---
cve: "CVE-2013-2566"
severity: "MEDIUM"
cvss: 5.9
epss: "84.4%"
vendor: "n/a"
kev: false
exploited: false
published: "2013-03-15 21:55:01"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-10-26T18:28:48+01:00"
---

# CVE-2013-2566

> 5.9 MEDIUM

## Beschreibung

The RC4 algorithm, as used in the TLS protocol and SSL protocol, has many single-byte biases, which makes it easier for remote attackers to conduct plaintext-recovery attacks via statistical analysis of ciphertext in a large number of sessions that use the same plaintext.

## CNA-Record (Kanon, cvelistV5)

- CNA: **mitre**
- State: PUBLISHED
- Stand: 2026-05-22 10:41:19

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
```

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

## Schwachstellen-Klasse

- **CWE-327** — Use of a Broken or Risky Cryptographic Algorithm
  The product uses a broken or risky cryptographic algorithm or protocol.

## Angriffsmuster (CAPEC)

- [CAPEC-20 — Encryption Brute Forcing](https://capec.mitre.org/data/definitions/20.html) _(Severity: Low)_
- [CAPEC-97 — Cryptanalysis](https://capec.mitre.org/data/definitions/97.html) _(Severity: Very High)_
- [CAPEC-459 — Creating a Rogue Certification Authority Certificate](https://capec.mitre.org/data/definitions/459.html) _(Severity: Very High)_
- [CAPEC-473 — Signature Spoof](https://capec.mitre.org/data/definitions/473.html)
- [CAPEC-475 — Signature Spoofing by Improper Validation](https://capec.mitre.org/data/definitions/475.html) _(Severity: High)_
- [CAPEC-608 — Cryptanalysis of Cellular Encryption](https://capec.mitre.org/data/definitions/608.html) _(Severity: High)_
- [CAPEC-614 — Rooting SIM Cards](https://capec.mitre.org/data/definitions/614.html) _(Severity: High)_

## ATT&CK-Techniken

- [T1036.001 — Masquerading: Invalid Code Signature](https://attack.mitre.org/techniques/T1036/001/)
- [T1553.002 — Subvert Trust Controls: Code Signing](https://attack.mitre.org/techniques/T1553/002/)

## Referenzen

- <http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html>
- <http://blog.cryptographyengineering.com/2013/03/attack-of-week-rc4-is-kind-of-broken-in.html>
- <http://www.securityfocus.com/bid/58796>
- <http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html>
- <http://cr.yp.to/talks/2013.03.12/slides.pdf>
- <http://marc.info/?l=bugtraq&m=143039468003789&w=2>
- <http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html>
- <https://security.gentoo.org/glsa/201504-01>
- <http://security.gentoo.org/glsa/glsa-201406-19.xml>
- <http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html>
- <http://www.ubuntu.com/usn/USN-2031-1>
- <http://www.ubuntu.com/usn/USN-2032-1>
- <http://my.opera.com/securitygroup/blog/2013/03/20/on-the-precariousness-of-rc4>
- <http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html>
- <http://www.opera.com/security/advisory/1046>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2013-2566/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_