Integer overflow in sshd in OpenSSH 2.9.9 through 3.3 allows remote attackers to execute arbitrary code during challenge response authentication (ChallengeResponseAuthentication) when OpenSSH is using SKEY or BSD_AUTH authentication.
Published 2002-07-03 04:00:00
Updated 2024-02-08 18:37:46
Source MITRE
View at NVD,   CVE.org
Vulnerability category: OverflowExecute code

Products affected by CVE-2002-0639

Threat overview for CVE-2002-0639

Top countries where our scanners detected CVE-2002-0639
Top open port discovered on systems with this issue 22
IPs affected by CVE-2002-0639 4,008
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2002-0639!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2002-0639

42.60%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 97 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2002-0639

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
10.0
HIGH AV:N/AC:L/Au:N/C:C/I:C/A:C
10.0
10.0
NIST
9.8
CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.9
5.9
NIST 2024-02-08

CWE ids for CVE-2002-0639

  • The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
    Assigned by: nvd@nist.gov (Primary)

Vendor statements for CVE-2002-0639

  • Red Hat 2008-05-15
    Not vulnerable. This issue did not affect the versions of OpenSSH as shipped with Red Hat Enterprise Linux 3 or later. This issue did not affect the OpenSSL packages as shipped with Red Hat Enterprise Linux 2.1 as they were not compiled with S/Key or BSD_AUTH support. The upstream patch for this issue and CVE-2002-0640 was included in an errata so that users recompiling OpenSSL with support for those authentication methods would also be protected: https://rhn.redhat.com/errata/RHSA-2002-131.html

References for CVE-2002-0639

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