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Vulnerability record · CVE-1999-0248 · published 1 January 1999

CVE-1999-0248: Ssh vulnerability

Ssh · Ssh

A race condition in the authentication agent mechanism of sshd 1.2.17 allows an attacker to steal another user's credentials.

10.0 CVSS 2.0 High EPSS 1.6% · top 25.1%
10.0CVSS 2.0 base score
1.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
16 Jun 2026Last modified by NVD

Description

A race condition in the authentication agent mechanism of sshd 1.2.17 allows an attacker to steal another user's credentials.

AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://oliver.efri.hr/~crv/security/bugs/mUNIXes/ssh2.html
http://www.uni-karlsruhe.de/~ig25/ssh-faq/ssh-faq-6.html#ss6.1
http://oliver.efri.hr/~crv/security/bugs/mUNIXes/ssh2.html
http://www.uni-karlsruhe.de/~ig25/ssh-faq/ssh-faq-6.html#ss6.1

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2001-0144Openbsd openssh vulnerabilityCORE SDI SSH1 CRC-32 compensation attack detector allows remote attackers to execute arbitrary commands on an SSH server or client via an integer ove…EPSS 32%8.4CVE-1999-0013Ssh insufficiently protected credentials vulnerabilityStolen credentials from SSH clients via ssh-agent program, allowing other local users to access remote accounts belonging to the ssh-agent user.EPSS 1.1%7.8CVE-2011-0766Erlang crypto vulnerabilityThe random number generator in the Crypto application before 2.0.2.2, and SSH before 2.0.5, as used in the Erlang/OTP ssh library before R14B03, uses…EPSS 3.1%7.5CVE-2001-0572Openbsd openssh vulnerabilityThe SSH protocols 1 and 2 (aka SSH-2) as implemented in OpenSSH and other packages have various weaknesses which can allow a remote attacker to obtai…EPSS 7.1%7.5CVE-2001-0471Ssh vulnerabilitySSH daemon version 1 (aka SSHD-1 or SSH-1) 1.2.30 and earlier does not log repeated login attempts, which could allow remote attackers to compromise …EPSS 5.6%7.5CVE-2001-1473Ssh vulnerabilityThe SSH-1 protocol allows remote servers to conduct man-in-the-middle attacks and replay a client challenge response to a target server by creating a…EPSS 6.3%7.5CVE-2001-1475Ssh vulnerabilitySSH before 2.0, when using RC4 and password authentication, allows remote attackers to replay messages until a new server key (VK) is generated.EPSS 1.5%7.5CVE-2001-1476Ssh vulnerabilitySSH before 2.0, with RC4 encryption and the "disallow NULL passwords" option enabled, makes it easier for remote attackers to guess portions of user …EPSS 1.0%

Source: NIST National Vulnerability Database (record CVE-1999-0248), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.