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.

Multiple vulnerabilities have been found in krb5, the MIT implementation of Kerberos :

  - CVE-2014-5352     Incorrect memory management in the libgssapi_krb5     library might result in denial of service or the     execution of arbitrary code.

  - CVE-2014-9421     Incorrect memory management in kadmind's processing of     XDR data might result in denial of service or the     execution of arbitrary code.

  - CVE-2014-9422     Incorrect processing of two-component server principals     might result in impersonation attacks.

  - CVE-2014-9423     An information leak in the libgssrpc library.

The remote Ubuntu 14.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-2498-1 advisory.

    It was discovered that Kerberos incorrectly sent old keys in response to a -randkey -keepold request. An     authenticated remote attacker could use this issue to forge tickets by leveraging administrative access.
    This issue only affected Ubuntu 10.04 LTS, Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-5351)

    It was discovered that the libgssapi_krb5 library incorrectly processed security context handles. A remote     attacker could use this issue to cause a denial of service, or possibly execute arbitrary code.
    (CVE-2014-5352)

    Patrik Kis discovered that Kerberos incorrectly handled LDAP queries with no results. An authenticated     remote attacker could use this issue to cause the KDC to crash, resulting in a denial of service.
    (CVE-2014-5353)

    It was discovered that Kerberos incorrectly handled creating database entries for a keyless principal when     using LDAP. An authenticated remote attacker could use this issue to cause the KDC to crash, resulting in     a denial of service. (CVE-2014-5354)

    It was discovered that Kerberos incorrectly handled memory when processing XDR data. A remote attacker     could use this issue to cause kadmind to crash, resulting in a denial of service, or possibly execute     arbitrary code. (CVE-2014-9421)

    It was discovered that Kerberos incorrectly handled two-component server principals. A remote attacker     could use this issue to perform impersonation attacks. (CVE-2014-9422)

    It was discovered that the libgssrpc library leaked uninitialized bytes. A remote attacker could use this     issue to possibly obtain sensitive information. (CVE-2014-9423)

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

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

Updated krb5 packages that fix multiple security issues, several bugs, and add various enhancements are now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

Kerberos is a networked authentication system which allows clients and servers to authenticate to each other with the help of a trusted third party, the Kerberos KDC.

A NULL pointer dereference flaw was found in the MIT Kerberos SPNEGO acceptor for continuation tokens. A remote, unauthenticated attacker could use this flaw to crash a GSSAPI-enabled server application.
(CVE-2014-4344)

A buffer overflow was found in the KADM5 administration server (kadmind) when it was used with an LDAP back end for the KDC database.
A remote, authenticated attacker could potentially use this flaw to execute arbitrary code on the system running kadmind. (CVE-2014-4345)

A use-after-free flaw was found in the way the MIT Kerberos libgssapi_krb5 library processed valid context deletion tokens. An attacker able to make an application using the GSS-API library (libgssapi) call the gss_process_context_token() function could use this flaw to crash that application. (CVE-2014-5352)

If kadmind were used with an LDAP back end for the KDC database, a remote, authenticated attacker with the permissions to set the password policy could crash kadmind by attempting to use a named ticket policy object as a password policy for a principal.
(CVE-2014-5353)

A double-free flaw was found in the way MIT Kerberos handled invalid External Data Representation (XDR) data. An authenticated user could use this flaw to crash the MIT Kerberos administration server (kadmind), or other applications using Kerberos libraries, using specially crafted XDR packets. (CVE-2014-9421)

It was found that the MIT Kerberos administration server (kadmind) incorrectly accepted certain authentication requests for two-component server principal names. A remote attacker able to acquire a key with a particularly named principal (such as 'kad/x') could use this flaw to impersonate any user to kadmind, and perform administrative actions as that user. (CVE-2014-9422)

An information disclosure flaw was found in the way MIT Kerberos RPCSEC_GSS implementation (libgssrpc) handled certain requests. An attacker could send a specially crafted request to an application using libgssrpc to disclose a limited portion of uninitialized memory used by that application. (CVE-2014-9423)

