http://blog.checkpoint.com/2016/12/27/check-point-discovers-three-zero-day-vulnerabilities-web-programming-language-php-7

http://blog.checkpoint.com/wp-content/uploads/2016/12/PHP_Technical_Report.pdf

http://php.net/ChangeLog-7.php

95152

https://bugs.php.net/bug.php?id=73257

https://github.com/php/php-src/commit/61cdd1255d5b9c8453be71aacbbf682796ac77d4

https://security.netapp.com/advisory/ntap-20180112-0001/

https://www.youtube.com/watch?v=LDcaPstAuPk

This update for php7 fixes the following security issues :

  - CVE-2016-7480: The SplObjectStorage unserialize     implementation in ext/spl/spl_observer.c in PHP did not     verify that a key is an object, which allowed remote     attackers to execute arbitrary code or cause a denial of     service (uninitialized memory access) via crafted     serialized data. (bsc#1019568)

  - CVE-2017-5340: Zend/zend_hash.c in PHP mishandled     certain cases that require large array allocations,     which allowed remote attackers to execute arbitrary code     or cause a denial of service (integer overflow,     uninitialized memory access, and use of arbitrary     destructor function pointers) via crafted serialized     data. (bsc#1019570)

  - CVE-2016-7479: In all versions of PHP 7, during the     unserialization process, resizing the 'properties' hash     table of a serialized object may have lead to     use-after-free. A remote attacker may exploit this bug     to gain arbitrary code execution. (bsc#1019547)

  - CVE-2016-7478: Zend/zend_exceptions.c in PHP allowed     remote attackers to cause a denial of service (infinite     loop) via a crafted Exception object in serialized data,     a related issue to CVE-2015-8876. (bsc#1019550)

  - CVE-2016-10159: Integer overflow in the     phar_parse_pharfile function in ext/phar/phar.c in PHP     allowed remote attackers to cause a denial of service     (memory consumption or application crash) via a     truncated manifest entry in a PHAR archive.
    (bsc#1022255)

  - CVE-2016-10160: Off-by-one error in the     phar_parse_pharfile function in ext/phar/phar.c in PHP     allowed remote attackers to cause a denial of service     (memory corruption) or possibly execute arbitrary code     via a crafted PHAR archive with an alias mismatch.
    (bsc#1022257)

  - CVE-2016-10161: The object_common1 function in     ext/standard/var_unserializer.c in PHP allowed remote     attackers to cause a denial of service (buffer over-read     and application crash) via crafted serialized data that     is mishandled in a finish_nested_data call.
    (bsc#1022260)

  - CVE-2016-10162: The php_wddx_pop_element function in     ext/wddx/wddx.c in PHP 7 allowed remote attackers to     cause a denial of service (NULL pointer dereference and     application crash) via an inapplicable class name in a     wddxPacket XML document, leading to mishandling in a     wddx_deserialize call. (bsc#1022262)

  - CVE-2016-10166: A potential unsigned underflow in gd     interpolation functions could lead to memory corruption     in the PHP gd module (bsc#1022263)

  - CVE-2016-10167: A denial of service problem in     gdImageCreateFromGd2Ctx() could lead to php out of     memory even on small files. (bsc#1022264)

  - CVE-2016-10168: A signed integer overflow in the gd     module could lead to memory corruption (bsc#1022265)

  - CVE-2016-9138: PHP mishandled property modification     during __wakeup processing, which allows remote     attackers to cause a denial of service or possibly have     unspecified other impact via crafted serialized data, as     demonstrated by Exception::__toString with     DateInterval::__wakeup. (bsc#1008026)

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

This update for php7 fixes the following security issues :

  - CVE-2016-7480: The SplObjectStorage unserialize     implementation in ext/spl/spl_observer.c in PHP did not     verify that a key is an object, which allowed remote     attackers to execute arbitrary code or cause a denial of     service (uninitialized memory access) via crafted     serialized data. (bsc#1019568)

  - CVE-2017-5340: Zend/zend_hash.c in PHP mishandled     certain cases that require large array allocations,     which allowed remote attackers to execute arbitrary code     or cause a denial of service (integer overflow,     uninitialized memory access, and use of arbitrary     destructor function pointers) via crafted serialized     data. (bsc#1019570)

  - CVE-2016-7479: In all versions of PHP 7, during the     unserialization process, resizing the 'properties' hash     table of a serialized object may have lead to     use-after-free. A remote attacker may exploit this bug     to gain arbitrary code execution. (bsc#1019547)

  - CVE-2016-7478: Zend/zend_exceptions.c in PHP allowed     remote attackers to cause a denial of service (infinite     loop) via a crafted Exception object in serialized data,     a related issue to CVE-2015-8876. (bsc#1019550)

  - CVE-2016-10159: Integer overflow in the     phar_parse_pharfile function in ext/phar/phar.c in PHP     allowed remote attackers to cause a denial of service     (memory consumption or application crash) via a     truncated manifest entry in a PHAR archive.
    (bsc#1022255)

