This update incorporates the upstream patches to correct bugs outlined in MITKRB5-SA-2010-007 (CVE-2010-1323, CVE-2010-1324, and CVE-2010-4020).

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 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2011-0200 advisory.

    - add upstream patches to fix standalone kpropd exiting if the per-client       child process exits with an error, and hang or crash in the KDC when using       the LDAP kdb backend (CVE-2010-4022, CVE-2011-0281, CVE-2011-0282, #671101)
    - incorporate candidate patch to fix various issues from MITKRB5-SA-2010-007       (CVE-2010-1323, CVE-2010-1324, CVE-2010-4020, #651962)

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 host is affected by the vulnerability described in GLSA-201201-13 (MIT Kerberos 5: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in MIT Kerberos 5. Please       review the CVE identifiers referenced below for details.
  Impact :

    A remote attacker may be able to execute arbitrary code with the       privileges of the administration daemon or the Key Distribution Center       (KDC) daemon, cause a Denial of Service condition, or possibly obtain       sensitive information. Furthermore, a remote attacker may be able to       spoof Kerberos authorization, modify KDC responses, forge user data       messages, forge tokens, forge signatures, impersonate a client, modify       user-visible prompt text, or have other unspecified impact.
  Workaround :

    There is no known workaround at this time.

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2010:0925 advisory.

    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).

    Multiple checksum validation flaws were discovered in the MIT Kerberos     implementation. A remote attacker could use these flaws to tamper with     certain Kerberos protocol packets and, possibly, bypass authentication or     authorization mechanisms and escalate their privileges. (CVE-2010-1323,     CVE-2010-1324, CVE-2010-4020)

    Red Hat would like to thank the MIT Kerberos Team for reporting these     issues.

    This update also fixes the following bug:

    * When attempting to perform PKINIT pre-authentication, if the client had     more than one possible candidate certificate the client could fail to     select the certificate and key to use. This usually occurred if certificate     selection was configured to use the value of the keyUsage extension, or if     any of the candidate certificates did not contain a subjectAltName     extension. Consequently, the client attempted to perform pre-authentication     using a different (usually password-based) mechanism. (BZ#644825)

    All krb5 users should upgrade to these updated packages, which contain     backported patches to correct these issues. After installing the updated     packages, the krb5kdc daemon will be restarted automatically.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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 MIT Kerberos team reports :

MIT krb5 incorrectly accepts an unkeyed checksum for PAC signatures.

An authenticated remote attacker can forge PACs if using a KDC that does not filter client-provided PAC data. This can result in privilege escalation against a service that relies on PAC contents to make authorization decisions.

It was discovered that Kerberos did not properly determine the acceptability of certain checksums. A remote attacker could use certain checksums to alter the prompt message, modify a response to a Key Distribution Center (KDC) or forge a KRB-SAFE message.
(CVE-2010-1323)

It was discovered that Kerberos did not properly determine the acceptability of certain checksums. A remote attacker could use certain checksums to forge GSS tokens or gain privileges. This issue only affected Ubuntu 9.10, 10.04 LTS and 10.10. (CVE-2010-1324)

It was discovered that Kerberos did not reject RC4 key-derivation checksums. An authenticated remote user could use this issue to forge AD-SIGNEDPATH or AD-KDC-ISSUED signatures and possibly gain privileges. This issue only affected Ubuntu 10.04 LTS and 10.10.
(CVE-2010-4020)

It was discovered that Kerberos did not properly restrict the use of TGT credentials for armoring TGS requests. A remote authenticated user could use this flaw to impersonate a client. This issue only affected Ubuntu 9.10. (CVE-2010-4021).

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.

Multiple remote vulnerabilities in the MIT krb5 package have been fixed. They affect client as well as server software.

s700_800 11.31 KRB5-Client Version 1.3.5.03 Cumulative patch : 

Potential security vulnerabilities have been identified on HP-UX running Kerberos. These vulnerabilities could be exploited remotely by an unauthorized user to modify data, prompts, or responses.

The remote host is running a version of Mac OS X 10.6.x that is prior to 10.6.7.

Mac OS X 10.6.7 contains security fixes for the following products :

  - AirPort
  - Apache
  - AppleScript
  - ATS
  - bzip2
  - CarbonCore
  - ClamAV
  - CoreText
  - File Quarantine
  - HFS
  - ImageIO
  - Image RAW
  - Installer
  - Kerberos
  - Kernel
  - Libinfo
  - libxml
  - Mailman
  - PHP
  - QuickLook
  - QuickTime
  - Ruby
  - Samba
  - Subversion
  - Terminal
  - X11

Multiple remote vulnerabilities in the MIT krb5 package have been fixed. They affect client as well as server software. CVE-2010-1323, CVE-2010-1324,CVE-2010-4020 and CVE-2010-4021 have been assigned to this issue.

