Vulnerability in xqq libaribcaption

[ Why it matters ]Priority signals

• Public proof-of-concept exploit exists (CISA SSVC)

[ Description ]Official description

libaribcaption 1.1.0 through 1.1.2 contains a global out-of-bounds read in DecoderImpl::HandleGLGR() that reads past the 78-entry kLatinSpecialTable without an upper bound check. Attackers can supply crafted captions designating the Latin special set with ESC 28 4C followed by bytes 0x6F-0x7E to leak adjacent read-only data or crash decoding.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• github.com/xqq/libaribcaption/blob/v1.1.2/src/decoder/b24_conv_tables.hpp
• github.com/xqq/libaribcaption/blob/v1.1.2/src/decoder/decoder_impl.cpp
• github.com/xqq/libaribcaption/commit/9917cb311c93d884cb820d122911a211042da26c
• hackmd.io/@haindpwn/libaribcaption-latin-special-table-oob-read
• www.vulncheck.com/advisories/libaribcaption-1.1.0-through-1.1.2-out-of-bounds-read-via-…