Quantum Secular Labs / Blog / Advisories

CVE-2018-11955: Lack of check on length of reason-code fetched from payload may lead driver access the memory not allocated…

CVE-2018-11955 is rated critical with a CVSS v3.0 base score of 9.8 and NVD lists 48 affected products, including Qualcomm Mdm9150 Firmware. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

Lack of check on length of reason-code fetched from payload may lead driver access the memory not allocated to the frame and results in out of bound read in Snapdragon Auto, Snapdragon Consumer Electronics Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon IoT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon Wearables in MDM9150, MDM9206, MDM9607, MDM9640, MDM9650, MSM8909W, MSM8996AU, QCA6174A, QCA6574AU, QCA9377, QCA9379, QCS405, QCS605, Qualcomm 215, SD 210/SD 212/SD 205, SD 425, SD 427, SD 430, SD 435, SD 439 / SD 429, SD 450, SD 600, SD 615/16/SD 415, SD 625, SD 632, SD 636, SD 650/52, SD 665, SD 712 / SD 710 / SD 670, SD 730, SD 820, SD 820A, SD 835, SD 845 / SD 850, SD 855, SDM439, SDM660, SDX20, SDX24

Severity breakdown

CVSS v3.0 9.8: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
  • Attack complexity: Low. No special conditions; the attack can be repeated reliably.
  • Privileges required: None. No account or prior access is needed.
  • User interaction: None. No action from any user is needed.
  • Scope: Unchanged. Impact stays within the vulnerable component.
  • Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
  • Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
  • Availability impact: High. Total loss of availability; the component can be shut down.

Underlying weakness

CWE-125: Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

Affected products

  • Qualcomm Mdm9150 Firmware: all versions listed by NVD
  • Qualcomm Mdm9206 Firmware: all versions listed by NVD
  • Qualcomm Mdm9607 Firmware: all versions listed by NVD
  • Qualcomm Mdm9640 Firmware: all versions listed by NVD
  • Qualcomm Mdm9650 Firmware: all versions listed by NVD
  • Qualcomm Msm8909w Firmware: all versions listed by NVD
  • Qualcomm Msm8996au Firmware: all versions listed by NVD
  • Qualcomm Qca6174a Firmware: all versions listed by NVD
  • Qualcomm Qca6574au Firmware: all versions listed by NVD
  • Qualcomm Qca9377 Firmware: all versions listed by NVD
  • Qualcomm Qca9379 Firmware: all versions listed by NVD
  • Qualcomm Qcs405 Firmware: all versions listed by NVD
  • Qualcomm Qcs605 Firmware: all versions listed by NVD
  • Qualcomm 215 Firmware: all versions listed by NVD
  • Qualcomm SD 210 Firmware: all versions listed by NVD

References