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·µ»ØÁбí

¡¾Îó²îͨ¸æ¡¿F5 BIG-IP/BIG-IQ ¶à¸ö¸ßΣÎó²îͨ¸æ

2021-03-11

Ò».  Îó²î¸ÅÊö

3ÔÂ11ÈÕ £¬AG¹«Ë¾¿Æ¼¼¼à²âµ½F5¹Ù·½Ðû²¼Ç徲ͨ¸æ £¬ÐÞ¸´ÁËÓ°ÏìF5µÄBIG-IPºÍBIG-IQµÄ¶à¸ö¸ßΣÎó²î£¨CVE-2021-22986 £¬CVE-2021-22987 £¬CVE-2021-22988 £¬CVE-2021-22989 £¬CVE-2021-22990 £¬CVE-2021-22991 £¬CVE-2021-22992£© £¬½¨ÒéÏà¹ØÓû§½ÓÄɲ½·¥¾ÙÐзÀ»¤¡£

BIG-IP ÊÇÃÀ¹ú F5 ¹«Ë¾µÄÒ»¿î¼¯³ÉÁËÍøÂçÁ÷Á¿ÖÎÀí¡¢Ó¦ÓóÌÐòÇå¾²ÖÎÀí¡¢¸ºÔØÆ½ºâµÈ¹¦Ð§µÄÓ¦Óý»¸¶Æ½Ì¨¡£BIG-IQ ÊÇÒ»¿îÓÃÓÚÖÎÀíºÍЭµ÷ F5 Çå¾²ÓëÓ¦Óý»¸¶½â¾ö¼Æ»®µÄÖÇÄÜ¿ò¼Ü¡£

²Î¿¼Á´½Ó£º

https://support.f5.com/csp/article/K02566623

 

¶þ.  ÖصãÎó²îÐÎò

iControl RESTÔ¶³ÌÏÂÁîÖ´ÐÐÎó²î£¨CVE-2021-22986£©£º

δ¾­Éí·ÝÑéÖ¤µÄ¹¥»÷ÕßʹÓÿØÖƽçÃæ¾ÙÐÐʹÓà £¬Í¨¹ýBIG-IPÖÎÀí½çÃæ»ò×ÔÉíIPµØµã¶ÔiControl REST½Ó¿Ú¾ÙÐÐÍøÂç»á¼û £¬¿ÉÖ´ÐÐí§ÒâϵͳÏÂÁî £¬½¨Éè»òɾ³ýÎļþÒÔ¼°½ûÓ÷þÎñ £¬×°±¸Ä£Ê½ÏµÄBIG-IPϵͳҲÈÝÒ×Êܵ½¹¥»÷¡£CVSSÆÀ·ÖΪ9.8¡£

¹Ù·½Í¨¸æÁ´½Ó£º

https://support.f5.com/csp/article/K03009991

 

Á÷Á¿ÖÎÀíÓû§½çÃæ£¨TMUI£©Ô¶³ÌÏÂÁîÖ´ÐÐÎó²î£¨CVE-2021-22987£©£º

µ±ÒÔ×°±¸Ä£Ê½ÔËÐÐʱ £¬¾­ÓÉÉí·ÝÑéÖ¤µÄ¹¥»÷ÕßʹÓÿØÖƽçÃæ¾ÙÐÐʹÓà £¬Í¨¹ýBIG-IPÖÎÀí¶Ë¿Ú»ò×ÔÉíIP»á¼ûTMUI £¬¿ÉÄܵ¼ÖÂϵͳÍêÈ«ÊÜËð²¢ÆÆËð×°±¸Ä£Ê½ £¬CVSSÆÀ·ÖΪ9.9¡£

¹Ù·½Í¨¸æÁ´½Ó£º

https://support.f5.com/csp/article/K18132488

 

TMUIÔ¶³ÌÏÂÁîÖ´ÐÐÎó²î£¨CVE-2021-22988£©£º

¾­ÓÉÉí·ÝÑéÖ¤µÄ¹¥»÷ÕßʹÓÿØÖƽçÃæÊ¹ÓôËÎó²î £¬Í¨¹ýBIG-IPÖÎÀí¶Ë¿Ú»ò×ÔÉíIP»á¼ûTMUI £¬¿ÉÖ´ÐÐí§ÒâϵͳÏÂÁî £¬½¨Éè»òɾ³ýÎļþ»ò½ûÓ÷þÎñ¡£

¹Ù·½Í¨¸æÁ´½Ó£º

https://support.f5.com/csp/article/K70031188

 

