ARM mbed TLS before 2.12.0, before 2.7.5, and before 2.1.14 allows local users to achieve partial plaintext recovery (for a CBC based ciphersuite) via a cache-based side-channel attack.
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Now the only buffer used is the\ninternal MD/SHA one, which is always read fully by the process()\nfunction.\n\nCVE-2018-9988\n\nPrevent arithmetic overflow on bounds check and add bound check\nbefore signature length read in ssl_parse_server_key_exchange().\n\nCVE-2018-9989\n\nPrevent arithmetic overflow on bounds check and add bound check\nbefore length read in ssl_parse_server_psk_hint()\");\n\n script_tag(name:\"vuldetect\", value:\"This check tests the installed software version using the apt package manager.\");\n\n exit(0);\n}\n\ninclude(\"revisions-lib.inc\");\ninclude(\"pkg-lib-deb.inc\");\n\nres = \"\";\nreport = \"\";\nif(!isnull(res = isdpkgvuln(pkg:\"libpolarssl-dev\", ver:\"1.3.9-2.1+deb8u4\", rls:\"DEB8\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"libpolarssl-runtime\", ver:\"1.3.9-2.1+deb8u4\", rls:\"DEB8\"))) {\n report += res;\n}\nif(!isnull(res = isdpkgvuln(pkg:\"libpolarssl7\", ver:\"1.3.9-2.1+deb8u4\", rls:\"DEB8\"))) {\n report += res;\n}\n\nif(report != \"\") {\n security_message(data:report);\n} else if(__pkg_match) {\n exit(99);\n}\n", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "osv": [{"lastseen": "2022-07-21T08:23:44", "description": "\nTwo vulnerabilities were discovered in mbedtls, a lightweight crypto and\nSSL/TLS library which could result in plain text recovery via\nside-channel attacks.\n\n\nFor the stable distribution (stretch), these problems have been fixed in\nversion 2.4.2-1+deb9u3.\n\n\nWe recommend that you upgrade your mbedtls packages.\n\n\nFor the detailed security status of mbedtls please refer to\nits security tracker page at:\n[\\\nhttps://security-tracker.debian.org/tracker/mbedtls](https://security-tracker.debian.org/tracker/mbedtls)\n\n\n", "cvss3": {"exploitabilityScore": 2.2, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "attackComplexity": "HIGH", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 5.9, "privilegesRequired": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "userInteraction": "NONE", "version": "3.0"}, "impactScore": 3.6}, "published": "2018-09-16T00:00:00", "type": "osv", "title": "mbedtls - security update", "bulletinFamily": "software", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2018-0497", "CVE-2018-0498"], "modified": "2022-07-21T05:49:59", "id": "OSV:DSA-4296-1", "href": "https://osv.dev/vulnerability/DSA-4296-1", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:P/I:N/A:N"}}, {"lastseen": "2022-08-05T05:18:18", "description": "\nTwo vulnerabilities were discovered in polarssl, a lightweight crypto and\nSSL/TLS library (nowadays continued under the name mbedtls) which could\nresult in plain text recovery via side-channel attacks.\n\n\nTwo other minor vulnerabilities were discovered in polarssl which could\nresult in arithmetic overflow errors.\n\n\n* [CVE-2018-0497](https://security-tracker.debian.org/tracker/CVE-2018-0497)\nAs a protection against the Lucky Thirteen attack, the TLS code for\n CBC decryption in encrypt-then-MAC mode performs extra MAC\n calculations to compensate for variations in message size due to\n padding. The amount of extra MAC calculation to perform was based on\n the assumption that the bulk of the time is spent in processing\n 64-byte blocks, which is correct for most supported hashes but not for\n SHA-384. Correct the amount of extra work for SHA-384 (and SHA-512\n which is currently not used in TLS, and MD2 although no one should\n care about that).\n\n\nThis is a regression fix for what [CVE-2013-0169](https://security-tracker.debian.org/tracker/CVE-2013-0169) had been fixed this.