The RPC library in Kerberos 5 1.4 through 1.4.4, and 1.5 through 1.5.1, as used in Kerberos administration daemon (kadmind) and other products that use this library, calls an uninitialized function pointer in freed memory, which allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unspecified vectors.

The remote NewStart CGSL host, running version MAIN 6.06 (SP), has krb5 packages installed that are affected by multiple vulnerabilities:

  - plugins/preauth/pkinit/pkinit_crypto_openssl.c in MIT Kerberos 5 (aka krb5) through 1.15.2 mishandles     Distinguished Name (DN) fields, which allows remote attackers to execute arbitrary code or cause a denial     of service (buffer overflow and application crash) in situations involving untrusted X.509 data, related     to the get_matching_data and X509_NAME_oneline_ex functions. NOTE: this has security relevance only in use     cases outside of the MIT Kerberos distribution, e.g., the use of get_matching_data in KDC certauth plugin     code that is specific to Red Hat. (CVE-2017-15088)

  - The process_chpw_request function in schpw.c in the password-changing functionality in kadmind in MIT     Kerberos 5 (aka krb5) 1.7 through 1.9 frees an invalid pointer, which allows remote attackers to execute     arbitrary code or cause a denial of service (daemon crash) via a crafted request that triggers an error     condition. (CVE-2011-0285)

  - schpw.c in the kpasswd service in kadmind in MIT Kerberos 5 (aka krb5) before 1.11.3 does not properly     validate UDP packets before sending responses, which allows remote attackers to cause a denial of service     (CPU and bandwidth consumption) via a forged packet that triggers a communication loop, as demonstrated by     krb_pingpong.nasl, a related issue to CVE-1999-0103. (CVE-2002-2443)

  - The (1) ftpd and (2) ksu programs in (a) MIT Kerberos 5 (krb5) up to 1.5, and 1.4.x before 1.4.4, and (b)     Heimdal 0.7.2 and earlier, do not check return codes for setuid calls, which might allow local users to     gain privileges by causing setuid to fail to drop privileges. NOTE: as of 20060808, it is not known     whether an exploitable attack scenario exists for these issues. (CVE-2006-3084)

  - The RPC library in Kerberos 5 1.4 through 1.4.4, and 1.5 through 1.5.1, as used in Kerberos administration     daemon (kadmind) and other products that use this library, calls an uninitialized function pointer in     freed memory, which allows remote attackers to cause a denial of service (crash) and possibly execute     arbitrary code via unspecified vectors. (CVE-2006-6143)

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

The remote NewStart CGSL host, running version MAIN 6.06, has krb5 packages installed that are affected by multiple vulnerabilities:

  - plugins/preauth/pkinit/pkinit_crypto_openssl.c in MIT Kerberos 5 (aka krb5) through 1.15.2 mishandles     Distinguished Name (DN) fields, which allows remote attackers to execute arbitrary code or cause a denial     of service (buffer overflow and application crash) in situations involving untrusted X.509 data, related     to the get_matching_data and X509_NAME_oneline_ex functions. NOTE: this has security relevance only in use     cases outside of the MIT Kerberos distribution, e.g., the use of get_matching_data in KDC certauth plugin     code that is specific to Red Hat. (CVE-2017-15088)

  - The process_chpw_request function in schpw.c in the password-changing functionality in kadmind in MIT     Kerberos 5 (aka krb5) 1.7 through 1.9 frees an invalid pointer, which allows remote attackers to execute     arbitrary code or cause a denial of service (daemon crash) via a crafted request that triggers an error     condition. (CVE-2011-0285)

  - schpw.c in the kpasswd service in kadmind in MIT Kerberos 5 (aka krb5) before 1.11.3 does not properly     validate UDP packets before sending responses, which allows remote attackers to cause a denial of service     (CPU and bandwidth consumption) via a forged packet that triggers a communication loop, as demonstrated by     krb_pingpong.nasl, a related issue to CVE-1999-0103. (CVE-2002-2443)

