SB2018060641 - Ubuntu update for liblouis

Description

This security bulletin contains information about 3 vulnerabilities.

1) Stack-based buffer overflow (CVE-ID: CVE-2018-11683)

CWE-ID: CWE-121 - Stack-based buffer overflow

CVSSv4: 6.9 [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]

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

The vulnerability exists due to stack-based buffer overflow in the parseChars function, as defined in the compileTranslationTable.c source code file, during table parsing operations. A remote attacker can send a specially crafted request that submits malicious input, trigger memory corruption and cause the service to crash.

2) Stack-based buffer overflow (CVE-ID: CVE-2018-11684)

CWE-ID: CWE-121 - Stack-based buffer overflow

CVSSv4: 6.9 [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]

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

The vulnerability exists due to stack-based buffer overflow in the includeFile function, as defined in the compileTranslationTable.c source code file, during table parsing operations. A remote attacker can send a specially crafted request that submits malicious input, trigger memory corruption and cause the service to crash.

3) Stack-based buffer overflow (CVE-ID: CVE-2018-11685)

CWE-ID: CWE-121 - Stack-based buffer overflow

CVSSv4: 6.9 [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]

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

The vulnerability exists due to stack-based buffer overflow in the compileHyphenation function, as defined in the compileTranslationTable.c source code file, during table parsing operations. A remote attacker can send a specially crafted request that submits malicious input, trigger memory corruption and cause the service to crash.

Remediation

Install update from vendor's website.

References

• https://ubuntu.com/security/notices/USN-3672-1