`CVE-2013-2566`

Affected software	2 products, listed below
Severity	5.9 Medium CVSS 3.1 3 scores
Weakness	CWE-326
Published	15 Mar 2013
Updated	16 Jun 2026

Description

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.

CWE-327

Exploitation status

Forecast only (84% 30-day chance)

No exploit has been reported in the sources we check. EPSS puts this CVE in the top 0.29% of all scored CVEs. That is a model's forecast, not a report of exploitation.

CISA KEV not listed
VulnCheck KEV not listed
CISA Vulnrichment exploitation: none
Indexed PoC none indexed
EPSS 84% chance in 30 days A model's forecast, not a report of exploitation. Higher than 99.7% of all scored CVEs.

Waratek protection

Outside Waratek scope

A Java vulnerability, but not one Waratek protects. It affects only Java on a user's desktop (applets, Web Start, JavaFX, the installer), sits in a product the Waratek agent can't be installed into, or is in a package we don't expect in business applications. The decision below says which.

Protection none
Action not pursued none
Review human Researcher
Record active

Decided by	Manual classification of this CVE in the legacy dataset
Finding	A manual classification set this CVE's status to Outside Waratek scope, but the CVE names a tracked product.

Decided by

Manual classification of this CVE in the legacy dataset

Finding

A manual classification set this CVE's status to Outside Waratek scope, but the CVE names a tracked product.

CVSS

5.9 MEDIUM v3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N 3 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

Version Score Band Vector Assigner Type

CVSS 3.1 5.9 MEDIUM CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N CISA-ADP Secondary published

CVSS 3.0 5.9 MEDIUM CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N NVD Primary

CVSS 2.0 4.3 none AV:N/AC:M/Au:N/C:P/I:N/A:N NVD Primary

Version	Score	Band	Vector	Assigner	Type
CVSS 3.1	5.9	MEDIUM	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N`	CISA-ADP	Secondary	published
CVSS 3.0	5.9	MEDIUM	`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N`	NVD	Primary
CVSS 2.0	4.3	none	`AV:N/AC:M/Au:N/C:P/I:N/A:N`	NVD	Primary

Affected software and releases

Oracle advisories

Advisory	Type	Quarter	Products Oracle names in its risk matrix
Oracle Critical Patch Update January 2018 ↗	CPU	2018-Q1	Oracle Communications Applications / Security (3.x)
Oracle Critical Patch Update April 2017 ↗	CPU	2017-Q2	Oracle Communications Applications / Sysadmin (SCZ7.3.0, SCZ7.4.0)
Oracle Critical Patch Update October 2016 ↗	CPU	2016-Q4	Oracle Communications Applications / Security (Ecz7.3m1p4 and earlier)
Oracle Critical Patch Update July 2016 ↗	CPU	2016-Q3	Oracle Sun Systems Products Suite / XCP Firmware (XCP prior to XCP2280)
Oracle Critical Patch Update April 2016 ↗	CPU	2016-Q2	Oracle Sun Systems Products Suite / XCP Firmware (XCP prior to XCP 1121)

Advisory

Type

Quarter

Products Oracle names in its risk matrix

Oracle Critical Patch Update January 2018 ↗

CPU

2018-Q1

Oracle Communications Applications / Security (3.x)

Oracle Critical Patch Update April 2017 ↗

CPU

2017-Q2

Oracle Communications Applications / Sysadmin (SCZ7.3.0, SCZ7.4.0)

Oracle Critical Patch Update October 2016 ↗

CPU

2016-Q4

Oracle Communications Applications / Security (Ecz7.3m1p4 and earlier)

Oracle Critical Patch Update July 2016 ↗

CPU

2016-Q3

Oracle Sun Systems Products Suite / XCP Firmware (XCP prior to XCP2280)

Oracle Critical Patch Update April 2016 ↗

CPU

2016-Q2

Oracle Sun Systems Products Suite / XCP Firmware (XCP prior to XCP 1121)

Oracle components and versions

Family	Component	Versions, as Oracle lists them	Read as
Oracle Communications Applications	Security	Ecz7.3m1p4 and earlier	3
Oracle Communications Applications	Sysadmin	SCZ7.3.0, SCZ7.4.0
Oracle Sun Systems Products Suite	XCP Firmware	XCP prior to XCP2280	1121

