SB2021080302 - Debian update for aspell

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Main Vulnerability Database SB2021080302

SB2021080302 - Debian update for aspell

Published: August 3, 2021

Security Bulletin ID SB2021080302
CSH Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Out-of-bounds read (CVE-ID: CVE-2019-17544)

CWE-ID: CWE-125 - Out-of-bounds read

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


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition when processing an isolated character within the acommon::unescape() function in common/getdata.cpp file in GNU Aspell. A remote attacker can create a specially crafted Excel file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system or crash the application.


2) Heap-based buffer overflow (CVE-ID: CVE-2019-25051)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

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


The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the acommon::ObjStack::dup_top (called from acommon::StringMap::add and acommon::Config::lookup_list). A remote attacker can trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Remediation

Install update from vendor's website.

References