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The load_mixer_volumes() function, which can be triggered by unprivileged users via the SOUND_MIXER_SETLEVELS ioctl, is vulnerable to a buffer overflow. Because the provided "name" argument isn't guaranteed to be NULL terminated at the expected 32 bytes, it's possible to overflow past the end of the last element in the mixer_vols array. Further exploitation can result in an arbitrary kernel write (via subsequent calls to load_mixer_volumes()) leading to privilege escalation, or arbitrary kernel reads via get_mixer_levels(). In addition, the strcmp() may leak bytes beyond the mixer_vols array. Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com> Cc: stable <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de> |
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| .. | ||
| dmasound | ||
| .gitignore | ||
| ac97_codec.c | ||
| ad1848_mixer.h | ||
| ad1848.c | ||
| ad1848.h | ||
| aedsp16.c | ||
| au1550_ac97.c | ||
| audio.c | ||
| bin2hex.c | ||
| CHANGELOG | ||
| coproc.h | ||
| dev_table.c | ||
| dev_table.h | ||
| dmabuf.c | ||
| hex2hex.c | ||
| kahlua.c | ||
| Kconfig | ||
| Makefile | ||
| midi_ctrl.h | ||
| midi_synth.c | ||
| midi_synth.h | ||
| midibuf.c | ||
| mpu401.c | ||
| mpu401.h | ||
| msnd_classic.c | ||
| msnd_classic.h | ||
| msnd_pinnacle.c | ||
| msnd_pinnacle.h | ||
| msnd.c | ||
| msnd.h | ||
| opl3_hw.h | ||
| opl3.c | ||
| os.h | ||
| pas2_card.c | ||
| pas2_midi.c | ||
| pas2_mixer.c | ||
| pas2_pcm.c | ||
| pas2.h | ||
| pss.c | ||
| README.FIRST | ||
| sb_audio.c | ||
| sb_card.c | ||
| sb_card.h | ||
| sb_common.c | ||
| sb_ess.c | ||
| sb_ess.h | ||
| sb_midi.c | ||
| sb_mixer.c | ||
| sb_mixer.h | ||
| sb.h | ||
| sequencer.c | ||
| sound_calls.h | ||
| sound_config.h | ||
| sound_firmware.h | ||
| sound_timer.c | ||
| soundcard.c | ||
| soundvers.h | ||
| swarm_cs4297a.c | ||
| sys_timer.c | ||
| trix.c | ||
| tuning.h | ||
| uart401.c | ||
| uart6850.c | ||
| ulaw.h | ||
| v_midi.c | ||
| v_midi.h | ||
| vidc_fill.S | ||
| vidc.c | ||
| vidc.h | ||
| vwsnd.c | ||
| waveartist.c | ||
| waveartist.h | ||
The modular sound driver patches were funded by Red Hat Software (www.redhat.com). The sound driver here is thus a modified version of Hannu's code. Please bear that in mind when considering the appropriate forums for bug reporting. Alan Cox