Family

Component

Versions, as Oracle lists them

Read as

Oracle Communications Applications

Security

Ecz7.3m1p4 and earlier

Oracle Communications Applications

Sysadmin

SCZ7.3.0, SCZ7.4.0

Oracle Sun Systems Products Suite

XCP Firmware

XCP prior to XCP2280

1121

Products and versions

16 products, 26 version entries

Source	Vendor	Product	Scheme	Affected versions
nvd	canonical	ubuntu linux	generic	12.04 · 12.10 · 13.04 · 13.10
nvd	fujitsu	m10-1 firmware	generic	＜ 2280
nvd	fujitsu	m10-4 firmware	generic	＜ 2280
nvd	fujitsu	m10-4s firmware	generic	＜ 2280
nvd	fujitsu	sparc enterprise m3000 firmware	generic	＜ 1121
nvd	fujitsu	sparc enterprise m4000 firmware	generic	＜ 1121
nvd	fujitsu	sparc enterprise m5000 firmware	generic	＜ 1121
nvd	fujitsu	sparc enterprise m8000 firmware	generic	＜ 1121
nvd	fujitsu	sparc enterprise m9000 firmware	generic	＜ 1121
nvd	mozilla	firefox	generic	＜ 17.0.11 · ≥ 24.1.0 and ＜ 24.1.1 · ＜ 25.0.1
nvd	mozilla	seamonkey	generic	＜ 2.22.1
nvd	mozilla	thunderbird	generic	＜ 24.1.1
nvd	mozilla	thunderbird esr	generic	＜ 17.0.11
nvd	oracle	communications application session controller	generic	≥ 3.0.0 and ≤ 3.9.1
nvd	oracle	http server	generic	11.1.1.7.0 · 11.1.1.9.0 · 12.1.3.0.0 · 12.2.1.1.0 · 12.2.1.2.0
nvd	oracle	integrated lights out manager firmware	generic	≥ 3.0.0 and ≤ 3.2.11 · ≥ 4.0.0 and ≤ 4.0.4

Source

Vendor

Product

Scheme

Affected versions

nvd

canonical

ubuntu linux

generic

12.04 · 12.10 · 13.04 · 13.10

nvd

fujitsu

m10-1 firmware

generic

＜ 2280

nvd

fujitsu

m10-4 firmware

generic

＜ 2280

nvd

fujitsu

m10-4s firmware

generic

＜ 2280

nvd

fujitsu

sparc enterprise m3000 firmware

generic

＜ 1121

nvd

fujitsu

sparc enterprise m4000 firmware

generic

＜ 1121

nvd

fujitsu

sparc enterprise m5000 firmware

generic

＜ 1121

nvd

fujitsu

sparc enterprise m8000 firmware

generic

＜ 1121

nvd

fujitsu

sparc enterprise m9000 firmware

generic

＜ 1121

nvd

mozilla

firefox

generic

＜ 17.0.11 · ≥ 24.1.0 and ＜ 24.1.1 · ＜ 25.0.1

nvd

mozilla

seamonkey

generic

＜ 2.22.1

nvd

mozilla

thunderbird

generic

＜ 24.1.1

nvd

mozilla

thunderbird esr

generic

＜ 17.0.11

nvd

oracle

communications application session controller

generic

≥ 3.0.0 and ≤ 3.9.1

nvd

oracle

http server

generic

11.1.1.7.0 · 11.1.1.9.0 · 12.1.3.0.0 · 12.2.1.1.0 · 12.2.1.2.0

nvd

oracle

integrated lights out manager firmware

generic

≥ 3.0.0 and ≤ 3.2.11 · ≥ 4.0.0 and ≤ 4.0.4

Earlier manual review

A reviewer classified this CVE in an older dataset. We kept the labels and products below, but not the reviewer's reasoning.

## Manual Classification Context **Labels:** SYSADMIN, HTTPS, TLS, SSH, SSL/TLS, NO AUTH REMOTE EXPLOIT, SECURITY, XCP FIRMWARE **Products:** M10-4, SSL/TLS, ORACLE ENTERPRISE SESSION BORDER CONTROLLER, FUJITSU M10-1, M10-4S SERVERS, ORACLE SUN SYSTEMS PRODUCTS SUITE, M5000, M8000, ORACLE COMMUNICATIONS SESSION BORDER CONTROLLER, M4000, M9000 SERVERS, ORACLE COMMUNICATIONS APPLICATIONS, ORACLE COMMUNICATIONS APPLICATION SESSION CONTROLLER, SPARC ENTERPRISE M3000

