freexl is susceptible to denial of service(DoS). The attack can launched by sending a malicious file to `destroy_cell()` function, leading to heap-based buffer over-read.
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There is a heap-based buffer over-read in the freexl::destroy_cell function.", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 8.8, "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.0", "userInteraction": "REQUIRED"}, "impactScore": 5.9}, "published": "2018-02-23T21:29:00", "type": "cve", "title": "CVE-2018-7435", "cwe": ["CWE-125"], "bulletinFamily": "NVD", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 6.8, "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2018-7435"], "modified": "2020-07-27T03:15:00", "cpe": ["cpe:/o:debian:debian_linux:7.0", "cpe:/o:debian:debian_linux:9.0", "cpe:/o:debian:debian_linux:8.0"], "id": "CVE-2018-7435", "href": "https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7435", "cvss": {"score": 6.8, "vector": "AV:N/AC:M/Au:N/C:P/I:P/A:P"}, "cpe23": ["cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*"]}], "redhatcve": [{"lastseen": "2022-07-07T11:10:58", "description": "An issue was discovered in FreeXL before 1.0.5. 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There is a heap-based\nbuffer over-read in the freexl::destroy_cell function.", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 8.8, "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.0", "userInteraction": "REQUIRED"}, "impactScore": 5.9}, "published": "2018-02-23T00:00:00", "type": "ubuntucve", "title": "CVE-2018-7435", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 6.8, "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2018-7435"], "modified": "2018-02-23T00:00:00", "id": "UB:CVE-2018-7435", "href": "https://ubuntu.com/security/CVE-2018-7435", "cvss": {"score": 6.8, "vector": "AV:N/AC:M/Au:N/C:P/I:P/A:P"}}], "debian": [{"lastseen": "2021-12-18T03:55:08", "description": "Package : freexl\nVersion : 1.0.0b-1+deb7u5\nCVE ID : CVE-2018-7435 CVE-2018-7436 CVE-2018-7437 CVE-2018-7438\n CVE-2018-7439\n\n\nLeon reported five heap-based buffer-overflow vulnerabilities in FreeXL.\n\nCVE-2018-7435\n\n There is a heap-based buffer over-read in the freexl::destroy_cell\n function.\n\nCVE-2018-7436\n\n There is a heap-based buffer over-read in a pointer dereference of\n the parse_SST function.\n\nCVE-2018-7437\n\n There is a heap-based buffer over-read in a memcpy call of the\n parse_SST function.\n\nCVE-2018-7438\n\n There is a heap-based buffer over-read in the parse_unicode_string\n function.\n\nCVE-2018-7439\n\n There is a heap-based buffer over-read in the function\n read_mini_biff_next_record.\n\nFor Debian 7 "Wheezy", these problems have been fixed in version\n1.0.0b-1+deb7u5.\n\nWe recommend that you upgrade your freexl packages.\n\nFurther information about Debian LTS security advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: https://wiki.debian.org/LTS", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 8.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "userInteraction": "REQUIRED", "version": "3.0"}, "impactScore": 5.9}, "published": "2018-03-01T17:52:05", "type": "debian", "title": "[SECURITY] [DLA 1297-1] freexl security update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 6.8, "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 6.4, "obtainUserPrivilege": false}, "cvelist": ["CVE-2018-7435", "CVE-2018-7436", "CVE-2018-7437", "CVE-2018-7438", "CVE-2018-7439"], "modified": "2018-03-01T17:52:05", "id": "DEBIAN:DLA-1297-1:19AFC", "href": "https://lists.debian.org/debian-lts-announce/2018/03/msg00000.html", "cvss": {"score": 6.8, "vector": "AV:N/AC:M/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2021-10-22T13:01:31", "description": "Package : freexl\nVersion : 1.0.0b-1+deb7u5\nCVE ID : CVE-2018-7435 CVE-2018-7436 CVE-2018-7437 CVE-2018-7438\n CVE-2018-7439\n\n\nLeon reported five heap-based buffer-overflow vulnerabilities in FreeXL.\n\nCVE-2018-7435\n\n There is a heap-based buffer over-read in the freexl::destroy_cell\n function.\n\nCVE-2018-7436\n\n There is a heap-based buffer over-read in a pointer dereference of\n the parse_SST function.\n\nCVE-2018-7437\n\n There is a heap-based buffer over-read in a memcpy call of the\n parse_SST function.\n\nCVE-2018-7438\n\n There is a heap-based buffer over-read in the parse_unicode_string\n function.\n\nCVE-2018-7439\n\n There is a heap-based buffer over-read in the function\n read_mini_biff_next_record.\n\nFor Debian 7 "Wheezy", these problems have been fixed in version\n1.0.0b-1+deb7u5.