regex.c in GNU ed before 1.14.1 allows attackers to cause a denial of service (crash) via a malformed command, which triggers an invalid free.
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
| Link | Tags |
|---|---|
| http://www.openwall.com/lists/oss-security/2017/01/12/5 | mailing list third party advisory patch |
| http://www.openwall.com/lists/oss-security/2017/01/12/6 | third party advisory mailing list |
| https://lists.gnu.org/archive/html/bug-ed/2017-01/msg00000.html | mailing list vendor advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZVH54XNZ77ICNBJTPI2DLJYQTA3SYSFC/ | vendor advisory |
| http://www.securityfocus.com/bid/95422 | vdb entry third party advisory |
| http://www.openwall.com/lists/oss-security/2017/01/12/7 | third party advisory mailing list |
| http://www.openwall.com/lists/oss-security/2017/01/13/3 | third party advisory mailing list |