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.
836 vulnerabilities reference this CWE, most recent first.
GHSA-P484-H86R-HVJ6
Vulnerability from github – Published: 2023-10-30 18:30 – Updated: 2023-11-06 18:30In Package Manager Service, there is a possible way to determine whether an app is installed, without query permissions, due to side channel information disclosure. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.
{
"affected": [],
"aliases": [
"CVE-2023-21326"
],
"database_specific": {
"cwe_ids": [
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-10-30T17:15:49Z",
"severity": "MODERATE"
},
"details": "In Package Manager Service, there is a possible way to determine whether an app is installed, without query permissions, due to side channel information disclosure. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.",
"id": "GHSA-p484-h86r-hvj6",
"modified": "2023-11-06T18:30:18Z",
"published": "2023-10-30T18:30:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-21326"
},
{
"type": "WEB",
"url": "https://source.android.com/docs/security/bulletin/android-14"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-P52G-CM5J-MJV4
Vulnerability from github – Published: 2023-02-08 22:31 – Updated: 2025-11-04 22:08A timing based side channel exists in the OpenSSL RSA Decryption implementation which could be sufficient to recover a plaintext across a network in a Bleichenbacher style attack. To achieve a successful decryption an attacker would have to be able to send a very large number of trial messages for decryption. The vulnerability affects all RSA padding modes: PKCS#1 v1.5, RSA-OEAP and RSASVE.
For example, in a TLS connection, RSA is commonly used by a client to send an encrypted pre-master secret to the server. An attacker that had observed a genuine connection between a client and a server could use this flaw to send trial messages to the server and record the time taken to process them. After a sufficiently large number of messages the attacker could recover the pre-master secret used for the original connection and thus be able to decrypt the application data sent over that connection.
{
"affected": [
{
"package": {
"ecosystem": "crates.io",
"name": "openssl-src"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "111.25.0"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "crates.io",
"name": "openssl-src"
},
"ranges": [
{
"events": [
{
"introduced": "300.0.0"
},
{
"fixed": "300.0.12"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2022-4304"
],
"database_specific": {
"cwe_ids": [
"CWE-203"
],
"github_reviewed": true,
"github_reviewed_at": "2023-02-08T22:31:42Z",
"nvd_published_at": "2023-02-08T20:15:00Z",
"severity": "MODERATE"
},
"details": "A timing based side channel exists in the OpenSSL RSA Decryption implementation which could be sufficient to recover a plaintext across a network in a Bleichenbacher style attack. To achieve a successful decryption an attacker would have to be able to send a very large number of trial messages for decryption. The vulnerability affects all RSA padding modes: PKCS#1 v1.5, RSA-OEAP and RSASVE.\n\nFor example, in a TLS connection, RSA is commonly used by a client to send an encrypted pre-master secret to the server. An attacker that had observed a genuine connection between a client and a server could use this flaw to send trial messages to the server and record the time taken to process them. After a sufficiently large number of messages the attacker could recover the pre-master secret used for the original connection and thus be able to decrypt the application data sent over that connection.",
"id": "GHSA-p52g-cm5j-mjv4",
"modified": "2025-11-04T22:08:29Z",
"published": "2023-02-08T22:31:42Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-4304"
},
{
"type": "WEB",
"url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0003"
},
{
"type": "WEB",
"url": "https://rustsec.org/advisories/RUSTSEC-2023-0007.html"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202402-08"
},
{
"type": "WEB",
"url": "https://www.openssl.org/news/secadv/20230207.txt"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
],
"summary": "openssl-src subject to Timing Oracle in RSA Decryption"
}
GHSA-P694-Q9QW-Q238
Vulnerability from github – Published: 2022-05-13 01:05 – Updated: 2022-05-13 01:05The implementations of EAP-PWD in hostapd and wpa_supplicant are vulnerable to side-channel attacks as a result of cache access patterns. All versions of hostapd and wpa_supplicant with EAP-PWD support are vulnerable. The ability to install and execute applications is necessary for a successful attack. Memory access patterns are visible in a shared cache. Weak passwords may be cracked. Versions of hostapd/wpa_supplicant 2.7 and newer, are not vulnerable to the timing attack described in CVE-2019-9494. Both hostapd with EAP-pwd support and wpa_supplicant with EAP-pwd support prior to and including version 2.7 are affected.