×°±¸Ä£Ê½Advanced WAF/ASM TMUI Ô¶³ÌÏÂÁîÖ´ÐÐÎó²î£¨CVE-2021-22989£©£º

µ±ÔÚ×°±¸Ä£Ê½ÏÂÉèÖÃÁËAdvanced WAF»òASMʱ £¬¾ßÓÐÖÎÀíÔ± £¬×ÊÔ´ÖÎÀíÔ±»òÓ¦ÓóÌÐòÇå¾²ÖÎÀíÔ±½ÇÉ«Éí·ÝµÄ¹¥»÷Õßͨ¹ýBIG-IPÖÎÀí¶Ë¿Ú»ò×ÔÉíµØµã»á¼ûTMUI £¬¿ÉÖ´ÐÐí§ÒâϵͳÏÂÁî £¬½¨Éè»òɾ³ýÎļþ £¬»ò½ûÓ÷þÎñ¡£

¹Ù·½Í¨¸æÁ´½Ó£º

https://support.f5.com/csp/article/K56142644

 

Advanced WAF/ASM TMUI Ô¶³ÌÏÂÁîÖ´ÐÐÎó²î£¨CVE-2021-22990£©£º

ÔÚÅ䱸ÁËAdvanced WAF»òBIG-IP ASMµÄϵͳÉÏ £¬¾ßÓÐÖÎÀíÔ± £¬×ÊÔ´ÖÎÀíÔ±»òÓ¦ÓóÌÐòÇå¾²ÖÎÀíÔ±½ÇÉ«Éí·ÝµÄ¹¥»÷Õßͨ¹ýBIG-IPÖÎÀí¶Ë¿Ú»ò×ÔÉíIPµØµã»á¼ûTMUI £¬¿ÉÖ´ÐÐí§ÒâϵͳÏÂÁî £¬½¨Éè»òɾ³ýÎļþ £¬»ò½ûÓ÷þÎñ¡£

¹Ù·½Í¨¸æÁ´½Ó£º

https://support.f5.com/csp/article/K45056101

 

TMM»º³åÇøÒç³öÎó²î£¨CVE-2021-22991£©£º

Á÷Á¿ÖÎÀí΢Äںˣ¨TMM£©URI¹æ·¶»¯¿ÉÄÜ»á¹ýʧµØ´¦Öóͷ£¶ÔÐéÄâ·þÎñÆ÷µÄÇëÇó £¬´Ó¶ø´¥·¢»º³åÇøÒç³ö £¬µ¼ÖÂDoS¹¥»÷¡£¹¥»÷Õßͨ¹ýÊý¾Ý²ãÃæ¾ÙÐÐʹÓà £¬ÔÚijЩÇéÐÎÏ £¬¿ÉÄÜÈÆ¹ý»ùÓÚURLµÄ»á¼û¿ØÖÆ»òʵÏÖÔ¶³Ì´úÂëÖ´ÐÐ £¬CVSSÆÀ·ÖΪ9.0¡£

¹Ù·½Í¨¸æÁ´½Ó£º

https://support.f5.com/csp/article/K56715231

 

Advanced WAF/ASM»º³åÇøÒç³öÎó²î£¨CVE-2021-22992£©£º

¶ÔÕ½ÂÔÖÐÉèÖÃÁË“µÇÂ¼Ò³Ãæ”µÄAdvanced WAF / BIG-IP ASMÐéÄâ·þÎñÆ÷µÄ¶ñÒâHTTPÏìÓ¦¿ÉÄܻᴥ·¢»º³åÇøÒç³ö £¬´Ó¶øµ¼ÖÂDoS¹¥»÷¡£¹¥»÷Õßͨ¹ýÊý¾Ý²ãÃæ¾ÙÐÐʹÓà £¬ÔÚijЩÇéÐÎÏ £¬¿ÉÄÜÔì³ÉÔ¶³Ì´úÂëÖ´ÐС£CVSSÆÀ·ÖΪ9.0¡£

¹Ù·½Í¨¸æÁ´½Ó£º

https://support.f5.com/csp/article/K52510511

Èý.  Ó°Ïì¹æÄ£

CVE-2021-22986£º

ÊÜÓ°Ïì°æ±¾

BIG-IP£º16.0.0-16.0.1

BIG-IP£º15.1.0-15.1.2

BIG-IP£º14.1.0-14.1.3.1

BIG-IP£º13.1.0-13.1.3.5

BIG-IP£º12.1.0-12.1.5.2

 

BIG-IQ£º7.1.0-7.1.0.2

BIG-IQ£º7.0.0-7.0.0.1

BIG-IQ£º6.0.0-6.1.0

²»ÊÜÓ°Ïì°æ±¾

BIG-IP£º16.0.1.1

BIG-IP£º15.1.2.1

BIG-IP£º14.1.4

BIG-IP£º13.1.3.6

BIG-IP£º12.1.5.3

 