The Oracle Secure Global Desktop installed on the remote host is version 4.63 / 4.71 / 5.1 / 5.2. It is, therefore, affected by the following vulnerabilities :

  - A security bypass vulnerability exists in Kerberos 5 due     to a failure to properly determine the acceptability of     checksums. A remote attacker can exploit this to forge     tokens or gain privileges by using an unkeyed checksum.
    (CVE-2010-1324)

  - A NULL pointer deference flaw exists in the function     bdfReadCharacters() in file bdfread.c of the X.Org     libXfont module due to improper handling of non-readable     character bitmaps. An authenticated, remote attacker,     using a crafted BDF font file, can exploit this to     cause a denial of service or execute arbitrary code.
    (CVE-2015-1803)

  - An out-of-bounds read/write error exists in the     SProcXFixesSelectSelectionInput() function in the     XFixes extension. A remote, authenticated attacker,     using a crafted length value, can exploit this to     cause a denial of service or execute arbitrary code.
    (CVE-2014-8102)

  - A remote attacker, by using a crafted string length     value in an XkbSetGeometry request, can gain access to     sensitive information from process memory or cause a     denial of service. (CVE-2015-0255)

  - An invalid read error exists in the ASN1_TYPE_cmp()     function due to improperly performed boolean-type     comparisons. A remote attacker can exploit this, via a     crafted X.509 certificate to an endpoint that uses the     certificate-verification feature, to cause an invalid     read operation, resulting in a denial of service.
    (CVE-2015-0286)

  - A denial of service vulnerability exists in Apache     Tomcat due to improper handling of HTTP responses     that occurs before finishing reading an entire request     body. A remote attacker can exploit this by using a     crafted series of aborted upload attempts.
    (CVE-2014-0230)

  - A denial of service vulnerability exists in Apache     Tomcat in ChunkedInputFilter.java due to improper     handling of attempts to read data after an error has     occurred. A remote attacker can exploit this by     streaming data with malformed chunked-transfer     encoding. (CVE-2014-0227)

  - A NULL pointer dereference flaw exists in the     dtls1_get_record() function when handling DTLS messages.
    A remote attacker, using a specially crafted DTLS     message, can cause a denial of service. (CVE-2014-3571)

  - An unspecified flaw exists that is related to the     JServer subcomponent. A remote attacker can exploit this     to impact confidentiality and integrity. No further     details have been provided. (CVE-2015-2581)

Multiple vulnerabilities were discovered and corrected in krb5 :

An unauthenticated remote attacker could alter a SAM-2 challenge, affecting the prompt text seen by the user or the kind of response sent to the KDC. Under some circumstances, this can negate the incremental security benefit of using a single-use authentication mechanism token. An unauthenticated remote attacker has a 1/256 chance of forging KRB-SAFE messages in an application protocol if the targeted pre-existing session uses an RC4 session key. Few application protocols use KRB-SAFE messages (CVE-2010-1323).

An unauthenticated remote attacker can forge GSS tokens that are intended to be integrity-protected but unencrypted, if the targeted pre-existing application session uses a DES session key. An authenticated remote attacker can forge PACs if using a KDC that does not filter client-provided PAC data. This can result in privilege escalation against a service that relies on PAC contents to make authorization decisions. An unauthenticated remote attacker has a 1/256 chance of swapping a client-issued KrbFastReq into a different KDC-REQ, if the armor key is RC4. The consequences are believed to be minor (CVE-2010-1324).

An authenticated remote attacker that controls a legitimate service principal has a 1/256 chance of forging the AD-SIGNEDPATH signature if the TGT key is RC4, allowing it to use self-generated evidence tickets for S4U2Proxy, instead of tickets obtained from the user or with S4U2Self. Configurations using RC4 for the TGT key are believed to be rare. An authenticated remote attacker has a 1/256 chance of forging AD-KDC-ISSUED signatures on authdata elements in tickets having an RC4 service key, resulting in privilege escalation against a service that relies on these signatures. There are no known uses of the KDC-ISSUED authdata container at this time (CVE-2010-4020.

An authenticated remote attacker that controls a legitimate service principal could obtain a valid service ticket to itself containing valid KDC-generated authorization data for a client whose TGS-REQ it has intercepted. The attacker could then use this ticket for S4U2Proxy to impersonate the targeted client even if the client never authenticated to the subverted service. The vulnerable configuration is believed to be rare (CVE-2010-4021).

