ext/standard/var_unserializer.re in PHP 7.0.x before 7.0.21 and 7.1.x before 7.1.7 is prone to a heap use after free while unserializing untrusted data, related to the zval_get_type function in Zend/zend_types.h. Exploitation of this issue can have an unspecified impact on the integrity of PHP.

The remote Redhat Enterprise Linux 6 / 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:1296 advisory.

    PHP is an HTML-embedded scripting language commonly used with the Apache HTTP Server.

    The following packages have been upgraded to a later upstream version: rh-php70-php (7.0.27). (BZ#1518843)

    Security Fix(es):

    * php: Heap overflow in mysqlnd when not receiving UNSIGNED_FLAG in BIT field (CVE-2016-7412)

    * php: Use after free in wddx_deserialize (CVE-2016-7413)

    * php: Out of bounds heap read when verifying signature of zip phar in phar_parse_zipfile (CVE-2016-7414)

    * php: Stack based buffer overflow in msgfmt_format_message (CVE-2016-7416)

    * php: Missing type check when unserializing SplArray (CVE-2016-7417)

    * php: Null pointer dereference in php_wddx_push_element (CVE-2016-7418)

    * php: Use-after-free vulnerability when resizing the 'properties' hash table of a serialized object     (CVE-2016-7479)

    * php: Invalid read when wddx decodes empty boolean element (CVE-2016-9935)

    * php: Use After Free in unserialize() (CVE-2016-9936)

    * php: Wrong calculation in exif_convert_any_to_int function (CVE-2016-10158)

    * php: Integer overflow in phar_parse_pharfile (CVE-2016-10159)

    * php: Off-by-one error in phar_parse_pharfile when loading crafted phar archive (CVE-2016-10160)

    * php: Out-of-bounds heap read on unserialize in finish_nested_data() (CVE-2016-10161)

    * php: Null pointer dereference when unserializing PHP object (CVE-2016-10162)

    * gd: DoS vulnerability in gdImageCreateFromGd2Ctx() (CVE-2016-10167)

    * gd: Integer overflow in gd_io.c (CVE-2016-10168)

    * php: Use of uninitialized memory in unserialize() (CVE-2017-5340)

    * php: Buffer over-read from unitialized data in gdImageCreateFromGifCtx function (CVE-2017-7890)

    * oniguruma: Out-of-bounds stack read in match_at() during regular expression searching (CVE-2017-9224)

    * oniguruma: Heap buffer overflow in next_state_val() during regular expression compilation     (CVE-2017-9226)

    * oniguruma: Out-of-bounds stack read in mbc_enc_len() during regular expression searching (CVE-2017-9227)

    * oniguruma: Out-of-bounds heap write in bitset_set_range() (CVE-2017-9228)

    * oniguruma: Invalid pointer dereference in left_adjust_char_head() (CVE-2017-9229)

    * php: Incorrect WDDX deserialization of boolean parameters leads to DoS (CVE-2017-11143)

    * php: Incorrect return value check of OpenSSL sealing function leads to crash (CVE-2017-11144)

    * php: Out-of-bounds read in phar_parse_pharfile (CVE-2017-11147)

    * php: Stack-based buffer over-read in msgfmt_parse_message function (CVE-2017-11362)

    * php: Stack based 1-byte buffer over-write in zend_ini_do_op() function Zend/zend_ini_parser.c     (CVE-2017-11628)

    * php: heap use after free in ext/standard/var_unserializer.re (CVE-2017-12932)

    * php: heap use after free in ext/standard/var_unserializer.re (CVE-2017-12934)

    * php: reflected XSS in .phar 404 page (CVE-2018-5712)

    * php, gd: Stack overflow in gdImageFillToBorder on truecolor images (CVE-2016-9933)

    * php: NULL Pointer Dereference in WDDX Packet Deserialization with PDORow (CVE-2016-9934)

    * php: wddx_deserialize() heap out-of-bound read via php_parse_date() (CVE-2017-11145)

    * php: buffer over-read in finish_nested_data function (CVE-2017-12933)

    * php: Out-of-bound read in timelib_meridian() (CVE-2017-16642)

    * php: Denial of Service (DoS) via infinite loop in libgd gdImageCreateFromGifCtx function in     ext/gd/libgd/gd_gif_in.c (CVE-2018-5711)

    For more details about the security issue(s), including the impact, a CVSS score, and other related     information, refer to the CVE page(s) listed in the References section.

