CVE-2021-3345
HIGHCVSS 7.8/10EPSS 1.06%
Last modified
CVE-2021-3345 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. _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.. EPSS estimates a 1.06% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Gnupg | Libgcrypt | 1.9.0 |
| Oracle | Communications Billing And Revenue Management | 12.0.0.3.0 |
References
- https://bugs.gentoo.org/show_bug.cgi?id=767814Issue Tracking, Vendor Advisory
- https://gnupg.orgVendor Advisory
- https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000455.htmlMailing List, Vendor Advisory
- https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000456.htmlMailing List, Patch, Vendor Advisory
- https://www.oracle.com//security-alerts/cpujul2021.htmlThird Party Advisory
- https://bugs.gentoo.org/show_bug.cgi?id=767814Issue Tracking, Vendor Advisory
- https://gnupg.orgVendor Advisory
- https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000455.htmlMailing List, Vendor Advisory
- https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000456.htmlMailing List, Patch, Vendor Advisory
- https://www.oracle.com//security-alerts/cpujul2021.htmlThird Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-3345?
_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.
How severe is CVE-2021-3345?
CVE-2021-3345 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.06% probability of exploitation in the next 30 days.
How do I fix CVE-2021-3345?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-33444An issue was discovered in mjs (mJS: Restricted JavaScript e…5.5
- CVE-2021-33445An issue was discovered in mjs (mJS: Restricted JavaScript e…5.5
- CVE-2021-33446An issue was discovered in mjs (mJS: Restricted JavaScript e…5.5
- CVE-2021-33447An issue was discovered in mjs (mJS: Restricted JavaScript e…5.5
- CVE-2021-33448An issue was discovered in mjs(mJS: Restricted JavaScript en…5.5
- CVE-2021-33449An issue was discovered in mjs (mJS: Restricted JavaScript e…5.5
- CVE-2021-33450An issue was discovered in NASM version 2.16rc0. There are m…5.5
- CVE-2021-33451An issue was discovered in lrzip version 0.641. There are me…5.5
- CVE-2021-33452An issue was discovered in NASM version 2.16rc0. There are m…5.5
- CVE-2021-33453An issue was discovered in lrzip version 0.641. There is a u…7.8
- CVE-2021-33454An issue was discovered in yasm version 1.3.0. There is a NU…5.5
- CVE-2021-33455An issue was discovered in yasm version 1.3.0. There is a NU…5.5
Are you affected by CVE-2021-3345?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST