Out-of-bounds read in Aspell - CVE-2019-17544

Vulnerability identifier: #VU21946

CSH Severity: Low

CVSS v4: 5.1 [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]

CVE-ID: CVE-2019-17544

CWE-ID: CWE-125

Exploitation vector: Remote access

Exploit availability: No public exploit available

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.

Aspell
aspell (Debian package)
aspell (Alpine package)
aspell
aspell-debugsource
aspell-devel
aspell-help
aspell-debuginfo
openEuler

Install update from vendor's website.

Aspell - update to 0.60.8
aspell (Debian package) - update to 0.60.7~20110707-6+deb10u1
aspell (Alpine package) - addressed in versions 0.60.6.1-r13, 0.60.6.1-r14
aspell - update to 0.60.6.1-27
aspell-debugsource - update to 0.60.6.1-27
aspell-devel - update to 0.60.6.1-27
aspell-help - update to 0.60.6.1-27
aspell-debuginfo - update to 0.60.6.1-27

• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=16109
• https://github.com/GNUAspell/aspell/commit/80fa26c74279fced8d778351cff19d1d8f44fe4e
• https://github.com/GNUAspell/aspell/compare/rel-0.60.7...rel-0.60.8

• Denial of service in GNU Aspell
• Out-of-bounds read in aspell (Alpine package)
• Debian update for aspell
• openEuler update for aspell