An issue was discovered in t1_check_unusual_charstring functions in writet1.c files in TeX Live before 2018-09-21. A buffer overflow in the handling of Type 1 fonts allows arbitrary code execution when a malicious font is loaded by one of the vulnerable tools: pdflatex, pdftex, dvips, or luatex.
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://github.com/TeX-Live/texlive-source/commit/6ed0077520e2b0da1fd060c7f88db7b2e6068e4c | third party advisory patch |
| https://www.debian.org/security/2018/dsa-4299 | third party advisory vendor advisory |
| https://lists.debian.org/debian-security-announce/2018/msg00230.html | third party advisory mailing list |
| https://usn.ubuntu.com/3788-1/ | third party advisory vendor advisory |
| https://usn.ubuntu.com/3788-2/ | third party advisory vendor advisory |