An issue was discovered in the Tatsuya Kinoshita w3m fork before 0.5.3-31. w3m doesn't properly validate the value of tag attribute, which allows remote attackers to cause a denial of service (heap buffer overflow crash) and possibly execute arbitrary code via a crafted HTML page.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
| Link | Tags |
|---|---|
| https://security.gentoo.org/glsa/201701-08 | vendor advisory |
| https://github.com/tats/w3m/blob/master/ChangeLog | patch issue tracking |
| http://www.securityfocus.com/bid/94407 | vdb entry |
| https://github.com/tats/w3m/issues/12 | patch issue tracking |
| http://www.openwall.com/lists/oss-security/2016/11/18/3 | third party advisory mailing list |