Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: zero the sockaddr before returning it in getname iso_sock_getname() fills a struct sockaddr_iso in place and returns its size without clearing it first, so bytes it does not write are copied to user space from the kernel stack. The getsockname(2) and getpeername(2) paths both run through do_getsockname(), which hands getname() an uninitialized sockaddr_storage on the stack and copies back up to the number of bytes getname() returns, so the driver has to initialize every byte it accounts for. Two ranges are left uninitialized: - struct sockaddr_iso is 10 bytes but only 9 are written (family, iso_bdaddr, iso_bdaddr_type), leaking the trailing pad byte on every call. - for a broadcast peer (BIS_LINK or PA_LINK) the returned length grows by sizeof(struct sockaddr_iso_bc), but only bc_sid, bc_num_bis and bc_bis are filled; bc_bdaddr and bc_bdaddr_type, the first 7 bytes of that structure, are never written. An unprivileged process can open a BTPROTO_ISO socket and reach the pad leak with getsockname(); the broadcast leak needs an established BIS/PA connection. l2cap and rfcomm already memset their sockaddr in getname for the same reason; do the same here.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ccf74f2390d60a2f9a75ef496d2564abb478f46a before 90be10604936c9042dc6238d8836abafca471811; affected ccf74f2390d60a2f9a75ef496d2564abb478f46a before 554594d032aa4356ca4be75d0cb46e13d350dbd2; affected ccf74f2390d60a2f9a75ef496d2564abb478f46a before 1f6d1f2611af0eb36b133a41d29ffd2cc2601615; affected ccf74f2390d60a2f9a75ef496d2564abb478f46a before 9069be87c67f290783b332c4284e09fb89cb9ea7; affected ccf74f2390d60a2f9a75ef496d2564abb478f46a before 190b719b787eb4ca6c25b12fab224806f9108b06; affected ccf74f2390d60a2f9a75ef496d2564abb478f46a before 884cf2cc957da7ac178a0e6c6c69ddfec0481cc8 |
| Linux / Linux | affected 6.0; unaffected 0 before 6.0; unaffected 6.6.160 through 6.6.*; unaffected 6.12.114 through 6.12.*; unaffected 6.18.47 through 6.18.*; unaffected 7.1.11 through 7.1.*; unaffected 7.2.1 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/90be10604936c9042dc6238d8836abafca471811
- https://git.kernel.org/stable/c/554594d032aa4356ca4be75d0cb46e13d350dbd2
- https://git.kernel.org/stable/c/1f6d1f2611af0eb36b133a41d29ffd2cc2601615
- https://git.kernel.org/stable/c/9069be87c67f290783b332c4284e09fb89cb9ea7
- https://git.kernel.org/stable/c/190b719b787eb4ca6c25b12fab224806f9108b06
- https://git.kernel.org/stable/c/884cf2cc957da7ac178a0e6c6c69ddfec0481cc8