An issue was discovered in Teluu pjproject (pjlib and pjlib-util) in PJSIP before 2.7.1. Parsing the numeric header fields in a SIP message (like cseq, ttl, port, etc.) all had the potential to overflow, either causing unintended values to be captured or, if the values were subsequently converted back to strings, a buffer overrun. This will lead to a potential exploit using carefully crafted invalid values.
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://trac.pjsip.org/repos/milestone/release-2.7.1 | release notes vendor advisory |
| https://www.debian.org/security/2018/dsa-4170 | third party advisory vendor advisory |
| https://trac.pjsip.org/repos/ticket/2056 | vendor advisory |