CVE-2021-3345 — Out-of-bounds Write in Libgcrypt

CWE-787 — Out-of-bounds WriteCWE-191 — Integer Underflow (Wrap or Wraparound)CWE-122 — Heap-based Buffer Overflow7 documents7 sources
Severity
7.8HIGHNVD
EPSS
5.7%
top 9.57%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Gnupg LibgcryptOracle Communications Billing AND Revenue Management
Timeline
PublishedJan 29
Latest updateMay 24

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.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages2 packages

▶NVDgnupg/libgcrypt1.9.0

Patches

Patch: lists.gnupg.org ↗Patch: lists.gnupg.org ↗

🔴Vulnerability Details

3
GHSA
GHSA-pf53-rq8f-rwqx: _gcry_md_block_write in cipher/hash-common↗2022-05-24
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CVEList
CVE-2021-3345: _gcry_md_block_write in cipher/hash-common↗2021-01-29
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OSV
CVE-2021-3345: _gcry_md_block_write in cipher/hash-common↗2021-01-29
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📋Vendor Advisories

3
Oracle
Oracle Oracle Communications Applications Risk Matrix: Accounts Receivable (libgcrypt) — CVE-2021-3345↗2021-07-15
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Red Hat
libgcrypt: Heap buffer overflow in the block buffer management code↗2021-01-29
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Debian
CVE-2021-3345: libgcrypt20 - _gcry_md_block_write in cipher/hash-common.c in Libgcrypt version 1.9.0 has a he...↗2021
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