Clients sending negotiation requests with invalid flags could crash the kerberos server (CVE-2009-0845).

GSS-API clients could crash when reading from an invalid address space (CVE-2009-0844).

Invalid length checks could crash applications using the kerberos ASN.1 parser (CVE-2009-0847).

Under certain circumstances the ASN.1 parser could free an uninitialized pointer which could crash a kerberos server or even lead to execution of arbitrary code (CVE-2009-0846).

Clients sending negotiation requests with invalid flags could crash the kerberos server. (CVE-2009-0845)

GSS-API clients could crash when reading from an invalid address space. (CVE-2009-0844)

Invalid length checks could crash applications using the kerberos ASN.1 parser. (CVE-2009-0847)

Under certain circumstances the ASN.1 parser could free an uninitialized pointer which could crash a kerberos server or even lead to execution of arbitrary code. (CVE-2009-0846)

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.

An input validation flaw was found in the ASN.1 (Abstract Syntax Notation One) decoder used by MIT Kerberos. A remote attacker could use this flaw to crash a network service using the MIT Kerberos library, such as kadmind or krb5kdc, by causing it to dereference or free an uninitialized pointer or, possibly, execute arbitrary code with the privileges of the user running the service. (CVE-2009-0846)

All running services using the MIT Kerberos libraries must be restarted for the update to take effect.

s700_800 11.23 KRB5-Client Version 1.0 Cumulative patch : 

Potential security vulnerabilities have been identified on HP-UX running Kerberos. These vulnerabilities could be exploited by remote unauthenticated users to create a Denial of Service (DoS) or to execute arbitrary code.

a. Service Console package krb5 update

   Kerberos is a network authentication protocol. It is designed to    provide strong authentication for client/server applications by    using secret-key cryptography.

   An input validation flaw in the asn1_decode_generaltime function in    MIT Kerberos 5 before 1.6.4 allows remote attackers to cause a    denial of service or possibly execute arbitrary code via vectors    involving an invalid DER encoding that triggers a free of an    uninitialized pointer.

   A remote attacker could use this flaw to crash a network service    using the MIT Kerberos library, such as kadmind or krb5kdc, by    causing it to dereference or free an uninitialized pointer or,    possibly, execute arbitrary code with the privileges of the user    running the service.

   NOTE: ESX by default is unaffected by this issue, the daemons    kadmind and krb5kdc are not installed in ESX.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the name CVE-2009-0846 to this issue.

   In addition the ESX 4.0 Service Console krb5 package was also    updated for CVE-2009-0845, and CVE-2009-0844 and RHBA-2009-0135.

   MIT Kerberos versions 5 1.5 through 1.6.3 might allow remote    attackers to cause a denial of service by using invalid    ContextFlags data in the reqFlags field in a negTokenInit token.

   The Common Vulnerabilities and Exposures Project (cve.mitre.org)    has assigned the name CVE-2009-0845 to this issue.

   MIT Kerberos 5 before version 1.6.4 might allow remote attackers to    cause a denial of service or possibly execute arbitrary code by    using vectors involving an invalid DER encoding that triggers a    free of an uninitialized pointer.

   The Common Vulnerabilities and Exposures Project (cve.mitre.org)    has assigned the name CVE-2009-0846 to this issue.

   For ESX 4.0, 3.5, 3.0.3 the Service Console package pam_krb5 has    also been upgraded.  For details on the non-security issues that    this upgrade addresses, refer to the respective KB article listed    in section 4 below.

Updated krb5 packages that fix a security issue are now available for Red Hat Enterprise Linux 2.1 and 3.

This update has been rated as having critical security impact by the Red Hat Security Response Team.

Kerberos is a network authentication system which allows clients and servers to authenticate to each other using symmetric encryption and a trusted third party, the Key Distribution Center (KDC).

