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CVE-2002-0083

CWE-193Published: March 15, 2002· Updated: Jun 16, 2026

9.8

CVSS v3.1

Official Description

Off-by-one error in the channel code of OpenSSH 2.0 through 3.0.2 allows local users or remote malicious servers to gain privileges.

Technical Analysis

CVE-2002-0083 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

A proof-of-concept (PoC) exploit exists for CVE-2002-0083. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected Vendors & Products

conectiva1 product(s)

linux

engardelinux1 product(s)

secure linux

immunix1 product(s)

immunix

mandrakesoft3 product(s)

mandrake single network firewallmandrake linuxmandrake linux corporate server

openbsd1 product(s)

openssh

openpkg1 product(s)

openpkg

Red Hat1 product(s)

linux

SUSE1 product(s)

suse linux

trustix1 product(s)

secure linux

Source: NVD CPE · 27 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://marc.info/?l=bugtraq&m=101586991827622&w=2

PATCHhttp://www.linuxsecurity.com/advisories/other_advisory-1937.html

PATCHhttp://marc.info/?l=bugtraq&m=101586991827622&w=2

PATCHhttp://www.linuxsecurity.com/advisories/other_advisory-1937.html

ADVISORYhttp://online.securityfocus.com/advisories/3960

ADVISORYhttp://online.securityfocus.com/archive/1/264657

ADVISORYhttp://www.debian.org/security/2002/dsa-119

ADVISORYhttp://www.openbsd.org/advisories/ssh_channelalloc.txt

ADVISORYhttp://www.securityfocus.com/bid/4241

ADVISORYhttp://online.securityfocus.com/advisories/3960

ADVISORYhttp://online.securityfocus.com/archive/1/264657

ADVISORYhttp://www.debian.org/security/2002/dsa-119

ADVISORYhttp://www.openbsd.org/advisories/ssh_channelalloc.txt

ADVISORYhttp://www.securityfocus.com/bid/4241

All References (46)

→

ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:13.openssh.ascBroken Link

→

ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2002-004.txt.ascBroken Link

→

ftp://stage.caldera.com/pub/security/openserver/CSSA-2002-SCO.10/CSSA-2002-SCO.10.txtBroken Link

→

ftp://stage.caldera.com/pub/security/openunix/CSSA-2002-SCO.11/CSSA-2002-SCO.11.txtBroken Link

→

http://archives.neohapsis.com/archives/bugtraq/2002-03/0108.htmlBroken Link

→

http://archives.neohapsis.com/archives/vulnwatch/2002-q1/0060.htmlBroken Link

→

http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000467Broken Link

→

http://marc.info/?l=bugtraq&m=101552065005254&w=2Mailing List

→

http://marc.info/?l=bugtraq&m=101553908201861&w=2Mailing List

→

http://marc.info/?l=bugtraq&m=101561384821761&w=2Mailing List

→

http://marc.info/?l=bugtraq&m=101586991827622&w=2Mailing List · Patch

→

http://online.securityfocus.com/advisories/3960Broken Link · Third Party Advisory · VDB Entry

→

http://online.securityfocus.com/archive/1/264657Broken Link · Third Party Advisory · VDB Entry

→

http://www.calderasystems.com/support/security/advisories/CSSA-2002-012.0.txtBroken Link

→

http://www.debian.org/security/2002/dsa-119Broken Link · Vendor Advisory

Quick Facts

CVE IDCVE-2002-0083

CVSS Score9.8 / 10

SeverityCRITICAL

WeaknessCWE-193

CISA KEVNo

ExploitPOC

Affected9 vendor(s)

PublishedMar 15, 2002

Related CVEs (CWE-193)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2002-0083 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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