High advisory for libgphoto2

Advisory overview

libgphoto2 through 2.5.34 contains stack-based and heap-based buffer overflow vulnerabilities in jl2005c_init() that allow malicious USB devices to corrupt memory by supplying an unbounded allocation table entry count. Attackers can connect a spoofed Jeilin JL2005B/C/D camera reporting 1022 or more entries to overwrite the saved return address and heap data, potentially achieving code execution.

Related references

• https://github.com/gphoto/libgphoto2/blob/v2.5.34/camlibs/jl2005c/jl2005c.c#L138-L154
• https://github.com/gphoto/libgphoto2/commit/6a3393dd996502457ab965432cf0b2035278825e
• https://github.com/gphoto/libgphoto2/commit/af3b8e9c542cda863fb5f2f3cfeb261bd78e4442
• https://github.com/gphoto/libgphoto2/issues/1326
• https://hackmd.io/@haindpwn/libgphoto2-jl2005c-init-alloc-table-buffer-overflow
• https://www.vulncheck.com/advisories/libgphoto2-through-2.5.34-buffer-overflow-via-jl2005c-camera-driver