    Additional Changes:

    For details, see the Red Hat Software Collections 3.1 Release Notes linked from the References section.

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.

According to its banner, the version of PHP running on the remote web server is 7.1.x prior to 7.1.7. It is, therefore, affected by the following vulnerabilities :

 - An out-of-bounds read error exists in the GD Graphics Library (LibGD) in the gdImageCreateFromGifCtx() function within file gd_gif_in.c when handling a specially crafted GIF file. An unauthenticated, remote attacker can exploit this to disclose sensitive memory contents or crash a process linked to the library. (CVE-2017-7890)

 - An out-of-bounds read error exists in Oniguruma in the match_at() function within file regexec.c. An unauthenticated, remote attacker can exploit this to disclose sensitive memory contents or crash a process linked to the library. (CVE-2017-9224)

 - An out-of-bounds write error exists in Oniguruma in the next_state_val() function during regular expression compilation. An unauthenticated, remote attacker can exploit this to execute arbitrary code. (CVE-2017-9226)

 - An out-of-bounds read error exists in Oniguruma in the mbc_enc_len() function within file utf8.c. An unauthenticated, remote attacker can exploit this to disclose memory contents or crash a process linked to the library. (CVE-2017-9227)

 - An out-of-bounds write error exists in Oniguruma in the bitset_set_range() function during regular expression compilation. An unauthenticated, remote attacker can exploit this to execute arbitrary code. (CVE-2017-9228)

 - An invalid pointer deference flaw exists in Oniguruma in the left_adjust_char_head() function within file regexec.c during regular expression compilation. An unauthenticated, remote attacker can exploit this to crash a process linked to the library, resulting in a denial of service condition. (CVE-2017-9229)

 - A flaw exists in OpenSSL in the EVP_SealInit() function within file crypto/evp/p_seal.c due to returning an undocumented value of '-1'. An unauthenticated, remote attacker can exploit this to cause an unspecified impact. (CVE-2017-11144)

 - An out-of-bounds read error exists in PHP in the php_parse_date() function within file ext/date/lib/parse_date.c. An unauthenticated, remote attacker can exploit this to disclose memory contents or cause a denial of service condition. (CVE-2017-11145)

 - A use-after-free error exists in PHP in the zval_get_type() function within file ext/standard/var_unserializer.c. An unauthenticated, remote attacker can exploit this to execute arbitrary code. (CVE-2017-12934)

 - An out-of-bounds read error exists in PHP in the finish_nested_data() function within file ext/standard/var_unserializer.re. An unauthenticated, remote attacker can exploit this to disclose memory contents or cause a denial of service condition. (CVE-2017-12933)

 - An off-by-one overflow condition exists in PHP in the INI parsing API, specifically in the zend_ini_do_op() function within file Zend/zend_ini_parser.y, due to improper validation of user-supplied input. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-11628)

 - A stack-based buffer overflow condition exists in PHP in the msgfmt_parse_message() function due to improper validation of user-supplied input when parsing locale. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-11362)

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

According to its banner, the version of PHP running on the remote web server is 7.0.x prior to 7.0.21. It is, therefore, affected by the following vulnerabilities :

 - An out-of-bounds read error exists in the PCRE library in the compile_bracket_matchingpath() function within file pcre_jit_compile.c. An unauthenticated, remote attacker can exploit this, via a specially crafted regular expression, to crash a process linked to the library, resulting in a denial of service condition. (CVE-2017-6004)

 - An out-of-bounds read error exists in the GD Graphics Library (LibGD) in the gdImageCreateFromGifCtx() function within file gd_gif_in.c when handling a specially crafted GIF file. An unauthenticated, remote attacker can exploit this to disclose sensitive memory contents or crash a process linked to the library. (CVE-2017-7890)

 - An out-of-bounds read error exists in Oniguruma in the match_at() function within file regexec.c. An unauthenticated, remote attacker can exploit this to disclose sensitive memory contents or crash a process linked to the library. (CVE-2017-9224)