Two buffer over-read flaws were found in the way MIT Kerberos handled certain requests. A remote, unauthenticated attacker able to inject packets into a client or server application's GSSAPI session could use either of these flaws to crash the application. (CVE-2014-4341, CVE-2014-4342)

A double-free flaw was found in the MIT Kerberos SPNEGO initiators. An attacker able to spoof packets to appear as though they are from an GSSAPI acceptor could use this flaw to crash a client application that uses MIT Kerberos. (CVE-2014-4343)

Red Hat would like to thank the MIT Kerberos project for reporting the CVE-2014-5352, CVE-2014-9421, CVE-2014-9422, and CVE-2014-9423 issues.
MIT Kerberos project acknowledges Nico Williams for helping with the analysis of CVE-2014-5352.

The krb5 packages have been upgraded to upstream version 1.12, which provides a number of bug fixes and enhancements, including :

* Added plug-in interfaces for principal-to-username mapping and verifying authorization to user accounts.

* When communicating with a KDC over a connected TCP or HTTPS socket, the client gives the KDC more time to reply before it transmits the request to another server. (BZ#1049709, BZ#1127995)

This update also fixes multiple bugs, for example :

* The Kerberos client library did not recognize certain exit statuses that the resolver libraries could return when looking up the addresses of servers configured in the /etc/krb5.conf file or locating Kerberos servers using DNS service location. The library could treat non-fatal return codes as fatal errors. Now, the library interprets the specific return codes correctly. (BZ#1084068, BZ#1109102)

In addition, this update adds various enhancements. Among others :

* Added support for contacting KDCs and kpasswd servers through HTTPS proxies implementing the Kerberos KDC Proxy (KKDCP) protocol.
(BZ#1109919)

Security fix for CVE-2014-5352, CVE-2014-9421, CVE-2014-9422, CVE-2014-9423 Security fix for CVE-2014-5351

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.

Security fix for CVE-2014-5352, CVE-2014-9421, CVE-2014-9422, CVE-2014-9423

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.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2015-0439 advisory.

    - fix for CVE-2014-5352 (#1179856) 'gss_process_context_token()       incorrectly frees context (MITKRB5-SA-2015-001)'
    - fix for CVE-2014-9421 (#1179857) 'kadmind doubly frees partial       deserialization results (MITKRB5-SA-2015-001)'
    - fix for CVE-2014-9422 (#1179861) 'kadmind incorrectly       validates server principal name (MITKRB5-SA-2015-001)'
    - fix for CVE-2014-9423 (#1179863) 'libgssrpc server applications       leak uninitialized bytes (MITKRB5-SA-2015-001)'
    - fix for CVE-2014-5354 (#1174546) 'krb5: NULL pointer       dereference when using keyless entries'
    - fix for CVE-2014-5353 (#1174543) 'Fix LDAP misused policy       name crash'
    - update to 1.12.2
      - drop patch for RT#7820, fixed in 1.12.2
      - drop patch for #231147, fixed as RT#3277 in 1.12.2
      - drop patch for RT#7818, fixed in 1.12.2
      - drop patch for RT#7836, fixed in 1.12.2
      - drop patch for RT#7858, fixed in 1.12.2
      - drop patch for RT#7924, fixed in 1.12.2
      - drop patch for RT#7926, fixed in 1.12.2
      - drop patches for CVE-2014-4341/CVE-2014-4342, included in 1.12.2
      - drop patch for CVE-2014-4343, included in 1.12.2
      - drop patch for CVE-2014-4344, included in 1.12.2
      - drop patch for CVE-2014-4345, included in 1.12.2
    - incorporate fix for MITKRB5-SA-2014-001 (CVE-2014-4345)
    - gssapi: pull in upstream fix for a possible NULL dereference       in spnego (CVE-2014-4344)
    - gssapi: pull in proposed fix for a double free in initiators (David       Woodhouse, CVE-2014-4343, #1117963)
    - pull in fix for denial of service by injection of malformed GSSAPI tokens       (CVE-2014-4341, CVE-2014-4342, #1116181)

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

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

The remote Oracle Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2015-0794 advisory.

