Common Weakness Enumeration
CWE-295
AllowedImproper Certificate Validation
Abstraction: Base · Status: Draft
The product does not validate, or incorrectly validates, a certificate.
2041 vulnerabilities reference this CWE, most recent first.
CVE-2023-29000 (GCVE-0-2023-29000)
Vulnerability from cvelistv5 – Published: 2023-04-04 12:53 – Updated: 2025-02-11 16:20
VLAI
EPSS
VEX
Title
Nextcloud Desktop client does not verify received singed certificate in end-to-end encryption
Summary
The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server. Starting with version 3.0.0 and prior to version 3.7.0, by trusting that the server will return a certificate that belongs to the keypair of the user, a malicious server could get the desktop client to encrypt files with a key known to the attacker. This issue is fixed in Nextcloud Desktop 3.7.0. No known workarounds are available.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-11 16:20 UTC
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/nextcloud/security-advisories/… | x_refsource_CONFIRM |
| https://github.com/nextcloud/desktop/pull/4949 | x_refsource_MISC |
| https://hackerone.com/reports/1679267 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| nextcloud | security-advisories |
Affected:
>= 3.0.0, < 3.7.0
|
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CVE-2023-28807 (GCVE-0-2023-28807)
Vulnerability from cvelistv5 – Published: 2024-01-31 19:16 – Updated: 2025-06-17 21:29
VLAI
EPSS
VEX
Title
Bypass of ZIA domain fronting detection module through evasion technique
Summary
In Zscaler Internet Access (ZIA) a mismatch between Connect Host and Client Hello's Server Name Indication (SNI) enables attackers to evade network security controls by hiding their communications within legitimate traffic.
Severity
5.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-03-14 21:06 UTC
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
Date Public
2024-02-01 02:00
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CVE-2023-28321 (GCVE-0-2023-28321)
Vulnerability from cvelistv5 – Published: 2023-05-26 00:00 – Updated: 2025-01-15 15:54
VLAI
EPSS
VEX
Summary
An improper certificate validation vulnerability exists in curl <v8.1.0 in the way it supports matching of wildcard patterns when listed as "Subject Alternative Name" in TLS server certificates. curl can be built to use its own name matching function for TLS rather than one provided by a TLS library. This private wildcard matching function would match IDN (International Domain Name) hosts incorrectly and could as a result accept patterns that otherwise should mismatch. IDN hostnames are converted to puny code before used for certificate checks. Puny coded names always start with `xn--` and should not be allowed to pattern match, but the wildcard check in curl could still check for `x*`, which would match even though the IDN name most likely contained nothing even resembling an `x`.
Severity
5.9 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-01-15 15:54 UTC
CWE
- CWE-295 - Improper Certificate Validation (CWE-295)
Assigner
References
12 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | https://github.com/curl/curl |
Affected:
Fixed in 8.1.0
|
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CVE-2023-28093 (GCVE-0-2023-28093)
Vulnerability from cvelistv5 – Published: 2023-04-10 00:00 – Updated: 2025-02-07 20:12
VLAI
EPSS
VEX
Summary
A user with a compromised configuration can start an unsigned binary as a service.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-07 20:12 UTC
CWE
- CWE-295 - Improper Certification Validation
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Pegasystems | RPA: Synchronization Engine |
Affected:
3.1.1 , < unspecified
(custom)
Affected: unspecified , < 3.1.28 (custom) |
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CVE-2023-24461 (GCVE-0-2023-24461)
Vulnerability from cvelistv5 – Published: 2023-05-03 14:31 – Updated: 2025-01-29 21:41
VLAI
EPSS
VEX
Title
BIG-IP Edge Client for Windows and macOS vulnerability
Summary
An improper certificate validation vulnerability exists in the BIG-IP Edge Client for Windows and macOS and may allow an attacker to impersonate a BIG-IP APM system. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-01-29 21:41 UTC
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://my.f5.com/manage/s/article/K000132539 | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| F5 | BIG-IP Edge Client |
Affected:
7.2.2 , < 7.2.4.1
(semver)
|
Date Public
2023-05-03 14:00
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CVE-2023-23546 (GCVE-0-2023-23546)
Vulnerability from cvelistv5 – Published: 2023-07-06 14:53 – Updated: 2024-08-02 10:35
VLAI
EPSS
VEX
Summary
A misconfiguration vulnerability exists in the urvpn_client functionality of Milesight UR32L v32.3.0.5. A specially-crafted man-in-the-middle attack can lead to increased privileges. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.