 - An out-of-bounds write error exists in Oniguruma in the next_state_val() function during regular expression compilation. An unauthenticated, remote attacker can exploit this to execute arbitrary code. (CVE-2017-9226)

 - An out-of-bounds read error exists in Oniguruma in the mbc_enc_len() function within file utf8.c. An unauthenticated, remote attacker can exploit this to disclose memory contents or crash a process linked to the library. (CVE-2017-9227)

 - An out-of-bounds write error exists in Oniguruma in the bitset_set_range() function during regular expression compilation. An unauthenticated, remote attacker can exploit this to execute arbitrary code. (CVE-2017-9228)

 - An invalid pointer deference flaw exists in Oniguruma in the left_adjust_char_head() function within file regexec.c during regular expression compilation. An unauthenticated, remote attacker can exploit this to crash a process linked to the library, resulting in a denial of service condition. (CVE-2017-9229)

 - A flaw exists in OpenSSL in the EVP_SealInit() function within file crypto/evp/p_seal.c due to returning an undocumented value of '-1'. An unauthenticated, remote attacker can exploit this to cause an unspecified impact. (CVE-2017-11144)

 - An out-of-bounds read error exists in PHP in the php_parse_date() function within file ext/date/lib/parse_date.c. An unauthenticated, remote attacker can exploit this to disclose memory contents or cause a denial of service condition. (CVE-2017-11145)

 - A use-after-free error exists in PHP in the zval_get_type() function within file ext/standard/var_unserializer.c. An unauthenticated, remote attacker can exploit this to execute arbitrary code.

 - An out-of-bounds read error exists in PHP in the finish_nested_data() function within file ext/standard/var_unserializer.re. An unauthenticated, remote attacker can exploit this to disclose memory contents or cause a denial of service condition.

 - An off-by-one overflow condition exists in PHP in the INI parsing API, specifically in the zend_ini_do_op() function within file Zend/zend_ini_parser.y, due to improper validation of user-supplied input. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or the execution of arbitrary code.

 - A stack-based buffer overflow condition exists in PHP in the msgfmt_parse_message() function due to improper validation of user-supplied input when parsing locale. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or the execution of arbitrary code.

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

This update for php7 fixes several issues. These security issues were fixed :

  - CVE-2017-12932: Prevent heap use after free while     unserializing untrusted data, related to improper use of     the hash API for key deletion in a situation with an     invalid array size. Exploitation of this issue could     have had an unspecified impact on the integrity of PHP     (bsc#1054432).

  - CVE-2017-12934: Prevent heap use after free while     unserializing untrusted data, related to the     zval_get_type function in Zend/zend_types.h.
    Exploitation of this issue could have had an unspecified     impact on the integrity of PHP (bsc#1054408).

  - CVE-2017-12933: The finish_nested_data function in     ext/standard/var_unserializer.re was prone to a buffer     over-read while unserializing untrusted data.
    Exploitation of this issue could have had an unspecified     impact on the integrity of PHP (bsc#1054430)

The update package also includes non-security fixes. See advisory for details.

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.

Several vulnerabilities were found in PHP, a widely-used open source general purpose scripting language :

  - CVE-2017-11144     Denial of service in openssl extension due to incorrect     return value check of OpenSSL sealing function

  - CVE-2017-11145     Out-of-bounds read in wddx_deserialize()

  - CVE-2017-11628     Buffer overflow in PHP INI parsing API

  - CVE-2017-12932 / CVE-2017-12934     Use-after-frees during unserialisation

  - CVE-2017-12933     Buffer overread in finish_nested_data()

  - CVE-2017-16642     Out-of-bounds read in timelib_meridian()

This update for php7 fixes several issues.

These security issues were fixed :

  - CVE-2017-12932: Prevent heap use after free while     unserializing untrusted data, related to improper use of     the hash API for key deletion in a situation with an     invalid array size. Exploitation of this issue could     have had an unspecified impact on the integrity of PHP     (bsc#1054432).

  - CVE-2017-12934: Prevent heap use after free while     unserializing untrusted data, related to the     zval_get_type function in Zend/zend_types.h.
    Exploitation of this issue could have had an unspecified     impact on the integrity of PHP (bsc#1054408).

  - CVE-2017-12933: The finish_nested_data function in     ext/standard/var_unserializer.re was prone to a buffer     over-read while unserializing untrusted data.
    Exploitation of this issue could have had an unspecified     impact on the integrity of PHP (bsc#1054430)

These non-security issues were fixed :

  - bsc#1057104: php7-devel now requires php7-pear

  - bsc#1057845: Fixed namespace encapsulation of imported     classes/functions/constants

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

According to its banner, the version of PHP running on the remote web server is 7.1.x prior to 7.1.7. It is, therefore, affected by the following vulnerabilities :

  - An out-of-bounds read error exists in the GD Graphics     Library (LibGD) in the gdImageCreateFromGifCtx()     function within file gd_gif_in.c when handling a     specially crafted GIF file. An unauthenticated, remote     attacker can exploit this to disclose sensitive memory     contents or crash a process linked to the library.
    (CVE-2017-7890)

  - An out-of-bounds read error exists in Oniguruma in the     match_at() function within file regexec.c. An     unauthenticated, remote attacker can exploit this to     disclose sensitive memory contents or crash a process     linked to the library. (CVE-2017-9224)

  - An out-of-bounds write error exists in Oniguruma in the     next_state_val() function during regular expression     compilation. An unauthenticated, remote attacker can     exploit this to execute arbitrary code. (CVE-2017-9226)

  - An out-of-bounds read error exists in Oniguruma in the     mbc_enc_len() function within file utf8.c. An     unauthenticated, remote attacker can exploit this to     disclose memory contents or crash a process linked to     the library. (CVE-2017-9227)

  - An out-of-bounds write error exists in Oniguruma in the     bitset_set_range() function during regular expression     compilation. An unauthenticated, remote attacker can     exploit this to execute arbitrary code. (CVE-2017-9228)

  - An invalid pointer deference flaw exists in Oniguruma     in the left_adjust_char_head() function within file     regexec.c during regular expression compilation. An     unauthenticated, remote attacker can exploit this to     crash a process linked to the library, resulting in a     denial of service condition. (CVE-2017-9229)

  - A flaw exists in OpenSSL in the EVP_SealInit() function     within file crypto/evp/p_seal.c due to returning an     undocumented value of '-1'. An unauthenticated, remote     attacker can exploit this to cause an unspecified     impact. (CVE-2017-11144)

  - An out-of-bounds read error exists in PHP in the     php_parse_date() function within file     ext/date/lib/parse_date.c. An unauthenticated, remote     attacker can exploit this to disclose memory contents or     cause a denial of service condition. (CVE-2017-11145)

  - A stack-based buffer overflow condition exists in PHP     in the msgfmt_parse_message() function due to improper     validation of user-supplied input when parsing locale.
    An unauthenticated, remote attacker can exploit this to     cause a denial of service condition or the execution of     arbitrary code. (CVE-2017-11362)

  - An off-by-one overflow condition exists in PHP in the     INI parsing API, specifically in the zend_ini_do_op()     function within file Zend/zend_ini_parser.c, due to     improper validation of user-supplied input. An     unauthenticated, remote attacker can exploit this to     cause a denial of service condition or the execution of     arbitrary code. (CVE-2017-11628)

  - An out-of-bounds read error exists in PHP in the     finish_nested_data() function within file     ext/standard/var_unserializer.re. An unauthenticated,     remote attacker can exploit this to disclose memory     contents or cause a denial of service condition.
    (CVE-2017-12933)

  - A use-after-free error exists in PHP in the     zval_get_type() function within file     ext/standard/var_unserializer.c. An unauthenticated,     remote attacker can exploit this to execute arbitrary     code. (CVE-2017-12934)

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

According to its banner, the version of PHP running on the remote web server is 7.0.x prior to 7.0.21. It is, therefore, affected by the following vulnerabilities :

  - An out-of-bounds read error exists in the PCRE library     in the compile_bracket_matchingpath() function within     file pcre_jit_compile.c. An unauthenticated, remote     attacker can exploit this, via a specially crafted     regular expression, to crash a process linked to the     library, resulting in a denial of service condition.
    (CVE-2017-6004)