The updated packages have been patched to correct this issue.

Updated krb5 packages that fix multiple security issues are now available for Red Hat Enterprise Linux 4 and 5.

The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

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).

Multiple checksum validation flaws were discovered in the MIT Kerberos implementation. A remote attacker could use these flaws to tamper with certain Kerberos protocol packets and, possibly, bypass authentication mechanisms in certain configurations using Single-use Authentication Mechanisms. (CVE-2010-1323)

Red Hat would like to thank the MIT Kerberos Team for reporting these issues.

All krb5 users should upgrade to these updated packages, which contain a backported patch to correct these issues. After installing the updated packages, the krb5kdc daemon will be restarted automatically.

The remote VMware ESX / ESXi host is missing a security-related patch.
It is, therefore, affected by multiple vulnerabilities :

  - Multiple forgery vulnerabilities exist in the bundled     version of MIT Kerberos 5 (krb5). An attacker can     exploit these issues to impersonate a client, escalate     privileges, and disclose sensitive information.
    (CVE-2010-1323, CVE-2010-1324, CVE-2010-4020,     CVE-2010-4021)

  - A local arbitrary code execution vulnerability exists in     the Kernel in the do_anonymous_page() function due to     improper separation of the stack and the heap. A local     attacker can exploit this vulnerability to execute     arbitrary code. (CVE-2010-2240)

  - A denial of service vulnerability exists that allows a     remote attacker to exhaust available sockets, preventing     further connections. (CVE-2011-1785)

  - A denial of service vulnerability exists in the bundled     version of lsassd in Likewise Open. A remote attacker     can exploit this, via an Active Directory login attempt     that provides a username containing an invalid byte     sequence, to cause a daemon crash. (CVE-2011-1786)

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
51083	Fedora 14 : krb5-1.8.2-7.fc14 (2010-18409)	Nessus	Fedora Local Security Checks	2010/12/9	2021/1/11	medium
68196	Oracle Linux 6 : krb5 (ELSA-2011-0200)	Nessus	Oracle Linux Local Security Checks	2013/7/12	2024/10/22	medium
57655	GLSA-201201-13 : MIT Kerberos 5: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	2012/1/24	2021/1/6	medium
50852	RHEL 6 : krb5 (RHSA-2010:0925)	Nessus	Red Hat Local Security Checks	2010/12/1	2025/4/14	medium
51104	FreeBSD : krb5 -- unkeyed PAC checksum handling vulnerability (9f971cea-03f5-11e0-bf50-001a926c7637)	Nessus	FreeBSD Local Security Checks	2010/12/10	2021/1/6	low
51116	Ubuntu 6.06 LTS / 8.04 LTS / 9.10 / 10.04 LTS / 10.10 : krb5 vulnerabilities (USN-1030-1)	Nessus	Ubuntu Local Security Checks	2010/12/10	2019/9/19	medium
51159	SuSE 10 Security Update : krb5 (ZYPP Patch Number 7243)	Nessus	SuSE Local Security Checks	2010/12/14	2021/1/14	medium
51659	HP-UX PHSS_41775 : HP-UX Running Kerberos, Remote Unauthorized Modification (HPSBUX02623 SSRT100355 rev.1)	Nessus	HP-UX Local Security Checks	2011/1/24	2021/1/11	low
52754	Mac OS X 10.6.x < 10.6.7 Multiple Vulnerabilities	Nessus	MacOS X Local Security Checks	2011/3/22	2024/5/28	high
53672	openSUSE Security Update : krb5 (openSUSE-SU-2010:1053-1)	Nessus	SuSE Local Security Checks	2011/5/5	2021/1/14	medium
84795	Oracle Secure Global Desktop Multiple Vulnerabilities (July 2015 CPU)	Nessus	Misc.	2015/7/16	2021/10/25	high
50849	Mandriva Linux Security Advisory : krb5 (MDVSA-2010:246)	Nessus	Mandriva Local Security Checks	2010/12/1	2021/1/6	medium
50863	CentOS 4 / 5 : krb5 (CESA-2010:0926)	Nessus	CentOS Local Security Checks	2010/12/2	2021/1/4	medium
75559	openSUSE Security Update : krb5 (openSUSE-SU-2010:1053-1)	Nessus	SuSE Local Security Checks	2014/6/13	2021/1/14	medium
89676	VMware ESX / ESXi Multiple Vulnerabilities (VMSA-2011-0007) (remote check)	Nessus	Misc.	2016/3/4	2021/1/6	high

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