CVE-2018-21029
Systemd DNS Over TLS Certificate Spoofing Vulnerability
Description
systemd 239 through 245 accepts any certificate signed by a trusted certificate authority for DNS Over TLS. Server Name Indication (SNI) is not sent, and there is no hostname validation with the GnuTLS backend. NOTE: This has been disputed by the developer as not a vulnerability since hostname validation does not have anything to do with this issue (i.e. there is no hostname to be sent)
INFO
Published Date :
Oct. 30, 2019, 10:15 p.m.
Last Modified :
Aug. 5, 2024, 1:15 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
3.9
Affected Products
The following products are affected by CVE-2018-21029
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2018-21029.
| URL | Resource |
|---|---|
| https://blog.cloudflare.com/dns-encryption-explained/ | Third Party Advisory |
| https://github.com/systemd/systemd/blob/v239/man/resolved.conf.xml#L199-L207 | Exploit Third Party Advisory |
| https://github.com/systemd/systemd/blob/v243/man/resolved.conf.xml#L196-L207 | Exploit Third Party Advisory |
| https://github.com/systemd/systemd/blob/v243/src/resolve/resolved-dnstls-gnutls.c#L62-L63 | Patch Third Party Advisory |
| https://github.com/systemd/systemd/issues/9397 | Issue Tracking Third Party Advisory |
| https://github.com/systemd/systemd/pull/13870 | Patch Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4NLJVOJMB6ANDILRLDZK26YGLYBEPHKY/ | |
| https://security.netapp.com/advisory/ntap-20191122-0002/ | Third Party Advisory |
| https://tools.ietf.org/html/rfc7858#section-4.1 | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2018-21029 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2018-21029 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Aug. 05, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
May. 17, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Apr. 11, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Mar. 21, 2024
Action Type Old Value New Value Added Tag MITRE disputed -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Changed Description ** DISPUTED ** systemd 239 through 245 accepts any certificate signed by a trusted certificate authority for DNS Over TLS. Server Name Indication (SNI) is not sent, and there is no hostname validation with the GnuTLS backend. NOTE: This has been disputed by the developer as not a vulnerability since hostname validation does not have anything to do with this issue (i.e. there is no hostname to be sent). systemd 239 through 245 accepts any certificate signed by a trusted certificate authority for DNS Over TLS. Server Name Indication (SNI) is not sent, and there is no hostname validation with the GnuTLS backend. NOTE: This has been disputed by the developer as not a vulnerability since hostname validation does not have anything to do with this issue (i.e. there is no hostname to be sent) Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4NLJVOJMB6ANDILRLDZK26YGLYBEPHKY/ [No types assigned] Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/4NLJVOJMB6ANDILRLDZK26YGLYBEPHKY/ -
Reanalysis by [email protected]
Jul. 08, 2022
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:* versions from (including) 239 up to (including) 245 OR *cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:* versions from (including) 239 up to (excluding) 244 -
Modified Analysis by [email protected]
Apr. 18, 2022
Action Type Old Value New Value Changed Reference Type https://github.com/systemd/systemd/blob/v239/man/resolved.conf.xml#L199-L207 No Types Assigned https://github.com/systemd/systemd/blob/v239/man/resolved.conf.xml#L199-L207 Exploit, Third Party Advisory Changed Reference Type https://github.com/systemd/systemd/blob/v243/man/resolved.conf.xml#L196-L207 No Types Assigned https://github.com/systemd/systemd/blob/v243/man/resolved.conf.xml#L196-L207 Exploit, Third Party Advisory Changed Reference Type https://github.com/systemd/systemd/pull/13870 No Types Assigned https://github.com/systemd/systemd/pull/13870 Patch, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/4NLJVOJMB6ANDILRLDZK26YGLYBEPHKY/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/4NLJVOJMB6ANDILRLDZK26YGLYBEPHKY/ Mailing List, Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20191122-0002/ No Types Assigned https://security.netapp.com/advisory/ntap-20191122-0002/ Third Party Advisory Changed Reference Type https://tools.ietf.org/html/rfc7858#section-4.1 No Types Assigned https://tools.ietf.org/html/rfc7858#section-4.1 Third Party Advisory Changed CPE Configuration OR *cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:* versions from (including) 239 up to (excluding) 243 OR *cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:* versions from (including) 239 up to (including) 245 Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* -