BIG-IQ£º8.0.0

BIG-IQ£º7.1.0.3

BIG-IQ£º7.0.0.2

 

CVE-2021-22987/CVE-2021-22988/CVE-2021-22989/CVE-2021-22990/CVE-2021-22992£º

ÊÜÓ°Ïì°æ±¾

BIG-IP£º16.0.0-16.0.1

BIG-IP£º15.1.0-15.1.2

BIG-IP£º14.1.0-14.1.3.1

BIG-IP£º13.1.0-13.1.3.5

BIG-IP£º12.1.0-12.1.5.2

BIG-IP£º11.6.1-11.6.5.2

 

²»ÊÜÓ°Ïì°æ±¾

BIG-IP£º16.0.1.1

BIG-IP£º15.1.2.1

BIG-IP£º14.1.4

BIG-IP£º13.1.3.6

BIG-IP£º12.1.5.3

BIG-IP£º11.6.5.3

 

CVE-2021-22991£º

ÊÜÓ°Ïì°æ±¾

BIG-IP£º16.0.0-16.0.1

BIG-IP£º15.1.0-15.1.2

BIG-IP£º14.1.0-14.1.3.1

BIG-IP£º13.1.0-13.1.3.5

BIG-IP£º12.1.0-12.1.5.2

²»ÊÜÓ°Ïì°æ±¾

BIG-IP£º16.0.1.1

BIG-IP£º15.1.2.1

BIG-IP£º14.1.4

BIG-IP£º13.1.3.6

BIG-IP£º12.1.5.3

 

ËÄ.  Îó²î¼ì²â

4.1  °æ±¾¼ì²â

Ò»¡¢Óû§¿Éͨ¹ýÔÚTMOS shell£¨tmsh£©ÖÐÊäÈëÒÔÏÂÏÂÁî £¬Éó²éÄ¿½ñʹÓõİ汾£º

show sys version

 

AG¹«Ë¾(Öйú¼¯ÍÅ)¡¤ÓÐÏÞ¹«Ë¾¹ÙÍø

¶þ¡¢Óû§Ò²¿ÉµÇ¼WebÖÎÀí½çÃæÉó²éÄ¿½ñBIG-IPµÄ°æ±¾£º

 

Èô°æ±¾ÔÚÊÜÓ°Ïì¹æÄ£ÄÚ¼´±£´æÇ徲Σº¦¡£

AG¹«Ë¾(Öйú¼¯ÍÅ)¡¤ÓÐÏÞ¹«Ë¾¹ÙÍø

Îå.  Îó²î·À»¤

5.1  ¹Ù·½Éý¼¶

ÏÖÔÚF5¹Ù·½ÒÑÔÚ×îа汾ÖÐÐÞ¸´ÁËÒÔÉÏÎó²î £¬ÇëÊÜÓ°ÏìµÄÓû§¾¡¿ìÉý¼¶ÖÁ¶ÔÓ¦°æ±¾¾ÙÐзÀ»¤ £¬¹Ù·½ÏÂÔØÁ´½Ó£º

BIG-IP£ºhttps://support.f5.com/csp/article/K9502

BIG-IQ£ºhttps://support.f5.com/csp/article/K15113

Éý¼¶Ö¸ÄÏÓë×¢ÖØÊÂÏîÇë²ÎÔÄ:

BIG-IP£ºhttps://support.f5.com/csp/article/K13123

BIG-IQ£ºhttps://support.f5.com/csp/article/K15106

5.2  ÔÝʱ·À»¤²½·¥

ÈôÏà¹ØÓû§ÔÝʱÎÞ·¨¾ÙÐÐÉý¼¶²Ù×÷ £¬¿É½ÓÄÉÒÔϲ½·¥¾ÙÐлº½â¡£

CVE-2021-22986£º

եȡͨ¹ý×ÔÉíIPµØµã»á¼ûiControl REST£º½«ÏµÍ³ÖÐÿ¸öIPµØµãµÄPort LockdownÑ¡ÏîÉèÖÃΪAllow None¡£ ÈôÊDZØÐ迪·Åij¶Ë¿Ú £¬Ôò¿ªÆôAllow CustomÑ¡Ïî¡£ ĬÈÏÇéÐÎÏ £¬iControl REST¼àÌý443¶Ë¿Ú¡£

