Vulnerability Name:

CVE-2019-14855 (CCN-174202)

Assigned:2019-11-29
Published:2019-11-29
Updated:2022-11-08
Summary:A flaw was found in the way certificate signatures could be forged using collisions found in the SHA-1 algorithm. An attacker could use this weakness to create forged certificate signatures. This issue affects GnuPG versions before 2.2.18.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
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
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)
5.4 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: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): High
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
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-326
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2019-14855

Source: CCN
Type: Debian Bug report logs - #945859
gnupg2: CVE-2019-14855: Web of Trust forgeries using collisions in SHA-1 signatures

Source: CONFIRM
Type: Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14855

Source: MISC
Type: Vendor Advisory
https://dev.gnupg.org/T4755

Source: XF
Type: UNKNOWN
gnupg-cve201914855-weak-security(174202)

Source: CCN
Type: GnuPG Web site
GnuPG

Source: MISC
Type: Mailing List, Release Notes, Vendor Advisory
https://lists.gnupg.org/pipermail/gnupg-announce/2019q4/000442.html

Source: MISC
Type: Exploit, Third Party Advisory
https://rwc.iacr.org/2020/slides/Leurent.pdf

Source: UBUNTU
Type: Third Party Advisory
USN-4516-1

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2019-14855

Vulnerable Configuration:Configuration 1:
  • cpe:/a:gnupg:gnupg:*:*:*:*:*:*:*:* (Version < 2.2.18)

    • Configuration 2:
  • cpe:/o:fedoraproject:fedora:30:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:31:*:*:*:*:*:*:*

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

    • Configuration CCN 1:
  • cpe:/a:gnupg:gnupg:2.2.17:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:7482
    P
    		dirmngr-2.2.27-150300.3.5.1 on GA media (Moderate)
    2023-06-12
    oval:org.opensuse.security:def:94538
    P
    		dirmngr-2.2.27-1.2 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:2908
    P
    		dirmngr-2.2.27-1.2 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:44
    P
    		dirmngr-2.2.27-1.2 on GA media (Moderate)
    2022-06-13
    oval:org.opensuse.security:def:973
    P
    		Security update for chrony (Moderate)
    2022-03-15
    oval:org.opensuse.security:def:112155
    P
    		dirmngr-2.2.27-2.4 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:105691
    P
    		dirmngr-2.2.27-2.4 on GA media (Moderate)
    2021-10-01
    oval:org.opensuse.security:def:62062
    P
    		dirmngr-2.2.27-1.2 on GA media (Moderate)
    2021-08-09
    oval:org.opensuse.security:def:100820
    P
    		dirmngr-2.2.27-1.2 on GA media (Moderate)
    2021-08-09
    oval:org.opensuse.security:def:71803
    P
    		dirmngr-2.2.27-1.2 on GA media (Moderate)
    2021-08-09
    oval:com.ubuntu.disco:def:2019148550000000
    V
    		CVE-2019-14855 on Ubuntu 19.04 (disco) - low.
    2019-11-26
    oval:com.ubuntu.bionic:def:2019148550000000
    V
    		CVE-2019-14855 on Ubuntu 18.04 LTS (bionic) - low.
    2019-11-26
    oval:com.ubuntu.xenial:def:2019148550000000
    V
    		CVE-2019-14855 on Ubuntu 16.04 LTS (xenial) - low.
    2019-11-26
    BACK
    gnupg gnupg *
    fedoraproject fedora 30
    fedoraproject fedora 31
    canonical ubuntu linux 18.04
    gnupg gnupg 2.2.17