CPE Deprecation Remap by [email protected]
Jan. 28, 2022
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:freedesktop:systemd:*:*:*:*:*:*:*:* versions from (including) 239 from (excluding) 243 OR *cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:* versions from (including) 239 from (excluding) 243 -
CVE Modified by [email protected]
Sep. 02, 2020
Action Type Old Value New Value Changed Description ** DISPUTED ** systemd 239 through 244 accepts any certificate signed by a trusted certificate authority for DNS Over TLS. Server Name Indication (SNI) is not sent, and there is no hostname validation with the GnuTLS backend. NOTE: This has been disputed by the developer as not a vulnerability since hostname validation does not have anything to do with this issue (i.e. there is no hostname to be sent). ** DISPUTED ** systemd 239 through 245 accepts any certificate signed by a trusted certificate authority for DNS Over TLS. Server Name Indication (SNI) is not sent, and there is no hostname validation with the GnuTLS backend. NOTE: This has been disputed by the developer as not a vulnerability since hostname validation does not have anything to do with this issue (i.e. there is no hostname to be sent). -
CVE Modified by [email protected]
Dec. 20, 2019
Action Type Old Value New Value Changed Description systemd 239 through 244 accepts any certificate signed by a trusted certificate authority for DNS Over TLS. Server Name Indication (SNI) is not sent, and there is no hostname validation with the GnuTLS backend. ** DISPUTED ** systemd 239 through 244 accepts any certificate signed by a trusted certificate authority for DNS Over TLS. Server Name Indication (SNI) is not sent, and there is no hostname validation with the GnuTLS backend. NOTE: This has been disputed by the developer as not a vulnerability since hostname validation does not have anything to do with this issue (i.e. there is no hostname to be sent). Added Reference https://tools.ietf.org/html/rfc7858#section-4.1 [No Types Assigned] Added Reference https://github.com/systemd/systemd/blob/v239/man/resolved.conf.xml#L199-L207 [No Types Assigned] Added Reference https://github.com/systemd/systemd/blob/v243/man/resolved.conf.xml#L196-L207 [No Types Assigned] -
CVE Modified by [email protected]
Nov. 25, 2019
Action Type Old Value New Value Changed Description systemd 239 through 243 accepts any certificate signed by a trusted certificate authority for DNS Over TLS. Server Name Indication (SNI) is not sent, and there is no hostname validation with the GnuTLS backend. systemd 239 through 244 accepts any certificate signed by a trusted certificate authority for DNS Over TLS. Server Name Indication (SNI) is not sent, and there is no hostname validation with the GnuTLS backend. Added Reference https://github.com/systemd/systemd/pull/13870 [No Types Assigned] -
CVE Modified by [email protected]
Nov. 22, 2019
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20191122-0002/ [No Types Assigned] -
CVE Modified by [email protected]
Nov. 21, 2019
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/4NLJVOJMB6ANDILRLDZK26YGLYBEPHKY/ [No Types Assigned] -
Initial Analysis by [email protected]
Nov. 06, 2019
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://blog.cloudflare.com/dns-encryption-explained/ No Types Assigned https://blog.cloudflare.com/dns-encryption-explained/ Third Party Advisory Changed Reference Type https://github.com/systemd/systemd/blob/v243/src/resolve/resolved-dnstls-gnutls.c#L62-L63 No Types Assigned https://github.com/systemd/systemd/blob/v243/src/resolve/resolved-dnstls-gnutls.c#L62-L63 Patch, Third Party Advisory Changed Reference Type https://github.com/systemd/systemd/issues/9397 No Types Assigned https://github.com/systemd/systemd/issues/9397 Issue Tracking, Third Party Advisory Added CWE NIST CWE-295 Added CPE Configuration OR *cpe:2.3:a:freedesktop:systemd:*:*:*:*:*:*:*:* versions from (including) 239 up to (excluding) 243
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2018-21029 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2018-21029
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.84 }} 0.03%
score
0.82524
percentile