Kingsoft Office 2012 8.1.0.3238 wpsio.dll memory corruption

Summaryinfo

A vulnerability was found in Kingsoft Office 2012 8.1.0.3238. It has been rated as critical. This vulnerability affects unknown code in the library wpsio.dll. The manipulation leads to memory corruption. This vulnerability is listed as CVE-2012-4886. In addition, an exploit is available.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Kingsoft Office 2012 8.1.0.3238. This issue affects an unknown function in the library wpsio.dll. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Stack-based buffer overflow in wpsio.dll in Kingsoft WPS Office 2012 possibly 8.1.0.3238 allows remote attackers to execute arbitrary code via a long BSTR string.

The weakness was presented 03/24/2014 (Website). The advisory is shared at exploit-db.com. The identification of this vulnerability is CVE-2012-4886 since 09/10/2012. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/04/2025).

A public exploit has been developed by Zhangjiantao and been published even before and not after the advisory. The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 327 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (83862), Exploit-DB (25140), SecurityFocus (BID 59529†) and OSVDB (92847†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• Kingsoft

Name

• Office 2012

Version

• 8.1.0.3238

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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