\n* [CVE-2018-0498](https://security-tracker.debian.org/tracker/CVE-2018-0498)\nThe basis for the Lucky 13 family of attacks is for an attacker to be\n able to distinguish between (long) valid TLS-CBC padding and invalid\n TLS-CBC padding. Since our code sets padlen = 0 for invalid padding,\n the length of the input to the HMAC function gives information about\n that.\n\n\nInformation about this length (modulo the MD/SHA block size) can be\n deduced from how much MD/SHA padding (this is distinct from TLS-CBC\n padding) is used. If MD/SHA padding is read from a (static) buffer, a\n local attacker could get information about how much is used via a\n cache attack targeting that buffer.\n\n\nLet's get rid of this buffer. Now the only buffer used is the\n internal MD/SHA one, which is always read fully by the process()\n function.\n* [CVE-2018-9988](https://security-tracker.debian.org/tracker/CVE-2018-9988)\nPrevent arithmetic overflow on bounds check and add bound check\n before signature length read in ssl\\_parse\\_server\\_key\\_exchange().\n* [CVE-2018-9989](https://security-tracker.debian.org/tracker/CVE-2018-9989)\nPrevent arithmetic overflow on bounds check and add bound check\n before length read in ssl\\_parse\\_server\\_psk\\_hint()\n\n\nFor Debian 8 Jessie, these problems have been fixed in version\n1.3.9-2.1+deb8u4.\n\n\nWe recommend that you upgrade your polarssl 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": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "baseScore": 7.5, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "userInteraction": "NONE", "version": "3.1"}, "impactScore": 3.6}, "published": "2018-09-25T00:00:00", "type": "osv", "title": "polarssl - security update", "bulletinFamily": "software", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": true, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2018-0497", "CVE-2018-9989", "CVE-2013-0169", "CVE-2018-0498", "CVE-2018-9988"], "modified": "2022-08-05T05:18:16", "id": "OSV:DLA-1518-1", "href": "https://osv.dev/vulnerability/DLA-1518-1", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "debian": [{"lastseen": "2023-05-04T15:15:46", "description": "- -------------------------------------------------------------------------\nDebian Security Advisory DSA-4296-1 security@debian.org\nhttps://www.debian.org/security/ Moritz Muehlenhoff\nSeptember 16, 2018 https://www.debian.org/security/faq\n- -------------------------------------------------------------------------\n\nPackage : mbedtls\nCVE ID : CVE-2018-0497 CVE-2018-0498\n\nTwo vulnerabilities were discovered in mbedtls, a lightweight crypto and\nSSL/TLS library which could result in plain text recovery via\nside-channel attacks.\n\nFor the stable distribution (stretch), these problems have been fixed in\nversion 2.4.2-1+deb9u3.\n\nWe recommend that you upgrade your mbedtls packages.\n\nFor the detailed security status of mbedtls please refer to\nits security tracker page at:\nhttps://security-tracker.debian.org/tracker/mbedtls\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": 2.2, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "attackComplexity": "HIGH", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 5.9, "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.0", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2018-09-16T20:58:39", "type": "debian", "title": "[SECURITY] [DSA 4296-1] mbedtls security update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2018-0497", "CVE-2018-0498"], "modified": "2018-09-16T20:58:39", "id": "DEBIAN:DSA-4296-1:E5BF9", "href": "https://lists.debian.org/debian-security-announce/2018/msg00227.html", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:P/I:N/A:N"}}, {"lastseen": "2022-03-26T20:11:39", "description": "Package : polarssl\nVersion : 1.3.9-2.1+deb8u4\nCVE ID : CVE-2013-0169 CVE-2018-0497 CVE-2018-0498 CVE-2018-9988 \n CVE-2018-9989\nDebian Bug : \n\n\nTwo vulnerabilities were discovered in polarssl, a lightweight crypto and\nSSL/TLS library (nowadays continued under the name mbedtls) which could\nresult in plain text recovery via side-channel attacks.