{
"affected": [],
"aliases": [
"CVE-2019-9495"
],
"database_specific": {
"cwe_ids": [
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-04-17T14:29:00Z",
"severity": "MODERATE"
},
"details": "The implementations of EAP-PWD in hostapd and wpa_supplicant are vulnerable to side-channel attacks as a result of cache access patterns. All versions of hostapd and wpa_supplicant with EAP-PWD support are vulnerable. The ability to install and execute applications is necessary for a successful attack. Memory access patterns are visible in a shared cache. Weak passwords may be cracked. Versions of hostapd/wpa_supplicant 2.7 and newer, are not vulnerable to the timing attack described in CVE-2019-9494. Both hostapd with EAP-pwd support and wpa_supplicant with EAP-pwd support prior to and including version 2.7 are affected.",
"id": "GHSA-p694-q9qw-q238",
"modified": "2022-05-13T01:05:20Z",
"published": "2022-05-13T01:05:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-9495"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2019/07/msg00030.html"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/56OBBOJJSKRTDGEXZOVFSTP4HDSDBLAE"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SVMJOFEYBGXZLFF5IOLW67SSOPKFEJP3"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TDOZGR3T7FVO5JSZWK2QPR7AOFIEJTIZ"
},
{
"type": "WEB",
"url": "https://seclists.org/bugtraq/2019/May/40"
},
{
"type": "WEB",
"url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-19:03.wpa.asc"
},
{
"type": "WEB",
"url": "https://w1.fi/security/2019-2"
},
{
"type": "WEB",
"url": "https://www.synology.com/security/advisory/Synology_SA_19_16"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00021.html"
},
{
"type": "WEB",
"url": "http://packetstormsecurity.com/files/152914/FreeBSD-Security-Advisory-FreeBSD-SA-19-03.wpa.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-P6HF-7WM2-3XG4
Vulnerability from github – Published: 2022-05-24 17:09 – Updated: 2024-04-04 02:48LabVantage LIMS 8.3 does not properly maintain the confidentiality of database names. For example, the web application exposes the database name. An attacker might be able to enumerate database names by providing his own database name in a request, because the response will return an 'Unrecognized Database exception message if the database does not exist.
{
"affected": [],
"aliases": [
"CVE-2020-7959"
],
"database_specific": {
"cwe_ids": [
"CWE-200",
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-02-17T21:15:00Z",
"severity": "MODERATE"
},
"details": "LabVantage LIMS 8.3 does not properly maintain the confidentiality of database names. For example, the web application exposes the database name. An attacker might be able to enumerate database names by providing his own database name in a request, because the response will return an \u0026#39;Unrecognized Database exception message if the database does not exist.",
"id": "GHSA-p6hf-7wm2-3xg4",
"modified": "2024-04-04T02:48:15Z",
"published": "2022-05-24T17:09:10Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-7959"
},
{
"type": "WEB",
"url": "https://github.com/websecnl/LabVantage8.3-Exploit"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/exploits/48090"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-P6R5-883M-2C48
Vulnerability from github – Published: 2025-02-11 12:30 – Updated: 2025-02-11 12:30The login functionality of the web server in affected devices does not normalize the response times of login attempts. An unauthenticated remote attacker could exploit this side-channel information to distinguish between valid and invalid usernames.
{
"affected": [],
"aliases": [
"CVE-2023-37482"
],
"database_specific": {
"cwe_ids": [
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-11T11:15:11Z",
"severity": "MODERATE"
},
"details": "The login functionality of the web server in affected devices does not normalize the response times of login attempts. An unauthenticated remote attacker could exploit this side-channel information to distinguish between valid and invalid usernames.",
"id": "GHSA-p6r5-883m-2c48",
"modified": "2025-02-11T12:30:54Z",
"published": "2025-02-11T12:30:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-37482"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-195895.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-P6W3-X67F-Q79Q
Vulnerability from github – Published: 2025-03-29 00:31 – Updated: 2025-03-29 00:31IBM InfoSphere Information Server 11.7
could allow an authenticated to obtain sensitive username information due to an observable response discrepancy.
{
"affected": [],
"aliases": [
"CVE-2024-51477"
],
"database_specific": {
"cwe_ids": [
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-03-29T00:15:23Z",
"severity": "MODERATE"
},
"details": "IBM InfoSphere Information Server 11.7 \n\ncould allow an authenticated to obtain sensitive username information due to an observable response discrepancy.",
"id": "GHSA-p6w3-x67f-q79q",
"modified": "2025-03-29T00:31:36Z",
"published": "2025-03-29T00:31:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-51477"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/7185058"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-P72H-2892-8MJC
Vulnerability from github – Published: 2022-05-24 17:04 – Updated: 2024-04-04 02:44GnuTLS incorrectly validates the first byte of padding in CBC modes
{
"affected": [],
"aliases": [
"CVE-2015-8313"
],
"database_specific": {
"cwe_ids": [
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-12-20T14:15:00Z",
"severity": "MODERATE"
},
"details": "GnuTLS incorrectly validates the first byte of padding in CBC modes",
"id": "GHSA-p72h-2892-8mjc",
"modified": "2024-04-04T02:44:41Z",
"published": "2022-05-24T17:04:48Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2015-8313"
},
{
"type": "WEB",
"url": "https://blog.hboeck.de/archives/877-A-little-POODLE-left-in-GnuTLS-old-versions.html"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2015-8313"
},
{
"type": "WEB",
"url": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2015-8313"
},
{
"type": "WEB",
"url": "https://security-tracker.debian.org/tracker/CVE-2015-8313"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2015/dsa-3408"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/archive/1/537012/100/0/threaded"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/78327"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-P7JQ-V8JP-J424
Vulnerability from github – Published: 2021-04-19 14:50 – Updated: 2021-04-16 23:15Non-constant-time comparison of CSRF tokens in endpoint request handler in com.vaadin:flow-server versions 3.0.0 through 5.0.3 (Vaadin 15.0.0 through 18.0.6), and com.vaadin:fusion-endpoint version 6.0.0 (Vaadin 19.0.0) allows attacker to guess a security token for Fusion endpoints via timing attack.