An input validation flaw was found in the ASN.1 (Abstract Syntax Notation One) decoder used by MIT Kerberos. A remote attacker could use this flaw to crash a network service using the MIT Kerberos library, such as kadmind or krb5kdc, by causing it to dereference or free an uninitialized pointer or, possibly, execute arbitrary code with the privileges of the user running the service. (CVE-2009-0846)

All krb5 users should upgrade to these updated packages, which contain a backported patch to correct this issue. All running services using the MIT Kerberos libraries must be restarted for the update to take effect.

The remote OracleVM system is missing necessary patches to address critical security updates :

CVE-2009-0844 The get_input_token function in the SPNEGO implementation in MIT Kerberos 5 (aka krb5) 1.5 through 1.6.3 allows remote attackers to cause a denial of service (daemon crash) and possibly obtain sensitive information via a crafted length value that triggers a buffer over-read.

CVE-2009-0845 The spnego_gss_accept_sec_context function in lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5) 1.5 through 1.6.3, when SPNEGO is used, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via invalid ContextFlags data in the reqFlags field in a negTokenInit token.

CVE-2009-0846 The asn1_decode_generaltime function in lib/krb5/asn.1/asn1_decode.c in the ASN.1 GeneralizedTime decoder in MIT Kerberos 5 (aka krb5) before 1.6.4 allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via vectors involving an invalid DER encoding that triggers a free of an uninitialized pointer.

  - update to revised patch for (CVE-2009-0844,     CVE-2009-0845)

  - add fix for potential buffer read overrun in the SPNEGO     GSSAPI mechanism (#490635, CVE-2009-0844)

  - add fix for NULL pointer dereference when handling     certain error cases in the SPNEGO GSSAPI mechanism     (#490635, CVE-2009-0845)

  - add fix for attempt to free uninitialized pointer in the     ASN.1 decoder (#490635, CVE-2009-0846)

  - add fix for bug in length validation in the ASN.1     decoder (CVE-2009-0847)

  - add backport of svn patch to fix a bug in how the gssapi     library handles certain error cases in     gss_accept_sec_context (CVE-2009-0845, 

  - add a backported patch which adds a check on credentials     obtained from a foreign realm to make sure that they're     of an acceptable type, and if not, retry to the request     to get one of the right type (Sadique Puthen,

  - backport fix from 1.6.3 to register file-based ccaches     created with the krb5_cc_new_unique function with the     global list, so that we don't crash when we go to close     the ccache (#468729)

The remote MiracleLinux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2009-41:01 advisory.

    Kerberos is a network authentication system. The krb5-server package contains the programs that must be     installed on a Kerberos 5 server. If you are installing a Kerberos 5 server, you need to install this     package.
    Fixed bugs:
    CVE-2009-0844     The get_input_token function in the SPNEGO implementation in MIT Kerberos 5 (aka krb5) 1.5 through 1.6.3     allows remote attackers to cause a denial of service (daemon crash) and possibly obtain sensitive     information via a crafted length value that triggers a buffer over-read.
    CVE-2009-0845     The spnego_gss_accept_sec_context function in lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5)     1.6.3, when SPNEGO is used, allows remote attackers to cause a denial of service (NULL pointer dereference     and application crash) via invalid ContextFlags data in the reqFlags field in a negTokenInit token.
    CVE-2009-0846     The asn1_decode_generaltime function in lib/krb5/asn.1/asn1_decode.c in the ASN.1 GeneralizedTime decoder     in MIT Kerberos 5 (aka krb5) before 1.6.4 allows remote attackers to cause a denial of service (daemon     crash) or possibly execute arbitrary code via vectors involving an invalid DER encoding that triggers a     free of an uninitialized pointer.

