CWE-754
Allowed-with-ReviewImproper Check for Unusual or Exceptional Conditions
Abstraction: Class · Status: Incomplete
The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.
905 vulnerabilities reference this CWE, most recent first.
GHSA-Q6QG-6FMG-JJCV
Vulnerability from github – Published: 2026-04-21 15:32 – Updated: 2026-04-22 00:31Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.
{
"affected": [],
"aliases": [
"CVE-2026-6766"
],
"database_specific": {
"cwe_ids": [
"CWE-754"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-04-21T13:16:22Z",
"severity": "HIGH"
},
"details": "Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.",
"id": "GHSA-q6qg-6fmg-jjcv",
"modified": "2026-04-22T00:31:38Z",
"published": "2026-04-21T15:32:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6766"
},
{
"type": "WEB",
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2023207"
},
{
"type": "WEB",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-30"
},
{
"type": "WEB",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-32"
},
{
"type": "WEB",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-33"
},
{
"type": "WEB",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-34"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-Q75J-P4R8-37X7
Vulnerability from github – Published: 2024-07-30 09:32 – Updated: 2025-11-04 00:31In the Linux kernel, the following vulnerability has been resolved:
tcp_metrics: validate source addr length
I don't see anything checking that TCP_METRICS_ATTR_SADDR_IPV4 is at least 4 bytes long, and the policy doesn't have an entry for this attribute at all (neither does it for IPv6 but v6 is manually validated).
{
"affected": [],
"aliases": [
"CVE-2024-42154"
],
"database_specific": {
"cwe_ids": [
"CWE-754"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-07-30T08:15:06Z",
"severity": "CRITICAL"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp_metrics: validate source addr length\n\nI don\u0027t see anything checking that TCP_METRICS_ATTR_SADDR_IPV4\nis at least 4 bytes long, and the policy doesn\u0027t have an entry\nfor this attribute at all (neither does it for IPv6 but v6 is\nmanually validated).",
"id": "GHSA-q75j-p4r8-37x7",
"modified": "2025-11-04T00:31:08Z",
"published": "2024-07-30T09:32:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-42154"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/19d997b59fa1fd7a02e770ee0881c0652b9c32c9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2a2e79dbe2236a1289412d2044994f7ab419b44c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/31f03bb04146c1c6df6c03e9f45401f5f5a985d3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3d550dd5418729a6e77fe7721d27adea7152e321"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/66be40e622e177316ae81717aa30057ba9e61dff"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8c2debdd170e395934ac0e039748576dfde14e99"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cdffc358717e436bb67122bb82c1a2a26e050f98"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ef7c428b425beeb52b894e16f1c4b629d6cebfb6"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20240828-0010"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/09/24/3"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/09/24/4"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/09/25/3"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-Q8F8-8VF2-W978
Vulnerability from github – Published: 2025-08-12 12:30 – Updated: 2025-08-12 12:30A vulnerability has been identified in SIPROTEC 4 6MD61 (All versions), SIPROTEC 4 6MD63 (All versions), SIPROTEC 4 6MD66 (All versions), SIPROTEC 4 6MD665 (All versions), SIPROTEC 4 7SA522 (All versions), SIPROTEC 4 7SA6 (All versions < V4.78), SIPROTEC 4 7SD5 (All versions < V4.78), SIPROTEC 4 7SD610 (All versions < V4.78), SIPROTEC 4 7SJ61 (All versions), SIPROTEC 4 7SJ62 (All versions), SIPROTEC 4 7SJ63 (All versions), SIPROTEC 4 7SJ64 (All versions), SIPROTEC 4 7SJ66 (All versions), SIPROTEC 4 7SS52 (All versions), SIPROTEC 4 7ST6 (All versions), SIPROTEC 4 7UM61 (All versions), SIPROTEC 4 7UM62 (All versions), SIPROTEC 4 7UT612 (All versions), SIPROTEC 4 7UT613 (All versions), SIPROTEC 4 7UT63 (All versions), SIPROTEC 4 7VE6 (All versions), SIPROTEC 4 7VK61 (All versions), SIPROTEC 4 7VU683 (All versions), SIPROTEC 4 Compact 7RW80 (All versions), SIPROTEC 4 Compact 7SD80 (All versions), SIPROTEC 4 Compact 7SJ80 (All versions), SIPROTEC 4 Compact 7SJ81 (All versions), SIPROTEC 4 Compact 7SK80 (All versions), SIPROTEC 4 Compact 7SK81 (All versions). Affected devices do not properly handle interrupted operations of file transfer. This could allow an unauthenticated remote attacker to cause a denial of service condition. To restore normal operations, the devices need to be restarted.