\n\nTwo other minor vulnerabilities were discovered in polarssl which could\nresult in arithmetic overflow errors.\n\nCVE-2018-0497\n\n As a protection against the Lucky Thirteen attack, the TLS code for\n CBC decryption in encrypt-then-MAC mode performs extra MAC\n calculations to compensate for variations in message size due to\n padding. The amount of extra MAC calculation to perform was based on\n the assumption that the bulk of the time is spent in processing\n 64-byte blocks, which is correct for most supported hashes but not for\n SHA-384. Correct the amount of extra work for SHA-384 (and SHA-512\n which is currently not used in TLS, and MD2 although no one should\n care about that).\n\n This is a regression fix for what CVE-2013-0169 had been fixed this.\n\nCVE-2018-0498\n\n The basis for the Lucky 13 family of attacks is for an attacker to be\n able to distinguish between (long) valid TLS-CBC padding and invalid\n TLS-CBC padding. Since our code sets padlen = 0 for invalid padding,\n the length of the input to the HMAC function gives information about\n that.\n\n Information about this length (modulo the MD/SHA block size) can be\n deduced from how much MD/SHA padding (this is distinct from TLS-CBC\n padding) is used. If MD/SHA padding is read from a (static) buffer, a\n local attacker could get information about how much is used via a\n cache attack targeting that buffer.\n\n Let's get rid of this buffer. Now the only buffer used is the\n internal MD/SHA one, which is always read fully by the process()\n function.\n\n\nCVE-2018-9988\n\n Prevent arithmetic overflow on bounds check and add bound check\n before signature length read in ssl_parse_server_key_exchange().\n\nCVE-2018-9989\n\n Prevent arithmetic overflow on bounds check and add bound check\n before length read in ssl_parse_server_psk_hint()\n\n\nFor Debian 8 "Jessie", these problems have been fixed in version\n1.3.9-2.1+deb8u4.\n\nWe recommend that you upgrade your polarssl 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\n\n-- \n\nmike gabriel aka sunweaver (Debian Developer)\nfon: +49 (1520) 1976 148\n\nGnuPG Fingerprint: 9BFB AEE8 6C0A A5FF BF22 0782 9AF4 6B30 2577 1B31\nmail: sunweaver@debian.org, http://sunweavers.net\n\nAttachment:\nsignature.asc\nDescription: PGP signature\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2018-09-25T12:26:52", "type": "debian", "title": "[SECURITY] [DLA 1518-1] polarssl security update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": true, "obtainUserPrivilege": false}, "cvelist": ["CVE-2013-0169", "CVE-2018-0497", "CVE-2018-0498", "CVE-2018-9988", "CVE-2018-9989"], "modified": "2018-09-25T12:26:52", "id": "DEBIAN:DLA-1518-1:EF500", "href": "https://lists.debian.org/debian-lts-announce/2018/09/msg00029.html", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}, {"lastseen": "2021-10-22T12:50:05", "description": "Package : polarssl\nVersion : 1.3.9-2.1+deb8u4\nCVE ID : CVE-2013-0169 CVE-2018-0497 CVE-2018-0498 CVE-2018-9988 \n CVE-2018-9989\nDebian Bug : \n\n\nTwo vulnerabilities were discovered in polarssl, a lightweight crypto and\nSSL/TLS library (nowadays continued under the name mbedtls) which could\nresult in plain text recovery via side-channel attacks.\n\nTwo other minor vulnerabilities were discovered in polarssl which could\nresult in arithmetic overflow errors.\n\nCVE-2018-0497\n\n As a protection against the Lucky Thirteen attack, the TLS code for\n CBC decryption in encrypt-then-MAC mode performs extra MAC\n calculations to compensate for variations in message size due to\n padding. The amount of extra MAC calculation to perform was based on\n the assumption that the bulk of the time is spent in processing\n 64-byte blocks, which is correct for most supported hashes but not for\n SHA-384. Correct the amount of extra work for SHA-384 (and SHA-512\n which is currently not used in TLS, and MD2 although no one should\n care about that).