Bugzilla – Bug 949961
VUL-1: CVE-2015-7803: php5,php53: Null pointer dereference in phar_get_fp_offset()
Last modified: 2016-08-01 08:43:34 UTC
https://bugs.php.net/bug.php?id=69720 Description: ------------ If a Tar entry has the Link indicator set and points to an nonexisting file, phar_get_link_source() returns a NULL value phar/util.c:69: if (SUCCESS == zend_hash_find(&(entry->phar->manifest), entry->link, strlen(entry->link), (void **)&link_entry) || SUCCESS == zend_hash_find(&(entry->phar->manifest), link, strlen(link), (void **)&link_entry)) { ....... }else { ....... return NULL; } The NULL value gets passed into phar_get_fp_offset() at util.c:497: (*ret)->zero = phar_get_fp_offset(phar_get_link_source(entry TSRMLS_CC) TSRMLS_CC); The NULL pointer dereference occurs in phar_internal.h:444 where entry is NULL : if (!entry->is_persistent) This causes PHP to seg fault. Proof Of Concept: ./php readphar.php Null_ptr_deref_in_phar_get_fp_offset.tar.phar Segmentation fault POC can be found here: https://www.dropbox.com/s/6hks64dopgcco9f/POC_Null_ptr_deref_in_phar_get_fp_offset.zip?dl=0 References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-7803 http://seclists.org/oss-sec/2015/q4/58 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7803
master commit: 2cacf5770daa13b0c498f48d1f7b20b6585a70bf Backport commit: d698f0ae51f67c9cce870b09c59df3d6ba959244 Note the difference in the commits. Fixed in tags: php-5.5.30 php-7.0.0RC4
Created attachment 651183 [details] testcase phar
# zypper in php5-phar $ cat bug69720.php <?php try { // open an existing phar $p = new Phar(__DIR__."/bug69720.phar",0); // Phar extends SPL's DirectoryIterator class echo $p->getMetadata(); foreach (new RecursiveIteratorIterator($p) as $file) { // $file is a PharFileInfo class, and inherits from SplFileInfo $temp=""; $temp= $file->getFileName() . "\n"; $temp.=file_get_contents($file->getPathName()) . "\n"; // display contents var_dump($file->getMetadata()); } } catch (Exception $e) { echo 'Could not open Phar: ', $e; } ?> BEFORE $ php bug69720.php MY_METADATA_NULL Segmentation fault (core dumped) $ AFTER $ php bug69720.php MY_METADATA_NULL PHP Warning: file_get_contents(phar:///949961/bug69720.phar/test.php): failed to open stream: phar error: "test.php" is not a file in phar "/949961/bug69720.phar" in /949961/bug69720.php on line 11 array(1) { ["whatever"]=> int(123) } object(DateTime)#2 (3) { ["date"]=> string(26) "2000-01-01 00:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } $
bugbot adjusting priority
Submitted for sle12 (-> 42.1) and 13.2. 11sp3 and 13.1 remains.
This is an autogenerated message for OBS integration: This bug (949961) was mentioned in https://build.opensuse.org/request/show/354582 13.2 / php5
openSUSE-SU-2016:0251-1: An update that fixes three vulnerabilities is now available. Category: security (moderate) Bug References: 949961,949962,962057 CVE References: CVE-2015-7803,CVE-2015-7804,CVE-2016-1903 Sources used: openSUSE 13.2 (src): php5-5.6.1-39.1
SUSE-SU-2016:0284-1: An update that fixes two vulnerabilities is now available. Category: security (moderate) Bug References: 949961,962057 CVE References: CVE-2015-7803,CVE-2016-1903 Sources used: SUSE Linux Enterprise Software Development Kit 12-SP1 (src): php5-5.5.14-42.2 SUSE Linux Enterprise Software Development Kit 12 (src): php5-5.5.14-42.2 SUSE Linux Enterprise Module for Web Scripting 12 (src): php5-5.5.14-42.2
openSUSE-SU-2016:0366-1: An update that fixes two vulnerabilities is now available. Category: security (moderate) Bug References: 949961,962057 CVE References: CVE-2015-7803,CVE-2016-1903 Sources used: openSUSE Leap 42.1 (src): php5-5.5.14-41.1
Package submitted into 11sp3.