{
"affected": [],
"aliases": [
"CVE-2024-52504"
],
"database_specific": {
"cwe_ids": [
"CWE-754"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-08-12T12:15:33Z",
"severity": "HIGH"
},
"details": "A vulnerability has been identified in SIPROTEC 4 6MD61 (All versions), SIPROTEC 4 6MD63 (All versions), SIPROTEC 4 6MD66 (All versions), SIPROTEC 4 6MD665 (All versions), SIPROTEC 4 7SA522 (All versions), SIPROTEC 4 7SA6 (All versions \u003c V4.78), SIPROTEC 4 7SD5 (All versions \u003c V4.78), SIPROTEC 4 7SD610 (All versions \u003c V4.78), SIPROTEC 4 7SJ61 (All versions), SIPROTEC 4 7SJ62 (All versions), SIPROTEC 4 7SJ63 (All versions), SIPROTEC 4 7SJ64 (All versions), SIPROTEC 4 7SJ66 (All versions), SIPROTEC 4 7SS52 (All versions), SIPROTEC 4 7ST6 (All versions), SIPROTEC 4 7UM61 (All versions), SIPROTEC 4 7UM62 (All versions), SIPROTEC 4 7UT612 (All versions), SIPROTEC 4 7UT613 (All versions), SIPROTEC 4 7UT63 (All versions), SIPROTEC 4 7VE6 (All versions), SIPROTEC 4 7VK61 (All versions), SIPROTEC 4 7VU683 (All versions), SIPROTEC 4 Compact 7RW80 (All versions), SIPROTEC 4 Compact 7SD80 (All versions), SIPROTEC 4 Compact 7SJ80 (All versions), SIPROTEC 4 Compact 7SJ81 (All versions), SIPROTEC 4 Compact 7SK80 (All versions), SIPROTEC 4 Compact 7SK81 (All versions). Affected devices do not properly handle interrupted operations of file transfer. This could allow an unauthenticated remote attacker to cause a denial of service condition. To restore normal operations, the devices need to be restarted.",
"id": "GHSA-q8f8-8vf2-w978",
"modified": "2025-08-12T12:30:33Z",
"published": "2025-08-12T12:30:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-52504"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-400089.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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-Q8Q4-MCH4-5VVH
Vulnerability from github – Published: 2022-08-17 00:00 – Updated: 2022-08-18 00:00OTFCC v0.10.4 was discovered to contain a segmentation violation via /release-x64/otfccdump+0x4fe9a7.
{
"affected": [],
"aliases": [
"CVE-2022-35473"
],
"database_specific": {
"cwe_ids": [
"CWE-754"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-08-16T21:15:00Z",
"severity": "MODERATE"
},
"details": "OTFCC v0.10.4 was discovered to contain a segmentation violation via /release-x64/otfccdump+0x4fe9a7.",
"id": "GHSA-q8q4-mch4-5vvh",
"modified": "2022-08-18T00:00:20Z",
"published": "2022-08-17T00:00:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-35473"
},
{
"type": "WEB",
"url": "https://cvjark.github.io/2022/07/06/CVE-2022-33047"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-Q8RX-W8H7-J8XW
Vulnerability from github – Published: 2024-02-21 21:30 – Updated: 2024-09-27 18:32Malformed S2 Nonce Get Command Class packets can be sent to crash PC Controller v5.54.0 and earlier.
{
"affected": [],
"aliases": [
"CVE-2023-6640"
],
"database_specific": {
"cwe_ids": [
"CWE-248",
"CWE-754"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-02-21T20:15:46Z",
"severity": "MODERATE"
},
"details": "Malformed S2 Nonce Get Command Class packets can be sent to crash PC Controller v5.54.0 and earlier.\u00a0",
"id": "GHSA-q8rx-w8h7-j8xw",
"modified": "2024-09-27T18:32:20Z",
"published": "2024-02-21T21:30:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-6640"
},
{
"type": "WEB",
"url": "https://community.silabs.com/068Vm000001HdNm"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-QCC4-3RXF-GF4M
Vulnerability from github – Published: 2021-08-30 16:16 – Updated: 2021-09-03 20:35Improper check in CheckboxGroup in com.vaadin:vaadin-checkbox-flow versions 1.2.0 prior to 2.0.0 (Vaadin 12.0.0 prior to 14.0.0), 2.0.0 prior to 3.0.0 (Vaadin 14.0.0 prior to 14.5.0), 3.0.0 through 4.0.1 (Vaadin 15.0.0 through 17.0.11), 14.5.0 through 14.6.7 (Vaadin 14.5.0 through 14.6.7), and 18.0.0 through 20.0.5 (Vaadin 18.0.0 through 20.0.5) allows attackers to modify the value of a disabled Checkbox inside enabled CheckboxGroup component via unspecified vectors.
