CVE-2017-7526

libgcrypt before version 1.7.8 is vulnerable to a cache side-channel attack resulting into a complete break of RSA-1024 while using the left-to-right method for computing the sliding-window expansion. The same attack is believed to work on RSA-2048 with moderately more computation. This side-channel requires that attacker can run arbitrary software on the hardware where the private RSA key is used.

CVSS v3 6.1 MEDIUM
CVSS v2.0 4.3 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

V3 Legend

Vector : AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N

Exploitability : 1.6 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

4.3^/10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:N/AC:M/Au:N/C:P/I:N/A:N

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
http://www.securityfocus.com/bid/99338	Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1038915	Third Party Advisory VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7526	Issue Tracking Patch Third Party Advisory
https://eprint.iacr.org/2017/627	Third Party Advisory
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=78130828e9a140a9de4dafadbc844dbb64cb709a
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=8725c99ffa41778f382ca97233183bcd687bb0ce
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=e6a3dc9900433bbc8ad362a595a3837318c28fa9
https://lists.gnupg.org/pipermail/gnupg-announce/2017q2/000408.html	Mailing List Vendor Advisory
https://usn.ubuntu.com/3733-1/	Third Party Advisory
https://usn.ubuntu.com/3733-2/	Third Party Advisory
https://www.debian.org/security/2017/dsa-3901	Third Party Advisory
https://www.debian.org/security/2017/dsa-3960	Third Party Advisory
http://www.securityfocus.com/bid/99338	Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1038915	Third Party Advisory VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7526	Issue Tracking Patch Third Party Advisory
https://eprint.iacr.org/2017/627	Third Party Advisory
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=78130828e9a140a9de4dafadbc844dbb64cb709a
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=8725c99ffa41778f382ca97233183bcd687bb0ce
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=e6a3dc9900433bbc8ad362a595a3837318c28fa9
https://lists.gnupg.org/pipermail/gnupg-announce/2017q2/000408.html	Mailing List Vendor Advisory
https://usn.ubuntu.com/3733-1/	Third Party Advisory
https://usn.ubuntu.com/3733-2/	Third Party Advisory
https://www.debian.org/security/2017/dsa-3901	Third Party Advisory
https://www.debian.org/security/2017/dsa-3960	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:canonical:ubuntu_linux:12.04::::esm:::
	cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::

Configuration 3 (hide)

OR	cpe:2.3:o:debian:debian_linux:8.0:::::::*
	cpe:2.3:o:debian:debian_linux:9.0:::::::*

History

21 Nov 2024, 03:32

Type	Values Removed	Values Added
CVSS	v2 : ~~4.3~~ v3 : ~~6.8~~	v2 : 4.3 v3 : 6.1
References	~~() http://www.securityfocus.com/bid/99338 - Third Party Advisory, VDB Entry~~	() http://www.securityfocus.com/bid/99338 - Third Party Advisory, VDB Entry
References	~~() http://www.securitytracker.com/id/1038915 - Third Party Advisory, VDB Entry~~	() http://www.securitytracker.com/id/1038915 - Third Party Advisory, VDB Entry
References	~~() https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7526 - Issue Tracking, Patch, Third Party Advisory~~	() https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7526 - Issue Tracking, Patch, Third Party Advisory
References	~~() https://eprint.iacr.org/2017/627 - Third Party Advisory~~	() https://eprint.iacr.org/2017/627 - Third Party Advisory
References	~~() https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=78130828e9a140a9de4dafadbc844dbb64cb709a -~~	() https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=78130828e9a140a9de4dafadbc844dbb64cb709a -
References	~~() https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=8725c99ffa41778f382ca97233183bcd687bb0ce -~~	() https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=8725c99ffa41778f382ca97233183bcd687bb0ce -
References	~~() https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=e6a3dc9900433bbc8ad362a595a3837318c28fa9 -~~	() https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=e6a3dc9900433bbc8ad362a595a3837318c28fa9 -
References	~~() https://lists.gnupg.org/pipermail/gnupg-announce/2017q2/000408.html - Mailing List, Vendor Advisory~~	() https://lists.gnupg.org/pipermail/gnupg-announce/2017q2/000408.html - Mailing List, Vendor Advisory
References	~~() https://usn.ubuntu.com/3733-1/ - Third Party Advisory~~	() https://usn.ubuntu.com/3733-1/ - Third Party Advisory
References	~~() https://usn.ubuntu.com/3733-2/ - Third Party Advisory~~	() https://usn.ubuntu.com/3733-2/ - Third Party Advisory
References	~~() https://www.debian.org/security/2017/dsa-3901 - Third Party Advisory~~	() https://www.debian.org/security/2017/dsa-3901 - Third Party Advisory
References	~~() https://www.debian.org/security/2017/dsa-3960 - Third Party Advisory~~	() https://www.debian.org/security/2017/dsa-3960 - Third Party Advisory

