---
cve: "CVE-2017-7526"
severity: "MEDIUM"
cvss: 6.1
epss: "3.9%"
vendor: "GnuPG"
kev: false
exploited: false
published: "2018-07-26 13:29:00"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-16T12:47:34+02:00"
---

# CVE-2017-7526

> 6.1 MEDIUM

## Beschreibung

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-Vektor

```
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Erforderlich | good |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Keine | good |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- b16176769672a659b9a7c1d23325270338323385 (Commit)
- b16176769672a659b9a7c1d23325270338323385 (Commit)

## Referenzen

- <https://usn.ubuntu.com/3733-1/>
- <https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7526>
- <http://www.securitytracker.com/id/1038915>
- <https://www.debian.org/security/2017/dsa-3960>
- <https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=78130828e9a140a9de4dafadbc844dbb64cb709a>
- <https://www.debian.org/security/2017/dsa-3901>
- <https://usn.ubuntu.com/3733-2/>
- <https://eprint.iacr.org/2017/627>
- <http://www.securityfocus.com/bid/99338>
- <https://lists.gnupg.org/pipermail/gnupg-announce/2017q2/000408.html>
- <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=8725c99ffa41778f382ca97233183bcd687bb0ce>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2017-7526) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_