CVE-2013-4421

mediumpriority · track · 22EPSS 0.064 · 94 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

6.42% (94th) EPSS

CVSS 5 · medium

Is it mine?

2 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-28

The buf_decompress function in packet.c in Dropbear SSH Server before 2013.59 allows remote attackers to cause a denial of service (memory consumption) via a compressed packet that has a large size when it is decompressed.

cvss

Technical severity, 0–10. One row per scoring source.

5.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v2.04.3mediumAV:N/AC:L/Au:N/C:N/I:N/A:P/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-189USprimary

affected products (2)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
dropbear ssh project dropbear ssh< 2013.59nvdUScpe:2.3:a:dropbear_ssh_project:dropbear_ssh:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2013-10-25modified 2026-06-16

related (1,342)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2016-1010US	high8.8OT critical	19.3% (97th)	KEV	2016-03-12
Integer overflow in Adobe Flash Player before 18.0.0.333 and 19.x through 21.x before 21.0.0.182 on Windows and OS X and before 11.2.202.577 on Linux, Adobe AIR before 21.0.0.176,…
CVE-2015-8651US	high8.8OT critical	67.7% (99th)	KEV	2015-12-28
Integer overflow in Adobe Flash Player before 18.0.0.324 and 19.x and 20.x before 20.0.0.267 on Windows and OS X and before 11.2.202.559 on Linux, Adobe AIR before 20.0.0.233, Adob…
CVE-2013-2094US	high7.2OT critical	47.7% (99th)	KEV	2013-05-14
The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows local users to gain privileges via a craft…
CVE-2012-5054US	high8.8OT critical	21.2% (98th)	KEV	2012-09-24
Integer overflow in the copyRawDataTo method in the Matrix3D class in Adobe Flash Player before 11.4.402.265 allows remote attackers to execute arbitrary code via malformed argumen…
CVE-2015-1538US	high10.0	99.1% (100th)	Exploit	2015-10-01
Integer overflow in the SampleTable::setSampleToChunkParams function in SampleTable.cpp in libstagefright in Android before 5.1.1 LMY48I allows remote attackers to execute arbitrar…

+1337 more

references (27)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan