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
Ubuntu
openEuler
aspell (Alpine package)
aspell (Debian package)
aspell (Ubuntu package)
libaspell15 (Ubuntu package)
aspell
aspell-debugsource
aspell-devel
aspell-help
aspell-debuginfo

Install update from vendor's website.

Aspell - update to 0.60.8
aspell (Alpine package) - addressed in versions 0.60.6.1-r13, 0.60.6.1-r14
aspell (Debian package) - update to 0.60.7~20110707-6+deb10u1
aspell (Ubuntu package) - addressed in versions 0.60.7~20110707-1ubuntu0.1, 0.60.7~20110707-1ubuntu1+esm1, 0.60.7~20110707-3ubuntu0.1, 0.60.7~20110707-4ubuntu0.1, 0.60.7~20110707-6ubuntu0.1
libaspell15 (Ubuntu package) - addressed in versions 0.60.7~20110707-1ubuntu0.1, 0.60.7~20110707-1ubuntu1+esm1, 0.60.7~20110707-3ubuntu0.1, 0.60.7~20110707-4ubuntu0.1, 0.60.7~20110707-6ubuntu0.1
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
• Ubuntu update for aspell