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

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

An input validation flaw was found in the ASN.1 (Abstract Syntax Notation One) decoder used by MIT Kerberos. A remote attacker could use this flaw to crash a network service using the MIT Kerberos library, such as kadmind or krb5kdc, by causing it to dereference or free an uninitialized pointer. (CVE-2009-0846)

Multiple input validation flaws were found in the MIT Kerberos GSS-API library's implementation of the SPNEGO mechanism. A remote attacker could use these flaws to crash any network service utilizing the MIT Kerberos GSS-API library to authenticate users or, possibly, leak portions of the service's memory. (CVE-2009-0844, CVE-2009-0845)

From Red Hat Security Advisory 2009:0410 :

Updated krb5 packages that fix a security issue are now available for Red Hat Enterprise Linux 2.1 and 3.

This update has been rated as having critical security impact by the Red Hat Security Response Team.

Kerberos is a network authentication system which allows clients and servers to authenticate to each other using symmetric encryption and a trusted third party, the Key Distribution Center (KDC).

An input validation flaw was found in the ASN.1 (Abstract Syntax Notation One) decoder used by MIT Kerberos. A remote attacker could use this flaw to crash a network service using the MIT Kerberos library, such as kadmind or krb5kdc, by causing it to dereference or free an uninitialized pointer or, possibly, execute arbitrary code with the privileges of the user running the service. (CVE-2009-0846)

All krb5 users should upgrade to these updated packages, which contain a backported patch to correct this issue. All running services using the MIT Kerberos libraries must be restarted for the update to take effect.

a. Service Console OS update for COS kernel

   This patch updates the service console kernel to fix multiple    security issues.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the names CVE-2010-0415, CVE-2010-0307,    CVE-2010-0291, CVE-2010-0622, CVE-2010-1087, CVE-2010-1437, and    CVE-2010-1088 to these issues.

b. Likewise package updates

   Updates to the likewisekrb5, likewiseopenldap, likewiseopen,    and pamkrb5 packages address several security issues.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the names CVE-2009-0844, CVE-2009-0845,    CVE-2009-0846, CVE-2009-4212, and CVE-2010-1321 to these issues.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
36122	openSUSE 10 Security Update : krb5 (krb5-6139)	Nessus	SuSE Local Security Checks	2009/4/9	2021/1/14	critical
41415	SuSE 11 Security Update : Kerberos (SAT Patch Number 738)	Nessus	SuSE Local Security Checks	2009/9/24	2021/1/14	critical
301200	NewStart CGSL MAIN 6.06 (SP) : krb5 Multiple Vulnerabilities (NS-SA-2026-0007)	Nessus	NewStart CGSL Local Security Checks	2026/3/6	2026/3/9	critical
60563	Scientific Linux Security Update : krb5 on SL3.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	2012/8/1	2021/1/14	critical
41976	HP-UX PHSS_39765 : HP-UX Running Kerberos, Remote Denial of Service (DoS), Execution of Arbitrary Code (HPSBUX02421 SSRT090047 rev.2)	Nessus	HP-UX Local Security Checks	2009/10/5	2021/1/11	critical
40393	VMSA-2009-0008 : ESX Service Console update for krb5	Nessus	VMware ESX Local Security Checks	2009/7/27	2021/1/6	critical
36107	CentOS 3 : krb5 (CESA-2009:0410)	Nessus	CentOS Local Security Checks	2009/4/8	2021/1/4	critical
79452	OracleVM 2.1 : krb5 (OVMSA-2009-0003)	Nessus	OracleVM Local Security Checks	2014/11/26	2021/1/14	critical
284452	MiracleLinux 3 : krb5-1.6.1-31AXS3.3 (AXSA:2009-41:01)	Nessus	Miracle Linux Local Security Checks	2026/1/14	2026/1/14	high
60564	Scientific Linux Security Update : krb5 on SL4.x, SL5.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	2012/8/1	2021/1/14	critical
67838	Oracle Linux 3 : krb5 (ELSA-2009-0410)	Nessus	Oracle Linux Local Security Checks	2013/7/12	2021/1/14	critical
50611	VMSA-2010-0016 : VMware ESXi and ESX third-party updates for Service Console and Likewise components	Nessus	VMware ESX Local Security Checks	2010/11/16	2021/1/6	critical

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