CVE-2018-1121

{"containers": {"cna": {"affected": [{"product": "procps-ng, procps", "vendor": "[UNKNOWN]", "versions": [{"status": "affected", "version": "up to procps-ng 3.3.15 and newer"}]}], "datePublic": "2018-05-17T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "procps-ng, procps is vulnerable to a process hiding through race condition. Since the kernel's proc_pid_readdir() returns PID entries in ascending numeric order, a process occupying a high PID can use inotify events to determine when the process list is being scanned, and fork/exec to obtain a lower PID, thus avoiding enumeration. An unprivileged attacker can hide a process from procps-ng's utilities by exploiting a race condition in reading /proc/PID entries. This vulnerability affects procps and procps-ng up to version 3.3.15, newer versions might be affected also."}], "metrics": [{"cvssV3_0": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 3.9, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L", "version": "3.0"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-367", "description": "CWE-367", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2020-06-30T15:26:18.000Z", "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat"}, "references": [{"name": "44806", "tags": ["exploit", "x_refsource_EXPLOIT-DB"], "url": "https://www.exploit-db.com/exploits/44806/"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1121"}, {"name": "104214", "tags": ["vdb-entry", "x_refsource_BID"], "url": "http://www.securityfocus.com/bid/104214"}, {"name": "[oss-security] 20180517 Qualys Security Advisory - Procps-ng Audit Report", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "http://seclists.org/oss-sec/2018/q2/122"}, {"tags": ["x_refsource_MISC"], "url": "https://www.qualys.com/2018/05/17/procps-ng-audit-report-advisory.txt"}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T03:51:48.742Z"}, "title": "CVE Program Container", "references": [{"name": "44806", "tags": ["exploit", "x_refsource_EXPLOIT-DB", "x_transferred"], "url": "https://www.exploit-db.com/exploits/44806/"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1121"}, {"name": "104214", "tags": ["vdb-entry", "x_refsource_BID", "x_transferred"], "url": "http://www.securityfocus.com/bid/104214"}, {"name": "[oss-security] 20180517 Qualys Security Advisory - Procps-ng Audit Report", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "http://seclists.org/oss-sec/2018/q2/122"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.qualys.com/2018/05/17/procps-ng-audit-report-advisory.txt"}]}]}, "cveMetadata": {"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "assignerShortName": "redhat", "cveId": "CVE-2018-1121", "datePublished": "2018-06-13T20:00:00.000Z", "dateReserved": "2017-12-04T00:00:00.000Z", "dateUpdated": "2024-08-05T03:51:48.742Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{}

{"affected": [{"affectedData": [{"product": "procps-ng, procps", "vendor": "[UNKNOWN]", "versions": [{"status": "affected", "version": "up to procps-ng 3.3.15 and newer"}]}], "source": "secalert@redhat.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:procps_project:procps:*:*:*:*:*:*:*:*", "matchCriteriaId": "C3460032-733F-4974-BD6B-786F8295C373", "versionEndIncluding": "3.3.15", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "procps-ng, procps is vulnerable to a process hiding through race condition. Since the kernel's proc_pid_readdir() returns PID entries in ascending numeric order, a process occupying a high PID can use inotify events to determine when the process list is being scanned, and fork/exec to obtain a lower PID, thus avoiding enumeration. An unprivileged attacker can hide a process from procps-ng's utilities by exploiting a race condition in reading /proc/PID entries. This vulnerability affects procps and procps-ng up to version 3.3.15, newer versions might be affected also."}, {"lang": "es", "value": "procps-ng, procps son vulnerables a una ocultaci\u00f3n de procesos mediante una condici\u00f3n de carrera. Debido a que el proc_pid_readdir() del kernel devuelve las entradas PID en orden num\u00e9rico ascendente, un proceso que ocupe un PID alto puede emplear eventos inotify para determinar cu\u00e1ndo se est\u00e1 escaneando la lista de procesos y hacer un fork/exec para obtener un PID menor, evitando as\u00ed la enumeraci\u00f3n. Un atacante sin privilegios puede ocultar un proceso de las utilidades procps-ng mediante la explotaci\u00f3n de una condici\u00f3n de carrera en la lectura de entradas /proc/PID. Esta vulnerabilidad afecta a procps y procps-ng hasta la versi\u00f3n 3.3.15; versiones posteriores tambi\u00e9n podr\u00edan haberse visto afectadas."}], "id": "CVE-2018-1121", "lastModified": "2026-06-17T01:50:31.440", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 4.3, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 3.9, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L", "version": "3.0"}, "exploitabilityScore": 1.3, "impactScore": 2.5, "source": "secalert@redhat.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.0"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2018-06-13T20:29:00.337", "references": [{"source": "secalert@redhat.com", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "http://seclists.org/oss-sec/2018/q2/122"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/104214"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1121"}, {"source": "secalert@redhat.com", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "url": "https://www.exploit-db.com/exploits/44806/"}, {"source": "secalert@redhat.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://www.qualys.com/2018/05/17/procps-ng-audit-report-advisory.txt"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "http://seclists.org/oss-sec/2018/q2/122"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/104214"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1121"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "url": "https://www.exploit-db.com/exploits/44806/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://www.qualys.com/2018/05/17/procps-ng-audit-report-advisory.txt"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-367"}], "source": "secalert@redhat.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-362"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank Qualys Research Labs for reporting this issue.", "bugzilla": {"description": "procps: process hiding through race condition enumerating /proc", "id": "1575473", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1575473"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.9", "cvss3_scoring_vector": "CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L", "status": "draft"}, "cwe": "CWE-367", "details": ["procps-ng, procps is vulnerable to a process hiding through race condition. Since the kernel's proc_pid_readdir() returns PID entries in ascending numeric order, a process occupying a high PID can use inotify events to determine when the process list is being scanned, and fork/exec to obtain a lower PID, thus avoiding enumeration. An unprivileged attacker can hide a process from procps-ng's utilities by exploiting a race condition in reading /proc/PID entries. This vulnerability affects procps and procps-ng up to version 3.3.15, newer versions might be affected also.", "Since the kernel's proc_pid_readdir() returns PID entries in ascending numeric order, a process occupying a high PID can use inotify events to determine when the process list is being scanned, and fork/exec to obtain a lower PID, thus avoiding enumeration. An unprivileged attacker can hide a process from procps-ng's utilities by exploiting a race condition in reading /proc/PID entries."], "name": "CVE-2018-1121", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "procps", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Will not fix", "package_name": "procps", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Will not fix", "package_name": "procps-ng", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "procps-ng", "product_name": "Red Hat Enterprise Linux 8"}], "public_date": "2018-05-17T17:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2018-1121\nhttps://nvd.nist.gov/vuln/detail/CVE-2018-1121\nhttps://www.qualys.com/2018/05/17/procps-ng-audit-report-advisory.txt"], "statement": "The /proc filesystem is not a reliable mechanism to account for processes running on a system, as it is unable to offer snapshot semantics. Short-lived processes have always been able to escape detection by tools that monitor /proc. This CVE simply identifies a reliable way to do so using inotify.\nProcess accounting for security purposes, or with a requirement to record very short-running processes and those attempting to evade detection, should be performed with more robust methods such as auditd(8) (the Linux Audit Daemon) or systemtap.\nBecause an attacker can achieve similar results whether this vulnerability is present or not, Red Hat assesses its impact as Low.", "threat_severity": "Low"}

{}