SUSE-SU-2016:1145-1: An update that fixes 8 vulnerabilities is now available. Category: security (important) Bug References: 949961,968284,969821,971611,971612,971912,973351,973792 CVE References: CVE-2014-9767,CVE-2015-7803,CVE-2015-8835,CVE-2015-8838,CVE-2016-2554,CVE-2016-3141,CVE-2016-3142,CVE-2016-3185 Sources used: SUSE Linux Enterprise Software Development Kit 11-SP4 (src): php53-5.3.17-59.1 SUSE Linux Enterprise Server 11-SP4 (src): php53-5.3.17-59.1 SUSE Linux Enterprise Debuginfo 11-SP4 (src): php53-5.3.17-59.1
SUSE-SU-2016:1581-1: An update that fixes 31 vulnerabilities is now available. Category: security (important) Bug References: 949961,968284,969821,971611,971612,971912,973351,973792,976996,976997,977003,977005,977991,977994,978827,978828,978829,978830,980366,980373,980375,981050,982010,982011,982012,982013,982162 CVE References: CVE-2014-9767,CVE-2015-4116,CVE-2015-7803,CVE-2015-8835,CVE-2015-8838,CVE-2015-8866,CVE-2015-8867,CVE-2015-8873,CVE-2015-8874,CVE-2015-8879,CVE-2016-2554,CVE-2016-3141,CVE-2016-3142,CVE-2016-3185,CVE-2016-4070,CVE-2016-4073,CVE-2016-4342,CVE-2016-4346,CVE-2016-4537,CVE-2016-4538,CVE-2016-4539,CVE-2016-4540,CVE-2016-4541,CVE-2016-4542,CVE-2016-4543,CVE-2016-4544,CVE-2016-5093,CVE-2016-5094,CVE-2016-5095,CVE-2016-5096,CVE-2016-5114 Sources used: SUSE OpenStack Cloud 5 (src): php53-5.3.17-71.1 SUSE Manager Proxy 2.1 (src): php53-5.3.17-71.1 SUSE Manager 2.1 (src): php53-5.3.17-71.1 SUSE Linux Enterprise Software Development Kit 11-SP4 (src): php53-5.3.17-71.1 SUSE Linux Enterprise Server 11-SP4 (src): php53-5.3.17-71.1 SUSE Linux Enterprise Server 11-SP3-LTSS (src): php53-5.3.17-71.1 SUSE Linux Enterprise Debuginfo 11-SP4 (src): php53-5.3.17-71.1 SUSE Linux Enterprise Debuginfo 11-SP3 (src): php53-5.3.17-71.1
SUSE-SU-2016:1638-1: An update that fixes 85 vulnerabilities is now available. Category: security (important) Bug References: 884986,884987,884989,884990,884991,884992,885961,886059,886060,893849,893853,902357,902360,902368,910659,914690,917150,918768,919080,921950,922451,922452,923945,924972,925109,928506,928511,931421,931769,931772,931776,933227,935074,935224,935226,935227,935229,935232,935234,935274,935275,938719,938721,942291,942296,945412,945428,949961,968284,969821,971611,971612,971912,973351,973792,976996,976997,977003,977005,977991,977994,978827,978828,978829,978830,980366,980373,980375,981050,982010,982011,982012,982013,982162 CVE References: CVE-2004-1019,CVE-2006-7243,CVE-2014-0207,CVE-2014-3478,CVE-2014-3479,CVE-2014-3480,CVE-2014-3487,CVE-2014-3515,CVE-2014-3597,CVE-2014-3668,CVE-2014-3669,CVE-2014-3670,CVE-2014-4049,CVE-2014-4670,CVE-2014-4698,CVE-2014-4721,CVE-2014-5459,CVE-2014-8142,CVE-2014-9652,CVE-2014-9705,CVE-2014-9709,CVE-2014-9767,CVE-2015-0231,CVE-2015-0232,CVE-2015-0273,CVE-2015-1352,CVE-2015-2301,CVE-2015-2305,CVE-2015-2783,CVE-2015-2787,CVE-2015-3152,CVE-2015-3329,CVE-2015-3411,CVE-2015-3412,CVE-2015-4021,CVE-2015-4022,CVE-2015-4024,CVE-2015-4026,CVE-2015-4116,CVE-2015-4148,CVE-2015-4598,CVE-2015-4599,CVE-2015-4600,CVE-2015-4601,CVE-2015-4602,CVE-2015-4603,CVE-2015-4643,CVE-2015-4644,CVE-2015-5161,CVE-2015-5589,CVE-2015-5590,CVE-2015-6831,CVE-2015-6833,CVE-2015-6836,CVE-2015-6837,CVE-2015-6838,CVE-2015-7803,CVE-2015-8835,CVE-2015-8838,CVE-2015-8866,CVE-2015-8867,CVE-2015-8873,CVE-2015-8874,CVE-2015-8879,CVE-2016-2554,CVE-2016-3141,CVE-2016-3142,CVE-2016-3185,CVE-2016-4070,CVE-2016-4073,CVE-2016-4342,CVE-2016-4346,CVE-2016-4537,CVE-2016-4538,CVE-2016-4539,CVE-2016-4540,CVE-2016-4541,CVE-2016-4542,CVE-2016-4543,CVE-2016-4544,CVE-2016-5093,CVE-2016-5094,CVE-2016-5095,CVE-2016-5096,CVE-2016-5114 Sources used: SUSE Linux Enterprise Server 11-SP2-LTSS (src): php53-5.3.17-47.1
all released