Security advisory for Open5GS 1.3.0

Advisory overview

Open5GS 1.3.0 through 2.8.0 contains a heap out-of-bounds write vulnerability in parse_multipart() that allows unauthenticated attackers to corrupt memory by supplying an empty multipart boundary. Attackers can send a single crafted multipart/related request to the SBI interface of any network function, overflowing the lookbehind buffer and crashing it.

Related references

• https://github.com/open5gs/open5gs
• https://github.com/open5gs/open5gs/blob/v2.8.0/lib/sbi/contrib/multipart_parser.c#L260
• https://github.com/open5gs/open5gs/blob/v2.8.0/lib/sbi/message.c#L3372
• https://github.com/open5gs/open5gs/commit/6820c2743b5b5e126e3755d2f92dae2b236732df
• https://github.com/open5gs/open5gs/security/advisories/GHSA-25v2-v588-jq8g
• https://www.vulncheck.com/advisories/open5gs-1.3.0-through-2.8.0-heap-out-of-bounds-write-via-sbi-multipart-parser