Tatsuya Kinoshita w3m up to 0.5.3-30 addMultirowsForm memory corruption

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CTI Interest Score
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A vulnerability, which was classified as critical, was found in Tatsuya Kinoshita w3m up to 0.5.3-30 (Web Browser). Affected is the function addMultirowsForm. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in the Tatsuya Kinoshita w3m fork before 0.5.3-31. Heap-based buffer overflow in the addMultirowsForm function in w3m allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted HTML page.

The bug was discovered 11/18/2016. The weakness was presented 12/12/2016 (Website). The advisory is available at openwall.com. This vulnerability is traded as CVE-2016-9425 since 11/18/2016. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 19 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 95625 (SUSE SLES11 Security Update : w3m (SUSE-SU-2016:3046-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169418 (SUSE Enterprise Linux Security Update for w3m (SUSE-SU-2016:3046-1)).

Upgrading to version 0.5.3-31 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (95625) and SecurityFocus (BID 94407†).







CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.9

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
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NVD Base Score: 8.8
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Class: Memory corruption
CWE: CWE-119

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 95625
Nessus Name: SUSE SLES11 Security Update : w3m (SUSE-SU-2016:3046-1)
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OpenVAS ID: 867773
OpenVAS Name: Fedora Update for w3m FEDORA-2017-783e8fa63e
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Threat Intelligenceinfo

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Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: w3m 0.5.3-31


11/03/2016 🔍
11/18/2016 +15 days 🔍
11/18/2016 +0 days 🔍
12/07/2016 +19 days 🔍
12/08/2016 +1 days 🔍
12/11/2016 +3 days 🔍
12/12/2016 +1 days 🔍
12/12/2016 +0 days 🔍
10/05/2022 +2123 days 🔍


Advisory: 21
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-9425 (🔍)
SecurityFocus: 94407 - w3m Multiple Security Vulnerabilities


Created: 12/12/2016 09:36 AM
Updated: 10/05/2022 05:09 PM
Changes: 12/12/2016 09:36 AM (74), 06/25/2019 05:16 PM (6), 10/05/2022 05:09 PM (3)
Complete: 🔍
Cache ID: 44:4F2:40


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