  - An out-of-bounds read error exists in the GD Graphics     Library (LibGD) in the gdImageCreateFromGifCtx()     function within file gd_gif_in.c when handling a     specially crafted GIF file. An unauthenticated, remote     attacker can exploit this to disclose sensitive memory     contents or crash a process linked to the library.
    (CVE-2017-7890)

  - An out-of-bounds read error exists in Oniguruma in the     match_at() function within file regexec.c. An     unauthenticated, remote attacker can exploit this to     disclose sensitive memory contents or crash a process     linked to the library. (CVE-2017-9224)

  - An out-of-bounds write error exists in Oniguruma in the     next_state_val() function during regular expression     compilation. An unauthenticated, remote attacker can     exploit this to execute arbitrary code. (CVE-2017-9226)

  - An out-of-bounds read error exists in Oniguruma in the     mbc_enc_len() function within file utf8.c. An     unauthenticated, remote attacker can exploit this to     disclose memory contents or crash a process linked to     the library. (CVE-2017-9227)

  - An out-of-bounds write error exists in Oniguruma in the     bitset_set_range() function during regular expression     compilation. An unauthenticated, remote attacker can     exploit this to execute arbitrary code. (CVE-2017-9228)

  - An invalid pointer deference flaw exists in Oniguruma     in the left_adjust_char_head() function within file     regexec.c during regular expression compilation. An     unauthenticated, remote attacker can exploit this to     crash a process linked to the library, resulting in a     denial of service condition. (CVE-2017-9229)

  - A flaw exists in OpenSSL in the EVP_SealInit() function     within file crypto/evp/p_seal.c due to returning an     undocumented value of '-1'. An unauthenticated, remote     attacker can exploit this to cause an unspecified     impact. (CVE-2017-11144)

  - An out-of-bounds read error exists in PHP in the     php_parse_date() function within file     ext/date/lib/parse_date.c. An unauthenticated, remote     attacker can exploit this to disclose memory contents or     cause a denial of service condition. (CVE-2017-11145)

  - A stack-based buffer overflow condition exists in PHP     in the msgfmt_parse_message() function due to improper     validation of user-supplied input when parsing locale.
    An unauthenticated, remote attacker can exploit this to     cause a denial of service condition or the execution of     arbitrary code. (CVE-2017-11362)

  - An off-by-one overflow condition exists in PHP in the     INI parsing API, specifically in the zend_ini_do_op()     function within file Zend/zend_ini_parser.c, due to     improper validation of user-supplied input. An     unauthenticated, remote attacker can exploit this to     cause a denial of service condition or the execution of     arbitrary code. (CVE-2017-11628)

  - An out-of-bounds read error exists in PHP in the     finish_nested_data() function within file     ext/standard/var_unserializer.re. An unauthenticated,     remote attacker can exploit this to disclose memory     contents or cause a denial of service condition.
    (CVE-2017-12933)

  - A use-after-free error exists in PHP in the     zval_get_type() function within file     ext/standard/var_unserializer.c. An unauthenticated,     remote attacker can exploit this to execute arbitrary     code. (CVE-2017-12934)

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

ID	Name	Product	Family	Severity
194027	RHEL 6 / 7 : rh-php70-php (RHSA-2018:1296)	Nessus	Red Hat Local Security Checks	critical
98864	PHP 7.1.x < 7.1.7 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	critical
98844	PHP 7.0.x < 7.0.21 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	critical
120006	SUSE SLES12 Security Update : php7 (SUSE-SU-2017:2468-1)	Nessus	SuSE Local Security Checks	critical
105663	Debian DSA-4080-1 : php7.0 - security update	Nessus	Debian Local Security Checks	critical
103286	openSUSE Security Update : php7 (openSUSE-2017-1061)	Nessus	SuSE Local Security Checks	critical
101527	PHP 7.1.x < 7.1.7 Multiple Vulnerabilities	Nessus	CGI abuses	critical
101526	PHP 7.0.x < 7.0.21 Multiple Vulnerabilities	Nessus	CGI abuses	critical

Detections

Analytics

CVE-2017-12934

high

Tenable Plugins

critical

critical

critical

critical

critical

critical

critical

critical