Common Weakness Enumeration
CWE-203
AllowedObservable Discrepancy
Abstraction: Base · Status: Incomplete
The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.
835 vulnerabilities reference this CWE, most recent first.
CVE-2021-29621 (GCVE-0-2021-29621)
Vulnerability from cvelistv5 – Published: 2021-06-07 19:00 – Updated: 2024-08-03 22:11
VLAI
EPSS
VEX
Title
Observable Response Discrepancy in Flask-AppBuilder
Summary
Flask-AppBuilder is a development framework, built on top of Flask. User enumeration in database authentication in Flask-AppBuilder <= 3.2.3. Allows for a non authenticated user to enumerate existing accounts by timing the response time from the server when you are logging in. Upgrade to version 3.3.0 or higher to resolve.
Severity
5.3 (Medium)
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/dpgaspar/Flask-AppBuilder/secu… | x_refsource_CONFIRM |
| https://github.com/dpgaspar/Flask-AppBuilder/comm… | x_refsource_MISC |
| https://pypi.org/project/Flask-AppBuilder/ | x_refsource_MISC |
| https://lists.apache.org/thread.html/r5b754118ba4… | mailing-listx_refsource_MLIST |
| https://lists.apache.org/thread.html/r466759f3776… | mailing-listx_refsource_MLIST |
| https://lists.apache.org/thread.html/r91067f95390… | mailing-listx_refsource_MLIST |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| dpgaspar | Flask-AppBuilder |
Affected:
< 3.3.0
|
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CVE-2021-29446 (GCVE-0-2021-29446)
Vulnerability from cvelistv5 – Published: 2021-04-16 22:00 – Updated: 2024-08-03 22:02
VLAI
EPSS
VEX
Title
Padding Oracle Attack due to Observable Timing Discrepancy in jose-node-cjs-runtime
Summary
jose-node-cjs-runtime is an npm package which provides a number of cryptographic functions. In versions prior to 3.11.4 the AES_CBC_HMAC_SHA2 Algorithm (A128CBC-HS256, A192CBC-HS384, A256CBC-HS512) decryption would always execute both HMAC tag verification and CBC decryption, if either failed `JWEDecryptionFailed` would be thrown. But a possibly observable difference in timing when padding error would occur while decrypting the ciphertext makes a padding oracle and an adversary might be able to make use of that oracle to decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block). A patch was released which ensures the HMAC tag is verified before performing CBC decryption. The fixed versions are `>=3.11.4`. Users should upgrade to `^3.11.4`.
Severity
5.9 (Medium)
CWE
- CWE-203 - {"CWE-203":"Observable Discrepancy"}
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/panva/jose/security/advisories… | x_refsource_CONFIRM |
| https://www.npmjs.com/package/jose-node-cjs-runtime | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| panva | jose-node-cjs-runtime |
Affected:
< 3.11.4
|
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CVE-2021-29445 (GCVE-0-2021-29445)
Vulnerability from cvelistv5 – Published: 2021-04-16 21:50 – Updated: 2024-08-03 22:02
VLAI
EPSS
VEX
Title
Padding Oracle Attack due to Observable Timing Discrepancy in jose-node-esm-runtime
Summary
jose-node-esm-runtime is an npm package which provides a number of cryptographic functions. In versions prior to 3.11.4 the AES_CBC_HMAC_SHA2 Algorithm (A128CBC-HS256, A192CBC-HS384, A256CBC-HS512) decryption would always execute both HMAC tag verification and CBC decryption, if either failed `JWEDecryptionFailed` would be thrown. But a possibly observable difference in timing when padding error would occur while decrypting the ciphertext makes a padding oracle and an adversary might be able to make use of that oracle to decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block). A patch was released which ensures the HMAC tag is verified before performing CBC decryption. The fixed versions are `>=3.11.4`. Users should upgrade to `^3.11.4`.
