critical
CVE-2015-6835
php: use-after-free vulnerability in session deserializer
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.
Severity by source
NVD9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat5.1AV:N/AC:H/Au:N/C:P/I:P/A:P
Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Ubuntu (medium), Red Hat (low), Amazon (low).
Description
The session deserializer in PHP before 5.4.45, 5.5.x before 5.5.29, and 5.6.x before 5.6.13 mishandles multiple php_var_unserialize calls, which allow remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via crafted session content.
Affected packages and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| amazon linux 1 | php54, php54-bcmath, php54-cli and 90 more | 5.4.45-1.75.amzn1 and 2 more |
| debian 7 | php5 | 5.4.45-0+deb7u1 |
| debian 8 | php5 | 5.6.13+dfsg-0+deb8u1 |
| Red Hat | php, php-bcmath, php-cli and 25 more | no fix listed |
| ubuntu 12.04 | php5 | 5.3.10-1ubuntu3.20 |
| ubuntu 14.04 | php5 | 5.5.9+dfsg-1ubuntu4.13 |
| ubuntu 14.04-ESM | php5 | 5.5.9+dfsg-1ubuntu4.13 |
| ubuntu 15.04 | php5 | 5.6.4+dfsg-4ubuntu6.3 |
Show all 127 entries from 8 sources
| Source | Package | Fixed in |
|---|---|---|
| amazon linux 1 | php54 | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-bcmath | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-cli | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-common | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-dba | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-debuginfo | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-devel | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-embedded | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-enchant | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-fpm | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-gd | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-imap | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-intl | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-ldap | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-mbstring | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-mcrypt | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-mssql | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-mysql | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-mysqlnd | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-odbc | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-pdo | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-pgsql | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-process | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-pspell | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-recode | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-snmp | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-soap | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-tidy | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-xml | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php54-xmlrpc | 5.4.45-1.75.amzn1 |
| amazon linux 1 | php55 | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-bcmath | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-cli | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-common | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-dba | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-debuginfo | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-devel | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-embedded | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-enchant | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-fpm | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-gd | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-gmp | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-imap | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-intl | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-ldap | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-mbstring | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-mcrypt | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-mssql | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-mysqlnd | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-odbc | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-opcache | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-pdo | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-pgsql | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-process | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-pspell | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-recode | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-snmp | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-soap | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-tidy | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-xml | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php55-xmlrpc | 5.5.30-1.110.amzn1 |
| amazon linux 1 | php56 | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-bcmath | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-cli | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-common | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-dba | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-dbg | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-debuginfo | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-devel | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-embedded | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-enchant | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-fpm | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-gd | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-gmp | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-imap | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-intl | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-ldap | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-mbstring | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-mcrypt | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-mssql | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-mysqlnd | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-odbc | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-opcache | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-pdo | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-pgsql | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-process | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-pspell | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-recode | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-snmp | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-soap | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-tidy | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-xml | 5.6.14-1.119.amzn1 |
| amazon linux 1 | php56-xmlrpc | 5.6.14-1.119.amzn1 |
| debian 7 | php5 | 5.4.45-0+deb7u1 |
| debian 8 | php5 | 5.6.13+dfsg-0+deb8u1 |
| Red Hat | php | no fix listed |
| Red Hat | php-bcmath | no fix listed |
| Red Hat | php-cli | no fix listed |
| Red Hat | php-common | no fix listed |
| Red Hat | php-dba | no fix listed |
| Red Hat | php-devel | no fix listed |
| Red Hat | php-embedded | no fix listed |
| Red Hat | php-enchant | no fix listed |
| Red Hat | php-fpm | no fix listed |
| Red Hat | php-gd | no fix listed |
| Red Hat | php-imap | no fix listed |
| Red Hat | php-intl | no fix listed |
| Red Hat | php-ldap | no fix listed |
| Red Hat | php-mbstring | no fix listed |
| Red Hat | php-mysql | no fix listed |
| Red Hat | php-mysqlnd | no fix listed |
| Red Hat | php-odbc | no fix listed |
| Red Hat | php-pdo | no fix listed |
| Red Hat | php-pgsql | no fix listed |
| Red Hat | php-process | no fix listed |
| Red Hat | php-pspell | no fix listed |
| Red Hat | php-recode | no fix listed |
| Red Hat | php-snmp | no fix listed |
| Red Hat | php-soap | no fix listed |
| Red Hat | php-tidy | no fix listed |
| Red Hat | php-xml | no fix listed |
| Red Hat | php-xmlrpc | no fix listed |
| Red Hat | php-zts | no fix listed |
| ubuntu 12.04 | php5 | 5.3.10-1ubuntu3.20 |
| ubuntu 14.04 | php5 | 5.5.9+dfsg-1ubuntu4.13 |
| ubuntu 14.04-ESM | php5 | 5.5.9+dfsg-1ubuntu4.13 |
| ubuntu 15.04 | php5 | 5.6.4+dfsg-4ubuntu6.3 |
References
- http://php.net/ChangeLog-5.php
- http://www.debian.org/security/2015/dsa-3358
- http://www.openwall.com/lists/oss-security/2015/09/07/5
- http://www.securityfocus.com/bid/76734
- http://www.securitytracker.com/id/1033548
- https://access.redhat.com/security/cve/CVE-2015-6835
- https://bugs.php.net/bug.php?id=70219
- https://nvd.nist.gov/vuln/detail/CVE-2015-6835