  - The (1) ftpd and (2) ksu programs in (a) MIT Kerberos 5 (krb5) up to 1.5, and 1.4.x before 1.4.4, and (b)     Heimdal 0.7.2 and earlier, do not check return codes for setuid calls, which might allow local users to     gain privileges by causing setuid to fail to drop privileges. NOTE: as of 20060808, it is not known     whether an exploitable attack scenario exists for these issues. (CVE-2006-3084)

  - The RPC library in Kerberos 5 1.4 through 1.4.4, and 1.5 through 1.5.1, as used in Kerberos administration     daemon (kadmind) and other products that use this library, calls an uninitialized function pointer in     freed memory, which allows remote attackers to cause a denial of service (crash) and possibly execute     arbitrary code via unspecified vectors. (CVE-2006-6143)

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

Bugs in the handling of pointers to uninitializes resp. already freed memory could potentially be abused by attackers to execute code.
(CVE-2006-6144 / CVE-2006-6143)

The server-side portion of Kerberos' RPC library had a memory management flaw which allowed users of that library to call a function pointer located in unallocated memory. By doing specially crafted calls to the kadmind server, a remote attacker could exploit this to execute arbitrary code with root privileges on the target computer.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Bugs in the handling of pointers to uninitializes resp. already freed memory could potentially be abused by attackers to execute code (CVE-2006-6144, CVE-2006-6143).

The remote host is running a version of Mac OS X 10.4 that does not have Security Update 2007-004 applied.

This update fixes security flaws in the following applications :

AFP Client AirPort CarbonCore diskdev_cmds fetchmail ftpd gnutar Help Viewer HID Family Installer Kerberos Libinfo Login Window network_cmds SMB System Configuration URLMount Video Conference WebDAV

A vulnerability in the RPC library in Kerberos 1.4.x and 1.5.x as used in the kadmind administration daemon calls an uninitialized function pointer in freed memory, which could allow a remote attacker to cause a Denial of Service and possibly execute arbitrary code via unspecified vectors.

Updated packages are patched to address this issue.

The remote host is affected by the vulnerability described in GLSA-200701-21 (MIT Kerberos 5: Arbitrary Remote Code Execution)

    The Kerberos administration daemon, and possibly other applications     using the GSS-API or RPC libraries, could potentially call a function     pointer in a freed heap buffer, or attempt to free an uninitialized     pointer.
  Impact :

    A remote attacker may be able to crash an affected application, or     potentially execute arbitrary code with root privileges.
  Workaround :

    There is no known workaround at this time.

This update incorporates a fix for a recently-announced bug found in the kadmind daemon.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update incorporates fixes for recently-announced bugs found in the kadmind daemon.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Type	Severity
301200	NewStart CGSL MAIN 6.06 (SP) : krb5 Multiple Vulnerabilities (NS-SA-2026-0007)	Nessus	NewStart CGSL Local Security Checks	Local	critical
266225	NewStart CGSL MAIN 6.06 : krb5 Multiple Vulnerabilities (NS-SA-2025-0215)	Nessus	NewStart CGSL Local Security Checks	Local	critical
29491	SuSE 10 Security Update : Kerberos5 (ZYPP Patch Number 2440)	Nessus	SuSE Local Security Checks	Local	high
27996	Ubuntu 6.06 LTS / 6.10 : krb5 vulnerability (USN-408-1)	Nessus	Ubuntu Local Security Checks	Local	high
27307	openSUSE 10 Security Update : krb5 (krb5-2442)	Nessus	SuSE Local Security Checks	Local	high
25081	Mac OS X Multiple Vulnerabilities (Security Update 2007-004)	Nessus	MacOS X Local Security Checks	Local	critical
24624	Mandrake Linux Security Advisory : krb5 (MDKSA-2007:008)	Nessus	Mandriva Local Security Checks	Local	high
24257	GLSA-200701-21 : MIT Kerberos 5: Arbitrary Remote Code Execution	Nessus	Gentoo Local Security Checks	Local	high
24190	Fedora Core 5 : krb5-1.4.3-5.3 (2007-034)	Nessus	Fedora Local Security Checks	Local	high
24189	Fedora Core 6 : krb5-1.5-13 (2007-033)	Nessus	Fedora Local Security Checks	Local	high

Detections

Analytics

CVE-2006-6143

critical

Tenable Plugins

critical

critical

high

high

high

critical

high

high

high

high