- https://vaadin.com/security/cve-2021-33605
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "com.vaadin:vaadin-checkbox-flow"
},
"ranges": [
{
"events": [
{
"introduced": "12.0.0"
},
{
"fixed": "14.6.8"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.vaadin:vaadin-checkbox-flow"
},
"ranges": [
{
"events": [
{
"introduced": "15.0.0"
},
{
"fixed": "20.0.6"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2021-33605"
],
"database_specific": {
"cwe_ids": [
"CWE-754"
],
"github_reviewed": true,
"github_reviewed_at": "2021-08-25T16:15:42Z",
"nvd_published_at": "2021-08-25T13:15:00Z",
"severity": "MODERATE"
},
"details": "Improper check in `CheckboxGroup` in `com.vaadin:vaadin-checkbox-flow` versions 1.2.0 prior to 2.0.0 (Vaadin 12.0.0 prior to 14.0.0), 2.0.0 prior to 3.0.0 (Vaadin 14.0.0 prior to 14.5.0), 3.0.0 through 4.0.1 (Vaadin 15.0.0 through 17.0.11), 14.5.0 through 14.6.7 (Vaadin 14.5.0 through 14.6.7), and 18.0.0 through 20.0.5 (Vaadin 18.0.0 through 20.0.5) allows attackers to modify the value of a disabled `Checkbox` inside enabled `CheckboxGroup` component via unspecified vectors.\n\n- https://vaadin.com/security/cve-2021-33605",
"id": "GHSA-qcc4-3rxf-gf4m",
"modified": "2021-09-03T20:35:31Z",
"published": "2021-08-30T16:16:38Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/vaadin/flow-components/security/advisories/GHSA-qcc4-3rxf-gf4m"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-33605"
},
{
"type": "WEB",
"url": "https://github.com/vaadin/flow-components/pull/1903"
},
{
"type": "WEB",
"url": "https://github.com/vaadin/flow-components/commit/1aa6bc94c763023bc3fc5849c2a1e8cab3bf6766"
},
{
"type": "WEB",
"url": "https://github.com/vaadin/flow-components/commit/f136532a735f703f1144f19fee48c9009c659f03"
},
{
"type": "PACKAGE",
"url": "https://github.com/vaadin/flow-components"
},
{
"type": "WEB",
"url": "https://vaadin.com/security/cve-2021-33605"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "Unauthorized property update in CheckboxGroup component in Vaadin 12-14 and 15-20"
}
GHSA-QCX2-GX3R-6M57
Vulnerability from github – Published: 2022-05-24 19:03 – Updated: 2022-05-24 19:03Improper Check for Unusual or Exceptional Conditions vulnerability exists in Triconex Model 3009 MP installed on Tricon V11.3.x systems that could cause module reset when TCM receives malformed TriStation packets while the write-protect keyswitch is in the program position. This CVE ID is unique from CVE-2021-22742, CVE-2021-22744, CVE-2021-22746, and CVE-2021-22747.
{
"affected": [],
"aliases": [
"CVE-2021-22745"
],
"database_specific": {
"cwe_ids": [
"CWE-754"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-05-26T20:15:00Z",
"severity": "LOW"
},
"details": "Improper Check for Unusual or Exceptional Conditions vulnerability exists in Triconex Model 3009 MP installed on Tricon V11.3.x systems that could cause module reset when TCM receives malformed TriStation packets while the write-protect keyswitch is in the program position. This CVE ID is unique from CVE-2021-22742, CVE-2021-22744, CVE-2021-22746, and CVE-2021-22747.",
"id": "GHSA-qcx2-gx3r-6m57",
"modified": "2022-05-24T19:03:16Z",
"published": "2022-05-24T19:03:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-22745"
},
{
"type": "WEB",
"url": "https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-130-03"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-QGC7-3QHR-FR4G
Vulnerability from github – Published: 2024-05-06 03:30 – Updated: 2025-03-17 18:31In DA, there is a possible permission bypass due to an incorrect status check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS08355514; Issue ID: ALPS08355514.
{
"affected": [],
"aliases": [
"CVE-2023-32871"
],
"database_specific": {
"cwe_ids": [
"CWE-391",
"CWE-754"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-06T03:15:09Z",
"severity": "MODERATE"
},
"details": "In DA, there is a possible permission bypass due to an incorrect status check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS08355514; Issue ID: ALPS08355514.",
"id": "GHSA-qgc7-3qhr-fr4g",
"modified": "2025-03-17T18:31:43Z",
"published": "2024-05-06T03:30:47Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-32871"
},
{
"type": "WEB",
"url": "https://corp.mediatek.com/product-security-bulletin/May-2024"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-QH53-XJ96-333X
Vulnerability from github – Published: 2025-08-10 06:30 – Updated: 2025-08-10 06:30In EMQX before 5.8.6, administrators can install arbitrary novel plugins via the Dashboard web interface. NOTE: the Supplier's position is that this is the intended behavior; however, 5.8.6 adds a defense-in-depth feature in which a plugin's acceptability (for later Dashboard installation) is set by the "emqx ctl plugins allow" CLI command.