Severity
5.9 (Medium)
CWE
- CWE-203 - {"CWE-203":"Observable Discrepancy"}
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/panva/jose/security/advisories… | x_refsource_CONFIRM |
| https://www.npmjs.com/package/jose-node-esm-runtime | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| panva | jose-node-esm-runtime |
Affected:
< 3.11.4
|
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CVE-2021-29444 (GCVE-0-2021-29444)
Vulnerability from cvelistv5 – Published: 2021-04-16 21:45 – Updated: 2024-08-03 22:02
VLAI
EPSS
VEX
Title
Padding Oracle Attack due to Observable Timing Discrepancy in jose-browser-runtime
Summary
jose-browser-runtime is an npm package which provides a number of cryptographic functions. In versions prior to 3.11.4 the AES_CBC_HMAC_SHA2 Algorithm (A128CBC-HS256, A192CBC-HS384, A256CBC-HS512) decryption would always execute both HMAC tag verification and CBC decryption, if either failed `JWEDecryptionFailed` would be thrown. But a possibly observable difference in timing when padding error would occur while decrypting the ciphertext makes a padding oracle and an adversary might be able to make use of that oracle to decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block). A patch was released which ensures the HMAC tag is verified before performing CBC decryption. The fixed versions are `>=3.11.4`. Users should upgrade to `^3.11.4`.
Severity
5.9 (Medium)
CWE
- CWE-203 - {"CWE-203":"Observable Discrepancy"}
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/panva/jose/security/advisories… | x_refsource_CONFIRM |
| https://www.npmjs.com/package/jose-browser-runtime | x_refsource_MISC |
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CVE-2021-29443 (GCVE-0-2021-29443)
Vulnerability from cvelistv5 – Published: 2021-04-16 17:35 – Updated: 2024-08-03 22:02
VLAI
EPSS
VEX
Title
Padding Oracle Attack due to Observable Timing Discrepancy in jose
Summary
jose is an npm library providing a number of cryptographic operations. In vulnerable versions AES_CBC_HMAC_SHA2 Algorithm (A128CBC-HS256, A192CBC-HS384, A256CBC-HS512) decryption would always execute both HMAC tag verification and CBC decryption, if either failed `JWEDecryptionFailed` would be thrown. A possibly observable difference in timing when padding error would occur while decrypting the ciphertext makes a padding oracle and an adversary might be able to make use of that oracle to decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block). All major release versions have had a patch released which ensures the HMAC tag is verified before performing CBC decryption. The fixed versions are `^1.28.1 || ^2.0.5 || >=3.11.4`. Users should upgrade their v1.x dependency to ^1.28.1, their v2.x dependency to ^2.0.5, and their v3.x dependency to ^3.11.4. Thanks to Jason from Microsoft Vulnerability Research (MSVR) for bringing this up and Eva Sarafianou (@esarafianou) for helping to score this advisory.
Severity
5.9 (Medium)
CWE
- CWE-203 - {"CWE-203":"Observable Discrepancy"}
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/panva/jose/security/advisories… | x_refsource_CONFIRM |
| https://www.npmjs.com/package/jose | x_refsource_MISC |
Impacted products
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CVE-2021-24651 (GCVE-0-2021-24651)
Vulnerability from cvelistv5 – Published: 2021-10-11 10:45 – Updated: 2024-08-03 19:35
VLAI
EPSS
VEX
Title
Poll Maker < 3.4.2 - Unauthenticated Time Based SQL Injection
Summary
The Poll Maker WordPress plugin before 3.4.2 allows unauthenticated users to perform SQL injection via the ays_finish_poll AJAX action. While the result is not disclosed in the response, it is possible to use a timing attack to exfiltrate data such as password hash.
Severity
No CVSS data available.
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://wpscan.com/vulnerability/24f933b0-ad57-4e… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Unknown | Poll Maker |
Affected:
3.4.2 , < 3.4.2
(custom)
|
Credits
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CVE-2021-4286 (GCVE-0-2021-4286)
Vulnerability from cvelistv5 – Published: 2022-12-27 10:21 – Updated: 2025-04-11 16:46
VLAI
EPSS
VEX
Title
cocagne pysrp _ctsrp.py calculate_x information exposure
Summary
A vulnerability, which was classified as problematic, has been found in cocagne pysrp up to 1.0.16. This issue affects the function calculate_x of the file srp/_ctsrp.py. The manipulation leads to information exposure through discrepancy. Upgrading to version 1.0.17 is able to address this issue. The name of the patch is dba52642f5e95d3da7af1780561213ee6053195f. It is recommended to upgrade the affected component. The associated identifier of this vulnerability is VDB-216875.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-203 - Information Exposure Through Discrepancy
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.216875 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.216875 | signaturepermissions-required |
| https://github.com/cocagne/pysrp/pull/43 | issue-tracking |
| https://github.com/cocagne/pysrp/commit/dba52642f… | patch |
| https://github.com/cocagne/pysrp/releases/tag/1.0.17 | patch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| cocagne | pysrp |
Affected:
1.0.0
Affected: 1.0.1 Affected: 1.0.2 Affected: 1.0.3 Affected: 1.0.4 Affected: 1.0.5 Affected: 1.0.6 Affected: 1.0.7 Affected: 1.0.8 Affected: 1.0.9 Affected: 1.0.10 Affected: 1.0.11 Affected: 1.0.12 Affected: 1.0.13 Affected: 1.0.14 Affected: 1.0.15 Affected: 1.0.16 |
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CVE-2021-3642 (GCVE-0-2021-3642)
Vulnerability from cvelistv5 – Published: 2021-08-05 20:48 – Updated: 2024-08-03 17:01
VLAI
EPSS
VEX
Summary
A flaw was found in Wildfly Elytron in versions prior to 1.10.14.Final, prior to 1.15.5.Final and prior to 1.16.1.Final where ScramServer may be susceptible to Timing Attack if enabled. The highest threat of this vulnerability is confidentiality.
