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Vulnerability details: VCID-7hrs-wfbd-bbcf
Vulnerability ID VCID-7hrs-wfbd-bbcf
Aliases CVE-2017-7526
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-310 Cryptographic Issues
System Score Found at
cvssv3 6.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2017-7526.json
epss 0.01969 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
epss 0.02023 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
epss 0.02023 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
epss 0.02283 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
epss 0.02283 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
epss 0.02283 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
epss 0.02283 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
epss 0.02283 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
epss 0.02283 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
epss 0.02283 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
epss 0.02283 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
epss 0.02283 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
epss 0.02283 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
epss 0.02283 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
epss 0.02283 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
epss 0.02283 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
epss 0.02283 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
epss 0.02283 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
epss 0.02283 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
epss 0.02345 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
epss 0.02345 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
epss 0.02345 https://api.first.org/data/v1/epss?cve=CVE-2017-7526
cvssv2 1.2 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3 2.9 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2017-7526
cvssv3 6.8 https://nvd.nist.gov/vuln/detail/CVE-2017-7526
archlinux High https://security.archlinux.org/AVG-338
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2017-7526.json
https://api.first.org/data/v1/epss?cve=CVE-2017-7526
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7526
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7526
https://eprint.iacr.org/2017/627
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
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
https://www.debian.org/security/2017/dsa-3901
https://www.debian.org/security/2017/dsa-3960
http://www.securityfocus.com/bid/99338
http://www.securitytracker.com/id/1038915
1466265 https://bugzilla.redhat.com/show_bug.cgi?id=1466265
ASA-201707-1 https://security.archlinux.org/ASA-201707-1
AVG-338 https://security.archlinux.org/AVG-338
cpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
CVE-2017-7526 https://nvd.nist.gov/vuln/detail/CVE-2017-7526
USN-3347-1 https://usn.ubuntu.com/3347-1/
USN-3347-2 https://usn.ubuntu.com/3347-2/
USN-3733-1 https://usn.ubuntu.com/3733-1/
USN-3733-2 https://usn.ubuntu.com/3733-2/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2017-7526.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:L/AC:H/Au:N/C:P/I:N/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2017-7526
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2017-7526
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.82857
EPSS Score 0.01969
Published At Sept. 16, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:31:47.890594+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.12/main.json 37.0.0