  - CVE-2016-10160: Off-by-one error in the     phar_parse_pharfile function in ext/phar/phar.c in PHP     allowed remote attackers to cause a denial of service     (memory corruption) or possibly execute arbitrary code     via a crafted PHAR archive with an alias mismatch.
    (bsc#1022257)

  - CVE-2016-10161: The object_common1 function in     ext/standard/var_unserializer.c in PHP allowed remote     attackers to cause a denial of service (buffer over-read     and application crash) via crafted serialized data that     is mishandled in a finish_nested_data call.
    (bsc#1022260)

  - CVE-2016-10162: The php_wddx_pop_element function in     ext/wddx/wddx.c in PHP 7 allowed remote attackers to     cause a denial of service (NULL pointer dereference and     application crash) via an inapplicable class name in a     wddxPacket XML document, leading to mishandling in a     wddx_deserialize call. (bsc#1022262)

  - CVE-2016-10166: A potential unsigned underflow in gd     interpolation functions could lead to memory corruption     in the PHP gd module (bsc#1022263)

  - CVE-2016-10167: A denial of service problem in     gdImageCreateFromGd2Ctx() could lead to php out of     memory even on small files. (bsc#1022264)

  - CVE-2016-10168: A signed integer overflow in the gd     module could lead to memory corruption (bsc#1022265)

  - CVE-2016-9138: PHP mishandled property modification     during __wakeup processing, which allows remote     attackers to cause a denial of service or possibly have     unspecified other impact via crafted serialized data, as     demonstrated by Exception::__toString with     DateInterval::__wakeup. (bsc#1008026)

This update was imported from the SUSE:SLE-12:Update update project.

The SplObjectStorage unserialize implementation in ext/spl/spl_observer.c in PHP before 7.0.12 does not verify that a key is an object, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized memory access) via crafted serialized data. (CVE-2016-7480)

Use-after-free vulnerability in the CURLFile implementation in ext/curl/curl_file.c in PHP 7.x before 7.0.12 allows remote attackers to cause a denial of service or possibly have unspecified other impact via crafted serialized data that is mishandled during __wakeup processing. (CVE-2016-9137)

Stack consumption vulnerability in the gdImageFillToBorder function in gd.c in the GD Graphics Library (aka libgd) before 2.2.2, as used in PHP 7.x before 7.0.13, allows remote attackers to cause a denial of service (segmentation violation) via a crafted imagefilltoborder call that triggers use of a negative color value. (CVE-2016-9933)

ext/wddx/wddx.c in PHP 7.x before 7.0.13 allows remote attackers to cause a denial of service (NULL pointer dereference) via crafted serialized data in a wddxPacket XML document, as demonstrated by a PDORow string. (CVE-2016-9934)

The php_wddx_push_element function in ext/wddx/wddx.c in PHP 7.x before 7.0.14 allows remote attackers to cause a denial of service (out-of-bounds read and memory corruption) or possibly have unspecified other impact via an empty boolean element in a wddxPacket XML document. (CVE-2016-9935)

The unserialize implementation in ext/standard/var.c in PHP 7.x before 7.0.14 allows remote attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact via crafted serialized data. This vulnerability exists because of an incomplete fix for CVE-2015-6834 . (CVE-2016-9936)

Check Point reports :

... discovered 3 fresh and previously unknown vulnerabilities (CVE-2016-7479, CVE-2016-7480, CVE-2016-7478) in the PHP 7 unserialize mechanism.

The first two vulnerabilities allow attackers to take full control over servers, allowing them to do anything they want with the website, from spreading malware to defacing it or stealing customer data.

The last vulnerability generates a Denial of Service attack which basically hangs the website, exhausts its memory consumption, and shuts it down.

The PHP security team issued fixes for two of the vulnerabilities on the 13th of October and 1st of December.

ID	Name	Product	Family	Severity
132184	EulerOS 2.0 SP3 : php (EulerOS-SA-2019-2649)	Nessus	Huawei Local Security Checks	critical
131592	EulerOS 2.0 SP2 : php (EulerOS-SA-2019-2438)	Nessus	Huawei Local Security Checks	critical
119993	SUSE SLES12 Security Update : php7 (SUSE-SU-2017:0534-1)	Nessus	SuSE Local Security Checks	high
97563	openSUSE Security Update : php7 (openSUSE-2017-304)	Nessus	SuSE Local Security Checks	high
96806	Amazon Linux AMI : php70 (ALAS-2017-788)	Nessus	Amazon Linux Local Security Checks	high
96292	FreeBSD : PHP -- multiple vulnerabilities (1b61ecef-cdb9-11e6-a9a5-b499baebfeaf)	Nessus	FreeBSD Local Security Checks	high

CVE-2016-7480

HIGH

Description

References

Details

Risk Information

CVSS v2.0

CVSS v3.0

Vulnerable Software

Configuration 1

Tenable Plugins

critical

critical

high

high

high

high