Vulnerability CVE-2021-3345
Published: 2021-01-29

Description:
_gcry_md_block_write in cipher/hash-common.c in Libgcrypt version 1.9.0 has a heap-based buffer overflow when the digest final function sets a large count value. It is recommended to upgrade to 1.9.1 or later.

Type:

CWE-787

CVSS2 => (AV:L/AC:L/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.2/10
10/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Gnupg -> Libgcrypt 

 References:
https://bugs.gentoo.org/show_bug.cgi?id=767814
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=512c0c75276949f13b6373b5c04f7065af750b08
https://gnupg.org
https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000455.html
https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000456.html
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