\n\nWe recommend that you upgrade your freexl packages.\n\nFurther information about Debian LTS security advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: https://wiki.debian.org/LTS", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 8.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "userInteraction": "REQUIRED", "version": "3.0"}, "impactScore": 5.9}, "published": "2018-03-01T17:52:05", "type": "debian", "title": "[SECURITY] [DLA 1297-1] freexl security update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 6.8, "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 6.4, "obtainUserPrivilege": false}, "cvelist": ["CVE-2018-7435", "CVE-2018-7436", "CVE-2018-7437", "CVE-2018-7438", "CVE-2018-7439"], "modified": "2018-03-01T17:52:05", "id": "DEBIAN:DLA-1297-1:27DB6", "href": "https://lists.debian.org/debian-lts-announce/2018/03/msg00000.html", "cvss": {"score": 6.8, "vector": "AV:N/AC:M/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-05-02T15:49:15", "description": "- -------------------------------------------------------------------------\nDebian Security Advisory DSA-4129-1 security@debian.org\nhttps://www.debian.org/security/ Moritz Muehlenhoff\nMarch 02, 2018 https://www.debian.org/security/faq\n- -------------------------------------------------------------------------\n\nPackage : freexl\nCVE ID : CVE-2018-7435 CVE-2018-7436 CVE-2018-7437 CVE-2018-7438 \n CVE-2018-7439\n\nMultiple heap buffer over reads were discovered in freexl, a library to\nread Microsoft Excel spreadsheets, which could result in denial of\nservice.\n\nFor the oldstable distribution (jessie), these problems have been fixed\nin version 1.0.0g-1+deb8u5.\n\nFor the stable distribution (stretch), these problems have been fixed in\nversion 1.0.2-2+deb9u2.\n\nWe recommend that you upgrade your freexl packages.\n\nFor the detailed security status of freexl please refer to\nits security tracker page at:\nhttps://security-tracker.debian.org/tracker/freexl\n\nFurther information about Debian Security Advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: https://www.debian.org/security/\n\nMailing list: debian-security-announce@lists.debian.org", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 8.8, "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.0", "userInteraction": "REQUIRED"}, "impactScore": 5.9}, "published": "2018-03-02T20:42:04", "type": "debian", "title": "[SECURITY] [DSA 4129-1] freexl security update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 6.8, "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2018-7435", "CVE-2018-7436", "CVE-2018-7437", "CVE-2018-7438", "CVE-2018-7439"], "modified": "2018-03-02T20:42:04", "id": "DEBIAN:DSA-4129-1:AC543", "href": "https://lists.debian.org/debian-security-announce/2018/msg00054.html", "cvss": {"score": 6.8, "vector": "AV:N/AC:M/Au:N/C:P/I:P/A:P"}}], "osv": [{"lastseen": "2022-08-05T05:18:10", "description": "\nLeon reported five heap-based buffer-overflow vulnerabilities in FreeXL.\n\n\n* [CVE-2018-7435](https://security-tracker.debian.org/tracker/CVE-2018-7435)\nThere is a heap-based buffer over-read in the freexl::destroy\\_cell\n function.\n* [CVE-2018-7436](https://security-tracker.debian.org/tracker/CVE-2018-7436)\nThere is a heap-based buffer over-read in a pointer dereference of\n the parse\\_SST function.\n* [CVE-2018-7437](https://security-tracker.debian.org/tracker/CVE-2018-7437)\nThere is a heap-based buffer over-read in a memcpy call of the\n parse\\_SST function.\n* [CVE-2018-7438](https://security-tracker.debian.org/tracker/CVE-2018-7438)\nThere is a heap-based buffer over-read in the parse\\_unicode\\_string\n function.\n* [CVE-2018-7439](https://security-tracker.debian.org/tracker/CVE-2018-7439)\nThere is a heap-based buffer over-read in the function\n read\\_mini\\_biff\\_next\\_record.\n\n\nFor Debian 7 Wheezy, these problems have been fixed in version\n1.0.0b-1+deb7u5.\n\n\nWe recommend that you upgrade your freexl packages.\n\n\nFurther information about Debian LTS security advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: <https://wiki.debian.org/LTS>\n\n\n", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 8.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "userInteraction": "REQUIRED", "version": "3.0"}, "impactScore": 5.9}, "published": "2018-03-01T00:00:00", "type": "osv", "title": "freexl - security update", "bulletinFamily": "software", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, 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Denial Of Service (DoS)
