03
    oval:com.redhat.rhsa:def:20192798
    P
    		RHSA-2019:2798: patch security update (Important)
    2019-09-19
    oval:com.ubuntu.disco:def:2018209690000000
    V
    		CVE-2018-20969 on Ubuntu 19.04 (disco) - medium.
    2019-08-16
    oval:com.ubuntu.bionic:def:2018209690000000
    V
    		CVE-2018-20969 on Ubuntu 18.04 LTS (bionic) - medium.
    2019-08-16
    oval:com.ubuntu.xenial:def:2018209690000000
    V
    		CVE-2018-20969 on Ubuntu 16.04 LTS (xenial) - medium.
    2019-08-16
    BACK
    gnu patch *
    gnu patch 2.7.6