    - fix for CVE-2014-5355 (#1193939) 'krb5: unauthenticated       denial of service in recvauth_common() and others'
    - fix for CVE-2014-5353 (#1174543) 'Fix LDAP misused policy       name crash'
    - fix for CVE-2014-5352 (#1179856) 'gss_process_context_token()       incorrectly frees context (MITKRB5-SA-2015-001)'
    - fix for CVE-2014-9421 (#1179857) 'kadmind doubly frees partial       deserialization results (MITKRB5-SA-2015-001)'

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

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

A use-after-free flaw was found in the way the MIT Kerberos libgssapi_krb5 library processed valid context deletion tokens. An attacker able to make an application using the GSS-API library (libgssapi) could call the gss_process_context_token() function and use this flaw to crash that application. (CVE-2014-5352)

If kadmind were used with an LDAP back end for the KDC database, a remote, authenticated attacker who has the permissions to set the password policy could crash kadmind by attempting to use a named ticket policy object as a password policy for a principal.
(CVE-2014-5353)

It was found that the krb5_read_message() function of MIT Kerberos did not correctly sanitize input, and could create invalid krb5_data objects. A remote, unauthenticated attacker could use this flaw to crash a Kerberos child process via a specially crafted request.
(CVE-2014-5355)

A double-free flaw was found in the way MIT Kerberos handled invalid External Data Representation (XDR) data. An authenticated user could use this flaw to crash the MIT Kerberos administration server (kadmind), or other applications using Kerberos libraries, via specially crafted XDR packets. (CVE-2014-9421)

It was found that the MIT Kerberos administration server (kadmind) incorrectly accepted certain authentication requests for two-component server principal names. A remote attacker able to acquire a key with a particularly named principal (such as 'kad/x') could use this flaw to impersonate any user to kadmind, and perform administrative actions as that user. (CVE-2014-9422)

The version of the Network Authentication Service (NAS) installed on the remote AIX host is affected by the following vulnerabilities related to Kerberos 5 :

  - Denial of service and remote code execution     vulnerabilities exist due to security context handles     not being properly maintained, allowing an     authenticated, remote attacker to crash the service or     execute arbitrary code using crafted GSSAPI traffic.
    (CVE-2014-5352)

  - A denial of service vulnerability exists due to improper     handling of zero-byte or unterminated strings.
    (CVE-2014-5355)

  - Denial of service and remote code execution     vulnerabilities exist which allow an authenticated,     remote attacker to crash the service or execute     arbitrary code using crafted, malformed XDR data.
    (CVE-2014-9421)

  - A privilege escalation vulnerability exists that allows     an authenticated, remote attacker to gain administrative     access via a flaw in kadmin authorization checks.
    (CVE-2014-9422)

  - An information disclosure vulnerability allows an     attacker to gain information about process heap memory     from NAS packets. (CVE-2014-9423)

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
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
81150	Debian DSA-3153-1 : krb5 - security update	Nessus	Debian Local Security Checks	2015/2/4	2021/1/11	high
81297	Ubuntu 14.04 LTS : Kerberos vulnerabilities (USN-2498-1)	Nessus	Ubuntu Local Security Checks	2015/2/11	2025/9/3	high
81637	RHEL 7 : krb5 (RHSA-2015:0439)	Nessus	Red Hat Local Security Checks	2015/3/5	2019/10/24	high
81705	Fedora 20 : krb5-1.11.5-18.fc20 (2015-2382)	Nessus	Fedora Local Security Checks	2015/3/10	2021/1/11	high
81796	Fedora 21 : krb5-1.12.2-14.fc21 (2015-2347)	Nessus	Fedora Local Security Checks	2015/3/13	2021/1/11	high
81805	Oracle Linux 7 : krb5 (ELSA-2015-0439)	Nessus	Oracle Linux Local Security Checks	2015/3/13	2024/11/1	critical
82689	Oracle Linux 6 : krb5 (ELSA-2015-0794)	Nessus	Oracle Linux Local Security Checks	2015/4/10	2024/10/23	high
83269	Amazon Linux AMI : krb5 (ALAS-2015-518)	Nessus	Amazon Linux Local Security Checks	2015/5/7	2018/4/18	high
83874	AIX NAS Advisory : nas_advisory3.asc	Nessus	AIX Local Security Checks	2015/5/28	2023/4/21	high

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