According to its banner, the version of OpenSSH installed on the remote host is affected by multiple vulnerabilities :

  - A race condition exists that may allow an     unauthenticated, remote attacker to crash the service     or, on portable OpenSSH, possibly execute code on the     affected host.  Note that successful exploitation     requires that GSSAPI authentication be enabled.
    
  - A flaw exists that may allow an attacker to determine     the validity of usernames on some platforms. Note that     this issue requires that GSSAPI authentication be     enabled.

  - When SSH version 1 is used, an issue can be triggered     via an SSH packet that contains duplicate blocks that     could result in a loss of availability for the service.

  - On Fedora Core 6 (and possibly other systems), an     unspecified vulnerability in the     linux_audit_record_event() function allows remote     attackers to inject incorrect information into     audit logs.

The remote NewStart CGSL host, running version MAIN 6.06 (SP), has openssh packages installed that are affected by multiple vulnerabilities:

  - The client in OpenSSH before 7.2 mishandles failed cookie generation for untrusted X11 forwarding and     relies on the local X11 server for access-control decisions, which allows remote X11 clients to trigger a     fallback and obtain trusted X11 forwarding privileges by leveraging configuration issues on this X11     server, as demonstrated by lack of the SECURITY extension on this X11 server. (CVE-2016-1908)

  - Signal handler race condition in OpenSSH before 4.4 allows remote attackers to cause a denial of service     (crash), and possibly execute arbitrary code if GSSAPI authentication is enabled, via unspecified vectors     that lead to a double-free. (CVE-2006-5051)

  - scp in OpenSSH 4.2p1 allows attackers to execute arbitrary commands via filenames that contain shell     metacharacters or spaces, which are expanded twice. (CVE-2006-0225)

  - sshd in OpenSSH before 4.4, when using the version 1 SSH protocol, allows remote attackers to cause a     denial of service (CPU consumption) via an SSH packet that contains duplicate blocks, which is not     properly handled by the CRC compensation attack detector. (CVE-2006-4924)

  - Unspecified vulnerability in the sshd Privilege Separation Monitor in OpenSSH before 4.5 causes weaker     verification that authentication has been successful, which might allow attackers to bypass     authentication. NOTE: as of 20061108, it is believed that this issue is only exploitable by leveraging     vulnerabilities in the unprivileged process, which are not known to exist. (CVE-2006-5794)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Several security problems were fixed in OpenSSH :

  - CVE-2006-4924: A denial of service problem has been     fixed in OpenSSH which could be used to cause lots of     CPU consumption on a remote openssh server.

  - CVE-2006-4925: If a remote attacker is able to inject     network traffic this could be used to cause a client     connection to close.

  - CVE-2006-5051: Fixed an unsafe signal hander reported by     Mark Dowd. The signal handler was vulnerable to a race     condition that could be exploited to perform a     pre-authentication denial of service. This vulnerability     could theoretically lead to pre-authentication remote     code execution if GSSAPI authentication is enabled, but     the likelihood of successful exploitation appears     remote.

  - CVE-2006-5052: Fixed a GSSAPI authentication abort that     could be used to determine the validity of usernames on     some platforms.

The remote NewStart CGSL host, running version MAIN 6.06, has openssh packages installed that are affected by multiple vulnerabilities:

  - The client in OpenSSH before 7.2 mishandles failed cookie generation for untrusted X11 forwarding and     relies on the local X11 server for access-control decisions, which allows remote X11 clients to trigger a     fallback and obtain trusted X11 forwarding privileges by leveraging configuration issues on this X11     server, as demonstrated by lack of the SECURITY extension on this X11 server. (CVE-2016-1908)

  - Signal handler race condition in OpenSSH before 4.4 allows remote attackers to cause a denial of service     (crash), and possibly execute arbitrary code if GSSAPI authentication is enabled, via unspecified vectors     that lead to a double-free. (CVE-2006-5051)

  - scp in OpenSSH 4.2p1 allows attackers to execute arbitrary commands via filenames that contain shell     metacharacters or spaces, which are expanded twice. (CVE-2006-0225)

  - sshd in OpenSSH before 4.4, when using the version 1 SSH protocol, allows remote attackers to cause a     denial of service (CPU consumption) via an SSH packet that contains duplicate blocks, which is not     properly handled by the CRC compensation attack detector. (CVE-2006-4924)

  - Unspecified vulnerability in the sshd Privilege Separation Monitor in OpenSSH before 4.5 causes weaker     verification that authentication has been successful, which might allow attackers to bypass     authentication. NOTE: as of 20061108, it is believed that this issue is only exploitable by leveraging     vulnerabilities in the unprivileged process, which are not known to exist. (CVE-2006-5794)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
22466	OpenSSH < 4.4 Multiple Vulnerabilities	Nessus	Misc.	2006/9/28	2024/3/27	high
301236	NewStart CGSL MAIN 6.06 (SP) : openssh Multiple Vulnerabilities (NS-SA-2026-0003)	Nessus	NewStart CGSL Local Security Checks	2026/3/6	2026/3/6	critical
27365	openSUSE 10 Security Update : openssh (openssh-2183)	Nessus	SuSE Local Security Checks	2007/10/17	2021/1/14	high
266250	NewStart CGSL MAIN 6.06 : openssh Multiple Vulnerabilities (NS-SA-2025-0210)	Nessus	NewStart CGSL Local Security Checks	2025/9/30	2025/9/30	critical

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