Vulnerability identifier: #VU50150
Vulnerability risk: High
CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-122
Exploitation vector: Network
Exploit availability: Yes
Vulnerable software:
Libgcrypt
Client/Desktop applications /
Encryption software
Vendor: GNU
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 _gcry_md_block_write(0 function in cipher/hash-common.c in Libgcrypt. A remote attacker can pass specially crafted data to the application, trigger 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
Install updates from vendor's website.
Vulnerable software versions
Libgcrypt: 1.9.0
External links
http://bugs.gentoo.org/show_bug.cgi?id=767814
http://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=512c0c75276949f13b6373b5c04f7065af750b08
http://gnupg.org
http://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000455.html
http://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000456.html
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. However, proof of concept for this vulnerability is available.