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We are concerned that there may be attempts to abuse the vulnerability in the future."}, {"lang": "es", "value": "Se ha descubierto una vulnerabilidad de denegaci\u00f3n de servicio (DoS) en Apache SpamAssassin en versiones anteriores a la 3.4.2. La vulnerabilidad ocurre con ciertas etiquetas no cerradas en correos electr\u00f3nicos que provocan que las marcas se manejen incorrectamente, lo que conduce al agotamiento del tiempo de escaneo. En Apache SpamAssassin, empleando HTML::Parser, se establece un objeto y se engancha a los manejadores de etiqueta de inicio y final. En ambos casos, el evento \"open\" est\u00e1 inmediatamente seguido por un evento \"close\"; incluso si la etiqueta *no* se cierra en el HTML que se est\u00e1 analizando. Debido a esto, falta que el evento \"text\" gestione el objeto de forma normal. Esto puede provocar que los correos electr\u00f3nicos cuidadosamente manipulados tarden m\u00e1s tiempo en escanearse del planeado, lo que conduce a una denegaci\u00f3n de servicio (DoS). El problema es posiblemente un error o decisi\u00f3n en HTML::Parser que impacta en la forma en la que Apache SpamAssassin emplea el m\u00f3dulo con HTML mal formado. El exploit se ha visto \"in the wild\", pero no se cree que haya sido parte a prop\u00f3sito de un intento de denegaci\u00f3n de servicio (DoS). Se cree que podr\u00edan haber intentos de abusar de la vulnerabilidad en el futuro."}], "id": "CVE-2017-15705", "lastModified": "2024-11-21T03:15:02.343", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.0"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2018-09-17T14:29:00.293", "references": [{"source": "security@apache.org", "url": "http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00002.html"}, {"source": "security@apache.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/105347"}, {"source": "security@apache.org", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2018:2916"}, {"source": "security@apache.org", "url": "https://lists.apache.org/thread.html/7f6a16bc0fd0fd5e67c7fd95bd655069a2ac7d1f88e42d3c853e601c%40%3Cannounce.apache.org%3E"}, {"source": "security@apache.org", "tags": ["Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2018/11/msg00016.html"}, {"source": "security@apache.org", "url": "https://security.gentoo.org/glsa/201812-07"}, {"source": "security@apache.org", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/3811-1/"}, {"source": "security@apache.org", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/3811-2/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00002.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/105347"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2018:2916"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.apache.org/thread.html/7f6a16bc0fd0fd5e67c7fd95bd655069a2ac7d1f88e42d3c853e601c%40%3Cannounce.apache.org%3E"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2018/11/msg00016.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.gentoo.org/glsa/201812-07"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/3811-1/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/3811-2/"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2018:2916", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "spamassassin-0:3.4.0-4.el7_5", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2018-10-11T00:00:00Z"}], "bugzilla": {"description": "spamassassin: Certain unclosed tags in crafted emails allow for scan timeouts and result in denial of service", "id": "1629521", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1629521"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-400", "details": ["A denial of service vulnerability was identified that exists in Apache SpamAssassin before 3.4.2. The vulnerability arises with certain unclosed tags in emails that cause markup to be handled incorrectly leading to scan timeouts. In Apache SpamAssassin, using HTML::Parser, we setup an object and hook into the begin and end tag event handlers In both cases, the \"open\" event is immediately followed by a \"close\" event - even if the tag *does not* close in the HTML being parsed. Because of this, we are missing the \"text\" event to deal with the object normally. This can cause carefully crafted emails that might take more scan time than expected leading to a Denial of Service. The issue is possibly a bug or design decision in HTML::Parser that specifically impacts the way Apache SpamAssassin uses the module with poorly formed html. The exploit has been seen in the wild but not believed to have been purposefully part of a Denial of Service attempt. We are concerned that there may be attempts to abuse the vulnerability in the future.", "A flaw was found in the way SpamAssassin processes HTML email containing unclosed HTML tags. A carefully crafted mail message could cause SpamAssassin to consume significant resources. If a large number of these messages are sent, a denial of service could occur potentially delaying or preventing the delivery of email."], "name": "CVE-2017-15705", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "spamassassin", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Will not fix", "package_name": "spamassassin", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "spamassassin", "product_name": "Red Hat Enterprise Linux 8"}], "public_date": "2018-09-17T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2017-15705\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-15705\nhttps://mail-archives.apache.org/mod_mbox/spamassassin-announce/201809.mbox/raw/%3Cc57c0f41-742c-3c3e-249c-ae2614bf0d7d%40apache.org%3E/"], "threat_severity": "Important", "upstream_fix": "spamassassin 3.4.2"}