SB2018122509 - Denial of service in libxls

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Main Vulnerability Database SB2018122509

SB2018122509 - Denial of service in libxls

Published: December 25, 2018

Security Bulletin ID SB2018122509
CSH Severity
Low
Patch available
NO
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Double-free error (CVE-ID: CVE-2018-20450)

CWE-ID: CWE-415 - Double Free

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear


The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to insufficient validation of user-supplied input in the read_MSAT function in ole.c. A remote attacker can submit a specially crafted Excel file, trigger double-free error and cause the service to crash.


2) Memory corruption (CVE-ID: CVE-2018-20452)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear


The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to inconsistent memory management (new versus free) in ole2_read_header in ole.c. A remote attacker can submit a specially crafted Excel file, trigger an invalid free in the read_MSAT_body function in ole.c and cause the service to crash.


Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References