\n\n This is a regression fix for what CVE-2013-0169 had been fixed this.\n\nCVE-2018-0498\n\n The basis for the Lucky 13 family of attacks is for an attacker to be\n able to distinguish between (long) valid TLS-CBC padding and invalid\n TLS-CBC padding. Since our code sets padlen = 0 for invalid padding,\n the length of the input to the HMAC function gives information about\n that.\n\n Information about this length (modulo the MD/SHA block size) can be\n deduced from how much MD/SHA padding (this is distinct from TLS-CBC\n padding) is used. If MD/SHA padding is read from a (static) buffer, a\n local attacker could get information about how much is used via a\n cache attack targeting that buffer.\n\n Let's get rid of this buffer. Now the only buffer used is the\n internal MD/SHA one, which is always read fully by the process()\n function.\n\n\nCVE-2018-9988\n\n Prevent arithmetic overflow on bounds check and add bound check\n before signature length read in ssl_parse_server_key_exchange().\n\nCVE-2018-9989\n\n Prevent arithmetic overflow on bounds check and add bound check\n before length read in ssl_parse_server_psk_hint()\n\n\nFor Debian 8 "Jessie", these problems have been fixed in version\n1.3.9-2.1+deb8u4.\n\nWe recommend that you upgrade your polarssl 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\n\n-- \n\nmike gabriel aka sunweaver (Debian Developer)\nfon: +49 (1520) 1976 148\n\nGnuPG Fingerprint: 9BFB AEE8 6C0A A5FF BF22 0782 9AF4 6B30 2577 1B31\nmail: sunweaver@debian.org, http://sunweavers.net\n\nAttachment:\nsignature.asc\nDescription: PGP signature\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "baseScore": 7.5, "privilegesRequired": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "userInteraction": "NONE", "version": "3.0"}, "impactScore": 3.6}, "published": "2018-09-25T12:26:52", "type": "debian", "title": "[SECURITY] [DLA 1518-1] polarssl security update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": true, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2013-0169", "CVE-2018-0497", "CVE-2018-0498", "CVE-2018-9988", "CVE-2018-9989"], "modified": "2018-09-25T12:26:52", "id": "DEBIAN:DLA-1518-1:A6705", "href": "https://lists.debian.org/debian-lts-announce/2018/09/msg00029.html", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "nessus": [{"lastseen": "2023-05-20T14:40:04", "description": "Simon Butcher reports :\n\n- When using a CBC based ciphersuite, a remote attacker can partially recover the plaintext.\n\n- When using a CBC based ciphersuite, an attacker with the ability to execute arbitrary code on the machine under attack can partially recover the plaintext by use of cache based side-channels.", "cvss3": {}, "published": "2018-08-13T00:00:00", "type": "nessus", "title": "FreeBSD : mbed TLS -- plaintext recovery vulnerabilities (f4876dd4-9ca8-11e8-aa17-0011d823eebd)", "bulletinFamily": "scanner", "cvss2": {}, "cvelist": ["CVE-2018-0497", "CVE-2018-0498"], "modified": "2018-11-10T00:00:00", "cpe": ["p-cpe:/a:freebsd:freebsd:mbedtls", "cpe:/o:freebsd:freebsd"], "id": "FREEBSD_PKG_F4876DD49CA811E8AA170011D823EEBD.NASL", "href": "https://www.tenable.com/plugins/nessus/111659", "sourceData": "#\n# (C) Tenable Network Security, Inc.\n#\n# The descriptive text and package checks in this plugin were \n# extracted from the FreeBSD VuXML database :\n#\n# Copyright 2003-2018 Jacques Vidrine and contributors\n#\n# Redistribution and use in source (VuXML) and 'compiled' forms (SGML,\n# HTML, PDF, PostScript, RTF and so forth) with or without modification,\n# are permitted provided that the following conditions are met:\n# 1. 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CVE-2018-0498