եȡͨ¹ýÖÎÀí½çÃæ»á¼ûiControl REST£º½ö½«ÖÎÆÊÎö¼ûȨÏÞ¿ª·Å¸øÊÜÐÅÍеÄÓû§ºÍF5×°±¸¡£

CVE-2021-22987/CVE-2021-22988/CVE-2021-22989/ CVE-2021-22989£º

եȡͨ¹ý×ÔÉíIPµØµã»á¼ûÉèÖÃÊÊÓóÌÐò£º½«ÏµÍ³ÉÏÿ¸öIPµØµãµÄPort LockdownÑ¡ÏîÉèÖøü¸ÄΪAllow None¡£ ÈôÊDZØÐ迪·Åij¶Ë¿Ú £¬Ôò¿ªÆôAllow CustomÑ¡ÏĬÈÏÇéÐÎÏ £¬ÉèÖÃÊÊÓóÌÐò¼àÌý443¶Ë¿Ú¡£

եȡͨ¹ýÖÎÀí½çÃæ»á¼ûÉèÖÃÊÊÓóÌÐò£º½ö½«ÖÎÆÊÎö¼ûȨÏÞ¿ª·Å¸øÊÜÐÅÍеÄÓû§ºÍF5×°±¸¡£

CVE-2021-22992£º

ʹÓÃiRule»º½â¶ñÒâÅþÁ¬£º

1. µÇ¼ÉèÖÃÊÊÓóÌÐò

2. ½øÈëLocal Traffic > iRules > iRule List

3. Ñ¡ÔñCreate

4. ÊäÈëiRuleµÄÃû³Æ

5. ÔÚDefinitionÖÐÌí¼ÓÒÔÏÂiRule´úÂ룺

 

 

The server response is invalid. Please inform the administrator. Error: K52510511

# Mitigation for K52510511: Advanced WAF/ASM Buffer Overflow vulnerability CVE-2021-22992

when RULE_INIT {

# Set static::debug 1 to enable debug logging.

    set static::debug 0

    set static::max_length 4000

}

when HTTP_REQUEST {

    if {$static::debug}{

        set LogString "Client [IP::client_addr]:[TCP::client_port] -> [HTTP::host][HTTP::uri]"

}

        set uri [string tolower [HTTP::uri]]

}

when HTTP_RESPONSE {

    set header_names [HTTP::header names]

    set combined_header_name [join $header_names ""]

    set combined_header_name_len [string length $combined_header_name]

    if {$static::debug}{

        log local0. "=================response======================"

        log local0. "$LogString (response)"

        log local0. "combined header names: $combined_header_name"

        foreach aHeader [HTTP::header names] {

        log local0. "$aHeader: [HTTP::header value $aHeader]"

}

        log local0. "the length of the combined response header names: $combined_header_name_len"

        log local0. "============================================="

}

    if { ( $combined_header_name_len > $static::max_length ) } {

        log local0. "In the response of '$uri', the length of the combined header names $combined_header_name_len exceeds the maximum value $static::max_length. See K52510511: Advanced WAF/ASM Buffer Overflow vulnerability CVE-2021-22992"

HTTP::respond 502 content "

"

 

}

}

6. Ñ¡ÔñFinished

7. ½«iRuleÓëÊÜÓ°ÏìµÄÐéÄâ·þÎñÆ÷Ïà¹ØÁª

Ð޸ĵǼ½çÃæÉèÖãº

1. µÇ¼µ½ÊÜÓ°ÏìµÄAdvanced WAF/ASMϵͳµÄÉèÖÃÊÊÓóÌÐò

2. ½øÈëSecurity > Application Security > Sessions and Logins > Login Pages List

3. ´ÓCurrent edited policy listÖÐÑ¡ÔñÇå¾²Õ½ÂÔ

4. ´ÓÕâÁ½¸öÉèÖÃÖÐɾ³ýËùÓÐÉèÖÃ

5. Ñ¡ÔñÉúÑÄÒÔÉúÑĸü¸Ä

6. Ñ¡ÔñApply Policy £¬Ó¦Óøü¸Ä

7. Ñ¡ÔñOKÒÔÈ·ÈϲÙ×÷

ɾ³ýÉϰ¶Ò³Ã棺

1. µÇ¼µ½ÊÜÓ°ÏìµÄBIG-IP Advanced WAF/ASMϵͳµÄÉèÖÃÊÊÓóÌÐò

2. ½øÈëSecurity > Application Security > Sessions and Logins > Login Pages List

3. ´ÓCurrent edited policy listÖÐÑ¡ÔñÇå¾²Õ½ÂÔ

4. ѡժҪɾ³ýµÄµÇÂ¼Ò³ÃæÉèÖÃ

5. Ñ¡ÔñDelete

6. Ñ¡ÔñOKÈ·ÈÑþ³Øý

7. Ñ¡ÔñApply Policy £¬Ó¦Óøü¸Ä

8. Ñ¡ÔñOKÈ·ÈϲÙ×÷

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