Information

Published : 2018-07-26 13:29

Updated : 2024-11-21 03:32

NVD link : CVE-2017-7526

Mitre link : CVE-2017-7526

CVE.ORG link : CVE-2017-7526

JSON object : View

Products Affected

gnupg

libgcrypt

debian

debian_linux

canonical

ubuntu_linux

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

CWE-310

Cryptographic Issues

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"confidentialityImpact": "HIGH"}, "impactScore": 4.0, "exploitabilityScore": 1.6}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.0", "baseScore": 6.8, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 4.0, "exploitabilityScore": 2.2}]}, "published": "2018-07-26T13:29:00.183", "references": [{"url": "http://www.securityfocus.com/bid/99338", "tags": ["Third Party Advisory", "VDB Entry"], "source": "secalert@redhat.com"}, {"url": "http://www.securitytracker.com/id/1038915", "tags": ["Third Party Advisory", "VDB Entry"], "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7526", "tags": ["Issue Tracking", "Patch", "Third Party Advisory"], 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{"url": "https://www.debian.org/security/2017/dsa-3901", "tags": ["Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://www.debian.org/security/2017/dsa-3960", "tags": ["Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "http://www.securityfocus.com/bid/99338", "tags": ["Third Party Advisory", "VDB Entry"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "http://www.securitytracker.com/id/1038915", "tags": ["Third Party Advisory", "VDB Entry"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7526", "tags": ["Issue Tracking", "Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://eprint.iacr.org/2017/627", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=78130828e9a140a9de4dafadbc844dbb64cb709a", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=8725c99ffa41778f382ca97233183bcd687bb0ce", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=e6a3dc9900433bbc8ad362a595a3837318c28fa9", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.gnupg.org/pipermail/gnupg-announce/2017q2/000408.html", "tags": ["Mailing List", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://usn.ubuntu.com/3733-1/", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://usn.ubuntu.com/3733-2/", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.debian.org/security/2017/dsa-3901", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.debian.org/security/2017/dsa-3960", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-200"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-310"}]}], "descriptions": [{"lang": "en", "value": "libgcrypt before version 1.7.8 is vulnerable to a cache side-channel attack resulting into a complete break of RSA-1024 while using the left-to-right method for computing the sliding-window expansion. The same attack is believed to work on RSA-2048 with moderately more computation. This side-channel requires that attacker can run arbitrary software on the hardware where the private RSA key is used."}, {"lang": "es", "value": "libgcrypt en versiones anteriores a la 1.7.8 es vulnerable a un ataque de canal lateral de memoria cach\u00e9, resultando en una brecha completa de RSA-1024 cuando se utiliza un m\u00e9todo left-to-right para procesar la expansi\u00f3n de la ventana deslizante. Se cree que el mismo ataque funciona en RSA-2048 con un nivel de procesamiento moderadamente mayor. Este canal lateral necesita que el atacante pueda ejecutar software arbitrario en el hardware en donde se utiliza la clave privada RSA."}], "lastModified": "2024-11-21T03:32:05.007", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3D6643E3-48B2-425D-84A4-4CEDB17A8C22", "versionEndExcluding": "1.7.8"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*", "vulnerable": true, "matchCriteriaId": "8D305F7A-D159-4716-AB26-5E38BB5CD991"}, {"criteria": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*", "vulnerable": true, "matchCriteriaId": "B5A6F2F3-4894-4392-8296-3B8DD2679084"}, {"criteria": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*", "vulnerable": true, "matchCriteriaId": "F7016A2A-8365-4F1A-89A2-7A19F2BCAE5B"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43"}, {"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252"}], "operator": "OR"}]}], "sourceIdentifier": "secalert@redhat.com"}

6.1 /10

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

4.3 /10

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

JSON object

Attach tags to CVE-2017-7526

6.1^/10

4.3^/10

Attach tags to `CVE-2017-7526`