References

URL	Tags
http://blog.cryptographyengineering.com/2013/03/attack-of-week-rc4-is-kind-of-broken-in.html	Third Party Advisory
http://cr.yp.to/talks/2013.03.12/slides.pdf	Third Party Advisory
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705	Third Party Advisory
http://marc.info/?l=bugtraq&m=143039468003789&w=2	Issue Tracking, Third Party Advisory
http://my.opera.com/securitygroup/blog/2013/03/20/on-the-precariousness-of-rc4	Third Party Advisory
http://security.gentoo.org/glsa/glsa-201406-19.xml	Third Party Advisory
http://www.isg.rhul.ac.uk/tls/	Third Party Advisory
http://www.mozilla.org/security/announce/2013/mfsa2013-103.html	Third Party Advisory
http://www.opera.com/docs/changelogs/unified/1215/	Third Party Advisory
http://www.opera.com/security/advisory/1046	Third Party Advisory

URL

Timeline

Published	2013-03-15	By the CVE Program.
NVD record modified	2026-06-16	NVD's own last-modified date for this record.

Published

2013-03-15

By the CVE Program.

NVD record modified

2026-06-16

NVD's own last-modified date for this record.

How VRT decided (5 of 24 rules ran)

5 of 24 rules ran. The rest didn't run because an earlier rule had already settled the CVE.

# Rule Outcome Status Detail

identity: Does this identifier describe a vulnerability at all? the first rule that matches decides

1 rejected no match CVE Program withdrawal of this identifier

scope: Is it a vulnerability Waratek protects? the first rule that matches decides

2 armr-patch-file no match An ARMR patch file on disk for this CVE

3 armr-secure-rule-file no match An ARMR security-rule template on disk for this CVE

4 manual-classification no match A researcher's recorded decision for this specific CVE

5 manual classification decided it matched Outside Waratek scope Found in legacy manual classifications

6 non-java-upstream not reached A root cause in non-Java code: an OS kernel, a C library, or a bundled runtime

7 oracle-component not reached The defect being in a component of a tracked product the agent does not reach: JavaFX, the Java SE installer, the JInitiator browser plug-in, the native WebLogic proxy plug-in, or a native part of Oracle Application Server or Collaboration Suite (HTTP Server, Web Cache, Internet Directory, mail and calendar servers). Oracle gives these no CPE of their own and names them only in the description.

8 java-client-side not reached Oracle's own risk-matrix note saying the CVE is reached only through untrusted code in the Java sandbox (applets, Web Start) or only through a client installation of Java, so a server running its own trusted code is not exposed

9 osv-maven not reached An OSV.dev record of this CVE affecting a package published to Maven Central. When every such package is one business applications do not use (Minecraft mods and launchers, Fastjson) and no tracked product is named by CPE, it settles the CVE as Outside Waratek scope instead

10 cna-maven-package not reached An affected Maven artifact named by the CNA itself

11 known-cpe-product not reached An NVD CPE naming a product ARMR tracks

12 cna-cpe-product not reached A CPE the CNA published naming a tracked product. Oracle publishes these on advisory day, months before NVD.

13 oracle-advisory-family not reached A tracked product family named in Oracle's own risk matrix. CPE cannot carry a suite name, only a module.

14 cna-named-product not reached A tracked product named in words by the CVE's own CNA, on a record with no CPE yet. Apache and Eclipse publish these on advisory day, before NVD adds CPE data.

15 non-deployable-product not reached The only affected product being a sealed appliance image, where Java runs but no -javaagent can be attached

16 unmatched-product not reached No tracked product matched above, and none present at all

disposition: What do we do about one that is? every rule runs

17 patch-hint not reached A reference pointing at the upstream fix: a commit, a PR, a Red Hat bug

18 open-source-maven not reached The affected package being open source on Maven, so the fix can be read

19 poc-derivable not reached An indexed exploit clearing the evidence bar to reverse-engineer, where there is no source to read

20 no-exploit not reached Nothing to build a rule from yet: no published exploit, no CISA record of exploitation and no source-level change to read

21 secure-rule-match not reached A vulnerability class already blocked by an ARMR security rule

22 exploited-no-fix-or-poc not reached Somebody exploiting this CVE (a CISA or VulnCheck KEV listing, or a CISA verdict of active exploitation), with no fix, source code or PoC to build a rule from

23 below-action-threshold not reached Medium or Low severity, no CISA or VulnCheck KEV listing, no PoC clearing the evidence bar, no CISA verdict, no Oracle advisory

24 no-exploit-published not reached Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all

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