Severity
4.2 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-01 15:25 UTC
CWE
- CWE-295 - Improper Certificate Validation
Assigner
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CVE-2023-22642 (GCVE-0-2023-22642)
Vulnerability from cvelistv5 – Published: 2023-04-11 16:07 – Updated: 2024-10-23 14:28
VLAI
EPSS
VEX
Summary
An improper certificate validation vulnerability [CWE-295] in FortiAnalyzer and FortiManager 7.2.0 through 7.2.1, 7.0.0 through 7.0.5, 6.4.8 through 6.4.10 may allow a remote and unauthenticated attacker to perform a Man-in-the-Middle attack on the communication channel between the device and the remote FortiGuard server hosting outbreakalert ressources.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-23 14:11 UTC
CWE
- CWE-295 - Execute unauthorized code or commands
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Fortinet | FortiAnalyzer |
Affected:
7.2.0 , ≤ 7.2.1
(semver)
Affected: 7.0.0 , ≤ 7.0.5 (semver) Affected: 6.4.8 , ≤ 6.4.10 (semver) Affected: 6.4.0 , < 6.4.* (semver) |
|
| Fortinet | FortiManager |
Affected:
7.2.0 , ≤ 7.2.1
(semver)
Affected: 7.0.0 , ≤ 7.0.5 (semver) Affected: 6.4.8 , ≤ 6.4.10 (semver) Affected: 6.4.0 , < 6.4.* (semver) |
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CVE-2023-20881 (GCVE-0-2023-20881)
Vulnerability from cvelistv5 – Published: 2023-05-19 00:00 – Updated: 2025-01-21 20:04
VLAI
EPSS
VEX
Summary
Cloud foundry instances having CAPI version between 1.140 and 1.152.0 along with loggregator-agent v7+ may override other users syslog drain credentials if they're aware of the client certificate used for that syslog drain. This applies even if the drain has zero certs. This would allow the user to override the private key and add or modify a certificate authority used for the connection.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-01-21 20:04 UTC
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | Cloud Controller API |
Affected:
Cloud Foundry cloud controller API versions between 1.140 and 1.152.0 and loggregator-agent v7+
|
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CVE-2023-6680 (GCVE-0-2023-6680)
Vulnerability from cvelistv5 – Published: 2023-12-15 16:02 – Updated: 2026-06-06 04:06
VLAI
EPSS
VEX
Title
Improper Certificate Validation in GitLab
Summary
An improper certificate validation issue in Smartcard authentication in GitLab EE affecting all versions from 11.6 prior to 16.4.4, 16.5 prior to 16.5.4, and 16.6 prior to 16.6.2 allows an attacker to authenticate as another user given their public key if they use Smartcard authentication. Smartcard authentication is an experimental feature and has to be manually enabled by an administrator.
Severity
7.4 (High)
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://gitlab.com/gitlab-org/gitlab/-/issues/421607 | issue-tracking |
Impacted products
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CVE-2023-6058 (GCVE-0-2023-6058)
Vulnerability from cvelistv5 – Published: 2024-10-18 07:52 – Updated: 2024-10-18 15:26
VLAI
EPSS
VEX
Title
HTTPS Certificate Validation Issue in Bitdefender Safepay (VA-11167)
Summary
A vulnerability has been identified in Bitdefender Safepay's handling of HTTPS connections. The issue arises when the product blocks a connection due to an untrusted server certificate but allows the user to add the site to exceptions, resulting in the product trusting the certificate for subsequent HTTPS scans. This vulnerability allows an attacker to perform a Man-in-the-Middle (MITM) attack by using a self-signed certificate, which the product will trust after the site has been added to exceptions. This can lead to the interception and potential alteration of secure communications.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-18 15:26 UTC
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Bitdefender | Total Security |
Affected:
0 , < 27.0.25.115
(custom)
|
|
| bitdefender | total_security |
Affected:
0 , < 27.0.25.115
(custom)
cpe:2.3:a:bitdefender:total_security:*:*:*:*:*:*:*:* |
Date Public
2024-10-18 07:45
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Mitigation
Architecture and Design
Implementation
Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
Mitigation
Implementation
If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.
CAPEC-459: Creating a Rogue Certification Authority Certificate
An adversary exploits a weakness resulting from using a hashing algorithm with weak collision resistance to generate certificate signing requests (CSR) that contain collision blocks in their "to be signed" parts. The adversary submits one CSR to be signed by a trusted certificate authority then uses the signed blob to make a second certificate appear signed by said certificate authority. Due to the hash collision, both certificates, though different, hash to the same value and so the signed blob works just as well in the second certificate. The net effect is that the adversary's second X.509 certificate, which the Certification Authority has never seen, is now signed and validated by that Certification Authority.
CAPEC-475: Signature Spoofing by Improper Validation
An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.