Speex (libspeex) through 1.2.1 contains an out-of-bounds write vulnerability in speex_bits_read_whole_bytes() in libspeex/bits.c that mishandles length truncation for non-owned SpeexBits buffers. Attackers can stream crafted Speex data into buffers set up with speex_bits_init_buffer() or speex_bits_set_bit_buffer() to corrupt heap or stack memory and crash applications.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 6
https://github.com/xiph/speex
disclosure@vulncheck.com
https://github.com/xiph/speex/blob/Speex-1.2.1/libspeex/bits.c#L177
disclosure@vulncheck.com
https://github.com/xiph/speex/issues/42
disclosure@vulncheck.com
https://gitlab.xiph.org/xiph/speex/-/merge_requests/32
disclosure@vulncheck.com
https://hackmd.io/@haindpwn/speex-bits-read-whole-bytes-oob-write
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/speex-through-1.2.1-out-of-bounds-write-vi…
disclosure@vulncheck.com