- https://vaadin.com/security/cve-2021-31406
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "com.vaadin:flow-server"
},
"ranges": [
{
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "5.0.4"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.vaadin:flow-server"
},
"ranges": [
{
"events": [
{
"introduced": "6.0.0"
},
{
"fixed": "6.0.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.0.0"
]
}
],
"aliases": [
"CVE-2021-31406"
],
"database_specific": {
"cwe_ids": [
"CWE-203",
"CWE-208"
],
"github_reviewed": true,
"github_reviewed_at": "2021-04-16T23:15:49Z",
"nvd_published_at": "2021-04-23T16:15:00Z",
"severity": "MODERATE"
},
"details": "Non-constant-time comparison of CSRF tokens in endpoint request handler in `com.vaadin:flow-server` versions 3.0.0 through 5.0.3 (Vaadin 15.0.0 through 18.0.6), and com.vaadin:fusion-endpoint version 6.0.0 (Vaadin 19.0.0) allows attacker to guess a security token for Fusion endpoints via timing attack.\n\n- https://vaadin.com/security/cve-2021-31406",
"id": "GHSA-p7jq-v8jp-j424",
"modified": "2021-04-16T23:15:49Z",
"published": "2021-04-19T14:50:38Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/vaadin/flow/security/advisories/GHSA-p7jq-v8jp-j424"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-31406"
},
{
"type": "WEB",
"url": "https://github.com/vaadin/flow/pull/10157"
},
{
"type": "WEB",
"url": "https://vaadin.com/security/cve-2021-31406"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "Timing side channel vulnerability in endpoint request handler in Vaadin 15-19"
}
GHSA-P7QX-FG8R-MFQ9
Vulnerability from github – Published: 2022-05-24 17:22 – Updated: 2022-05-24 17:22During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean Algorithm which entailed significantly input-dependent flow. This allowed an attacker able to perform electromagnetic-based side channel attacks to record traces leading to the recovery of the secret primes. Note: An unmodified Firefox browser does not generate RSA keys in normal operation and is not affected, but products built on top of it might. This vulnerability affects Firefox < 78.
{
"affected": [],
"aliases": [
"CVE-2020-12402"
],
"database_specific": {
"cwe_ids": [
"CWE-203",
"CWE-327"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-07-09T15:15:00Z",
"severity": "MODERATE"
},
"details": "During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean Algorithm which entailed significantly input-dependent flow. This allowed an attacker able to perform electromagnetic-based side channel attacks to record traces leading to the recovery of the secret primes. *Note:* An unmodified Firefox browser does not generate RSA keys in normal operation and is not affected, but products built on top of it might. This vulnerability affects Firefox \u003c 78.",
"id": "GHSA-p7qx-fg8r-mfq9",
"modified": "2022-05-24T17:22:38Z",
"published": "2022-05-24T17:22:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-12402"
},
{
"type": "WEB",
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1631597"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2020/09/msg00029.html"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RFL6UNFK4MG2WDXLMLFAEIUSM5EUK7CG"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UWVDJRARXNWWWTCGMM63EXLQHH2LNOXO"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202007-10"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/4417-1"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/4417-2"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2020/dsa-4726"
},
{
"type": "WEB",
"url": "https://www.mozilla.org/security/advisories/mfsa2020-24"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00016.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00018.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-P94R-49P8-G22G
Vulnerability from github – Published: 2022-08-13 00:00 – Updated: 2022-08-19 00:00In Framework, there is a possible way to determine whether an app is installed, without query permissions, due to side channel information disclosure. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-13Android ID: A-187042120
{
"affected": [],
"aliases": [
"CVE-2022-20324"
],
"database_specific": {
"cwe_ids": [
"CWE-203"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-08-12T15:15:00Z",
"severity": "MODERATE"
},
"details": "In Framework, there is a possible way to determine whether an app is installed, without query permissions, due to side channel information disclosure. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-13Android ID: A-187042120",
"id": "GHSA-p94r-49p8-g22g",
"modified": "2022-08-19T00:00:22Z",
"published": "2022-08-13T00:00:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-20324"
},
{
"type": "WEB",
"url": "https://source.android.com/security/bulletin/android-13"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
Mitigation MIT-46
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
- 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.