{
"affected": [],
"aliases": [
"CVE-2025-52136"
],
"database_specific": {
"cwe_ids": [
"CWE-754"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-08-10T04:15:33Z",
"severity": "LOW"
},
"details": "In EMQX before 5.8.6, administrators can install arbitrary novel plugins via the Dashboard web interface. NOTE: the Supplier\u0027s position is that this is the intended behavior; however, 5.8.6 adds a defense-in-depth feature in which a plugin\u0027s acceptability (for later Dashboard installation) is set by the \"emqx ctl plugins allow\" CLI command.",
"id": "GHSA-qh53-xj96-333x",
"modified": "2025-08-10T06:30:27Z",
"published": "2025-08-10T06:30:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-52136"
},
{
"type": "WEB",
"url": "https://docs.emqx.com/en/emqx/latest/dashboard/introduction.html"
},
{
"type": "WEB",
"url": "https://docs.emqx.com/en/emqx/latest/deploy/install-docker.html"
},
{
"type": "WEB",
"url": "https://github.com/ricardojoserf/emqx-RCE"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-QH97-826G-4V22
Vulnerability from github – Published: 2025-10-14 18:30 – Updated: 2025-10-14 18:30An improper check or handling of exceptional conditions vulnerability [CWE-703] in FortiOS version 7.4.0 through 7.4.3 and before 7.2.7, FortiProxy version 7.4.0 through 7.4.3 and before 7.2.9, FortiPAM before 1.2.0 and FortiSwitchManager version 7.2.0 through 7.2.3 and version 7.0.0 through 7.0.3 fgfm daemon may allow an unauthenticated attacker to repeatedly reset the fgfm connection via crafted SSL encrypted TCP requests.
{
"affected": [],
"aliases": [
"CVE-2024-26008"
],
"database_specific": {
"cwe_ids": [
"CWE-754"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-14T16:15:34Z",
"severity": "MODERATE"
},
"details": "An improper check or handling of exceptional conditions vulnerability [CWE-703] in FortiOS version 7.4.0 through 7.4.3 and before 7.2.7, FortiProxy version 7.4.0 through 7.4.3 and before 7.2.9, FortiPAM before 1.2.0 and FortiSwitchManager version 7.2.0 through 7.2.3 and version 7.0.0 through 7.0.3 fgfm daemon may allow an unauthenticated attacker to repeatedly reset the fgfm connection via crafted SSL encrypted TCP requests.",
"id": "GHSA-qh97-826g-4v22",
"modified": "2025-10-14T18:30:27Z",
"published": "2025-10-14T18:30:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26008"
},
{
"type": "WEB",
"url": "https://fortiguard.fortinet.com/psirt/FG-IR-24-041"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
}
]
}
Mitigation MIT-3
Strategy: Language Selection
- Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- Choose languages with features such as exception handling that force the programmer to anticipate unusual conditions that may generate exceptions. Custom exceptions may need to be developed to handle unusual business-logic conditions. Be careful not to pass sensitive exceptions back to the user (CWE-209, CWE-248).
Mitigation
Check the results of all functions that return a value and verify that the value is expected.
Mitigation
If using exception handling, catch and throw specific exceptions instead of overly-general exceptions (CWE-396, CWE-397). Catch and handle exceptions as locally as possible so that exceptions do not propagate too far up the call stack (CWE-705). Avoid unchecked or uncaught exceptions where feasible (CWE-248).
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.
- Exposing additional information to a potential attacker in the context of an exceptional condition can help the attacker determine what attack vectors are most likely to succeed beyond DoS.
Mitigation MIT-5
Strategy: Input Validation
- Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
- When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
- Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
Mitigation MIT-38
If the program must fail, ensure that it fails gracefully (fails closed). There may be a temptation to simply let the program fail poorly in cases such as low memory conditions, but an attacker may be able to assert control before the software has fully exited. Alternately, an uncontrolled failure could cause cascading problems with other downstream components; for example, the program could send a signal to a downstream process so the process immediately knows that a problem has occurred and has a better chance of recovery.
Mitigation
Use system limits, which should help to prevent resource exhaustion. However, the product should still handle low resource conditions since they may still occur.
No CAPEC attack patterns related to this CWE.