Ubuntu update for aspell

1) Heap-based buffer overflow

EUVDB-ID: #VU55502

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-25051

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

Exploit availability: No

Description

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.

Mitigation

Update the affected package aspell to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 21.04

libaspell15 (Ubuntu package): before 0.60.8-2ubuntu0.1

aspell (Ubuntu package): before 0.60.8-2ubuntu0.1

External links

http://ubuntu.com/security/notices/USN-5023-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.