Vulnerability Name:

CVE-2013-4421 (CCN-87848)

Assigned:2013-10-10
Published:2013-10-10
Updated:2018-10-30
Summary: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 v3 Severity:7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
3.7 Low (Temporal CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
5.8 Medium (CCN Temporal CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-189
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2013-4421

Source: FEDORA
Type: Third Party Advisory
FEDORA-2013-18606

Source: FEDORA
Type: Third Party Advisory
FEDORA-2013-18593

Source: SUSE
Type: Third Party Advisory
openSUSE-SU-2013:1616

Source: SUSE
Type: Third Party Advisory
openSUSE-SU-2013:1696

Source: CCN
Type: oss-sec Mailing List, Thu, 10 Oct 2013 21:38:19 +0800
Re: CVE Request: dropbear sshd daemon 2013.59 release

Source: CCN
Type: SA55173
Dropbear SSH Server User Enumeration Weakness and Denial of Service Vulnerability

Source: SECUNIA
Type: Third Party Advisory
55173

Source: MLIST
Type: Mailing List, Third Party Advisory
[oss-security] 20131010 Re: CVE Request: dropbear sshd daemon 2013.59 release

Source: BID
Type: Third Party Advisory, VDB Entry
62958

Source: CCN
Type: BID-62958
Dropbear SSH 'buf_decompress()' Function Denial of Service Vulnerability

Source: XF
Type: UNKNOWN
dropbear-cve20134421-dos(87848)

Source: CCN
Type: Dropbear Web page
2013.59

Source: CONFIRM
Type: Vendor Advisory
https://matt.ucc.asn.au/dropbear/CHANGES

Source: CONFIRM
Type: Patch, Third Party Advisory
https://secure.ucc.asn.au/hg/dropbear/rev/0bf76f54de6f

Source: CONFIRM
Type: Third Party Advisory
https://support.citrix.com/article/CTX216642

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2013-4421

Vulnerable Configuration:Configuration 1:
  • cpe:/a:dropbear_ssh_project:dropbear_ssh:*:*:*:*:*:*:*:* (Version < 2013.59)

    • Configuration CCN 1:
  • cpe:/a:dropbear_ssh_project:dropbear_ssh:2011.54:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:20134421
    V
    		CVE-2013-4421
    2017-03-01
    oval:com.ubuntu.cosmic:def:201344210000000
    V
    		CVE-2013-4421 on Ubuntu 18.10 (cosmic) - medium.
    2013-10-25
    oval:com.ubuntu.artful:def:20134421000
    V
    		CVE-2013-4421 on Ubuntu 17.10 (artful) - medium.
    2013-10-25
    oval:com.ubuntu.trusty:def:20134421000
    V
    		CVE-2013-4421 on Ubuntu 14.04 LTS (trusty) - medium.
    2013-10-25
    oval:com.ubuntu.bionic:def:201344210000000
    V
    		CVE-2013-4421 on Ubuntu 18.04 LTS (bionic) - medium.
    2013-10-25
    oval:com.ubuntu.bionic:def:20134421000
    V
    		CVE-2013-4421 on Ubuntu 18.04 LTS (bionic) - medium.
    2013-10-25
    oval:com.ubuntu.xenial:def:20134421000
    V
    		CVE-2013-4421 on Ubuntu 16.04 LTS (xenial) - medium.
    2013-10-25
    oval:com.ubuntu.xenial:def:201344210000000
    V
    		CVE-2013-4421 on Ubuntu 16.04 LTS (xenial) - medium.
    2013-10-25
    oval:com.ubuntu.cosmic:def:20134421000
    V
    		CVE-2013-4421 on Ubuntu 18.10 (cosmic) - medium.
    2013-10-25
    oval:com.ubuntu.precise:def:20134421000
    V
    		CVE-2013-4421 on Ubuntu 12.04 LTS (precise) - medium.
    2013-10-25
    BACK
    dropbear_ssh_project dropbear ssh *
    dropbear_ssh_project dropbear ssh 2011.54