CVE-2015-8877

The gdImageScaleTwoPass function in gd_interpolation.c in the GD Graphics Library (aka libgd) before 2.2.0, as used in PHP before 5.6.12, uses inconsistent allocate and free approaches, which allows remote attackers to cause a denial of service (memory consumption) via a crafted call, as demonstrated by a call to the PHP imagescale function.

Updated libgd packages fix security vulnerabilities:

The gdImageScaleTwoPass function in gd_interpolation.c in libgd before 2.2.0 uses inconsistent allocate and free approaches, which allows remote attackers to cause a denial of service (memory consumption) via a crafted call, as demonstrated by a call to the PHP imagescale function (CVE-2015-8877).

While creating an XBM image (imagexbm) with an user supplied name, libgd before 2.2.0 did not check the vsnprintf return value, so an application might trust this length and read more memory than it should, causing a read-out-of boundaries, leaking stack memory (CVE-2016-5116).

This update for php5 fixes the following issues:

• CVE-2013-7456: imagescale out-of-bounds read (bnc#982009).
• CVE-2016-5093: get_icu_value_internal out-of-bounds read (bnc#982010).
• CVE-2016-5094: Don't create strings with lengths outside of valid range (bnc#982011).
• CVE-2016-5095: Don't create strings with lengths outside of valid range (bnc#982012).
• CVE-2016-5096: int/size_t confusion in fread (bsc#982013).
• CVE-2015-8877: The gdImageScaleTwoPass function in gd_interpolation.c in the GD Graphics Library (aka libgd) as used in PHP used inconsistent allocate and free approaches, which allowed remote attackers to cause a denial of service (memory consumption) via a crafted call, as demonstrated by a call to the PHP imagescale function (bsc#981061).
• CVE-2015-8876: Zend/zend_exceptions.c in PHP did not validate certain Exception objects, which allowed remote attackers to cause a denial of service (NULL pointer dereference and application crash) or trigger unintended method execution via crafted serialized data (bsc#981049).
• CVE-2015-8879: The odbc_bindcols function in ext/odbc/php_odbc.c in PHP mishandles driver behavior for SQL_WVARCHAR columns, which allowed remote attackers to cause a denial of service (application crash) in opportunistic circumstances by leveraging use of the odbc_fetch_array function to access a certain type of Microsoft SQL Server table (bsc#981050).

It was discovered that the GD library incorrectly handled certain color tables in XPM images. If a user or automated system were tricked into processing a specially crafted XPM image, an attacker could cause a denial of service. This issue only affected Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-2497)

It was discovered that the GD library incorrectly handled certain malformed GIF images. If a user or automated system were tricked into processing a specially crafted GIF image, an attacker could cause a denial of service. This issue only affected Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-9709)

It was discovered that the GD library incorrectly handled memory when using gdImageFillToBorder(). A remote attacker could possibly use this issue to cause a denial of service. (CVE-2015-8874)

It was discovered that the GD library incorrectly handled memory when using gdImageScaleTwoPass(). A remote attacker could possibly use this issue to cause a denial of service. This issue only applied to Ubuntu 14.04 LTS, Ubuntu 15.10 and Ubuntu 16.04 LTS. (CVE-2015-8877)

Hans Jerry Illikainen discovered that the GD library incorrectly handled certain malformed GD images. If a user or automated system were tricked into processing a specially crafted GD image, an attacker could cause a denial of service or possibly execute arbitrary code. (CVE-2016-3074)