Severity
No CVSS data available.
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1981407 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | wildfly-elytron |
Affected:
Wildfly Elytron 1.10.14.Final, Wildfly Elytron 1.15.5.Final, Wildfly Elytron 1.16.1.Final
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CVE-2021-1486 (GCVE-0-2021-1486)
Vulnerability from cvelistv5 – Published: 2021-05-06 12:41 – Updated: 2024-11-08 23:20
VLAI
EPSS
VEX
Title
Cisco SD-WAN vManage HTTP Authentication User Enumeration Vulnerability
Summary
A vulnerability in Cisco SD-WAN vManage Software could allow an unauthenticated, remote attacker to enumerate user accounts. This vulnerability is due to the improper handling of HTTP headers. An attacker could exploit this vulnerability by sending authenticated requests to an affected system. A successful exploit could allow the attacker to compare the HTTP responses that are returned by the affected system to determine which accounts are valid user accounts.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://tools.cisco.com/security/center/content/C… | vendor-advisoryx_refsource_CISCO |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco SD-WAN vManage |
Affected:
n/a
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Date Public
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CVE-2020-36888 (GCVE-0-2020-36888)
Vulnerability from cvelistv5 – Published: 2025-12-10 20:51 – Updated: 2025-12-11 18:53
VLAI
EPSS
VEX
Title
SpinetiX Fusion Digital Signage 3.4.8 Username Enumeration via Login Script
Summary
SpinetiX Fusion Digital Signage 3.4.8 contains a username enumeration vulnerability in its login script that allows attackers to identify valid user accounts. Attackers can send crafted login requests with different usernames to distinguish between existing and non-existing accounts by analyzing the server's error responses.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://www.exploit-db.com/exploits/48847 | exploit |
| https://www.spinetix.com | product |
| https://www.zeroscience.mk/en/vulnerabilities/ZSL… | vendor-advisoryvdb-entry |
| https://www.vulncheck.com/advisories/spinetix-fus… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| SpenetiX AG | Fusion Digital Signage |
Affected:
0 , ≤ 3.4.8
(semver)
|
Date Public
2020-09-30 00:00
Credits
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Mitigation MIT-46
Architecture and Design
Strategy: Separation of Privilege
- Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
- Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
Mitigation MIT-39
Implementation
- Ensure that error messages only contain minimal details that are useful to the intended audience and no one else. The messages need to strike the balance between being too cryptic (which can confuse users) or being too detailed (which may reveal more than intended). The messages should not reveal the methods that were used to determine the error. Attackers can use detailed information to refine or optimize their original attack, thereby increasing their chances of success.
- If errors must be captured in some detail, record them in log messages, but consider what could occur if the log messages can be viewed by attackers. Highly sensitive information such as passwords should never be saved to log files.
- Avoid inconsistent messaging that might accidentally tip off an attacker about internal state, such as whether a user account exists or not.
CAPEC-189: Black Box Reverse Engineering
An adversary discovers the structure, function, and composition of a type of computer software through black box analysis techniques. 'Black Box' methods involve interacting with the software indirectly, in the absence of direct access to the executable object. Such analysis typically involves interacting with the software at the boundaries of where the software interfaces with a larger execution environment, such as input-output vectors, libraries, or APIs. Black Box Reverse Engineering also refers to gathering physical side effects of a hardware device, such as electromagnetic radiation or sounds.