7.8
HIGH
CVE-2021-3345
Libgcrypt Heap-Based Buffer Overflow
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.

INFO

Published Date :

Jan. 29, 2021, 3:15 p.m.

Last Modified :

Nov. 21, 2024, 6:21 a.m.

Source :

[email protected]

Remotely Exploitable :

No

Impact Score :

5.9

Exploitability Score :

1.8
Public PoC/Exploit Available at Github

CVE-2021-3345 has a 9 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2021-3345 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Oracle communications_billing_and_revenue_management
1 Gnupg libgcrypt
: Total Affected Vendor : 2 | Products : 2
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-3345.

URL Resource
https://bugs.gentoo.org/show_bug.cgi?id=767814 Issue Tracking Vendor Advisory
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=512c0c75276949f13b6373b5c04f7065af750b08
https://gnupg.org Vendor Advisory
https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000455.html Mailing List Vendor Advisory
https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000456.html Mailing List Patch Vendor Advisory
https://www.oracle.com//security-alerts/cpujul2021.html Third Party Advisory
https://bugs.gentoo.org/show_bug.cgi?id=767814 Issue Tracking Vendor Advisory
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=512c0c75276949f13b6373b5c04f7065af750b08
https://gnupg.org Vendor Advisory
https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000455.html Mailing List Vendor Advisory
https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000456.html Mailing List Patch Vendor Advisory
https://www.oracle.com//security-alerts/cpujul2021.html Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
NaInSec/CVE-PoC-in-GitHub

All CVE - PoC in GitHub

poc proofofconcept tester allcve cvegithub cvenew cvepoc cveupdate

Updated: 1 month, 2 weeks ago
8 stars 3 fork 3 watcher
Born at : March 22, 2024, 3:58 p.m. This repo has been linked 928 different CVEs too.
Profile Photo
zecool/cve

None

Updated: 9 months, 1 week ago
1 stars 0 fork 0 watcher
Born at : March 11, 2024, 1:21 p.m. This repo has been linked 930 different CVEs too.
Profile Photo
SpiralBL0CK/CVE-2021-3345

Actual working exploit for CVE-2021-3345

Makefile C

Updated: 5 months, 3 weeks ago
3 stars 2 fork 2 watcher
Born at : Feb. 29, 2024, 10:05 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
whoforget/CVE-POC

None

Updated: 1 year, 8 months ago
0 stars 2 fork 2 watcher
Born at : April 8, 2023, 6:19 a.m. This repo has been linked 923 different CVEs too.
Profile Photo
k0mi-tg/CVE-POC

None

Updated: 10 months, 1 week ago
20 stars 3 fork 3 watcher
Born at : Feb. 14, 2023, 6:10 p.m. This repo has been linked 921 different CVEs too.
Profile Photo
WhooAmii/POC_to_review

None

Updated: 10 months ago
2 stars 2 fork 2 watcher
Born at : Nov. 25, 2022, 5:43 p.m. This repo has been linked 930 different CVEs too.
Profile Photo
soosmile/POC

None

Updated: 5 months, 3 weeks ago
8 stars 1 fork 1 watcher
Born at : June 21, 2022, 7:45 a.m. This repo has been linked 943 different CVEs too.
Profile Photo
developer3000S/PoC-in-GitHub

None

Updated: 2 months, 2 weeks ago
34 stars 3 fork 3 watcher
Born at : March 12, 2021, 12:22 p.m. This repo has been linked 1063 different CVEs too.
Profile Photo
MLGRadish/CVE-2021-3345

POC exploit of CVE-2021-3345, a vulnerability in libgcrypt version 1.9.0

exploit exploits exploit-development poc cve cve-2021-3345 libgcrypt vulnerability

Makefile C

Updated: 7 months, 2 weeks ago
9 stars 3 fork 3 watcher
Born at : Jan. 31, 2021, 9:28 a.m. This repo has been linked 1 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-3345 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-3345 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://bugs.gentoo.org/show_bug.cgi?id=767814
    Added Reference https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=512c0c75276949f13b6373b5c04f7065af750b08
    Added Reference https://gnupg.org
    Added Reference https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000455.html
    Added Reference https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000456.html
    Added Reference https://www.oracle.com//security-alerts/cpujul2021.html
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference MITRE https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=512c0c75276949f13b6373b5c04f7065af750b08 [No types assigned]
    Removed Reference MITRE https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=512c0c75276949f13b6373b5c04f7065af750b08
  • Modified Analysis by [email protected]

    Apr. 26, 2022

    Action Type Old Value New Value
    Changed Reference Type https://www.oracle.com//security-alerts/cpujul2021.html No Types Assigned https://www.oracle.com//security-alerts/cpujul2021.html Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:a:oracle:communications_billing_and_revenue_management:12.0.0.3.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Jul. 20, 2021

    Action Type Old Value New Value
    Added Reference https://www.oracle.com//security-alerts/cpujul2021.html [No Types Assigned]
  • Initial Analysis by [email protected]

    Feb. 04, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:C/I:C/A:C)
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://bugs.gentoo.org/show_bug.cgi?id=767814 No Types Assigned https://bugs.gentoo.org/show_bug.cgi?id=767814 Issue Tracking, Vendor Advisory
    Changed Reference Type https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=512c0c75276949f13b6373b5c04f7065af750b08 No Types Assigned https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=512c0c75276949f13b6373b5c04f7065af750b08 Mailing List, Patch, Third Party Advisory
    Changed Reference Type https://gnupg.org No Types Assigned https://gnupg.org Vendor Advisory
    Changed Reference Type https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000455.html No Types Assigned https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000455.html Mailing List, Vendor Advisory
    Changed Reference Type https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000456.html No Types Assigned https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000456.html Mailing List, Patch, Vendor Advisory
    Added CWE NIST CWE-787
    Added CPE Configuration OR *cpe:2.3:a:gnupg:libgcrypt:1.9.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Feb. 03, 2021

    Action Type Old Value New Value
    Changed Description _gcry_md_block_write in cipher/hash-common.c in Libgcrypt before 1.9.1 has a heap-based buffer overflow when the digest final function sets a large count value. _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.
  • CVE Modified by [email protected]

    Jan. 29, 2021

    Action Type Old Value New Value
    Added Reference https://bugs.gentoo.org/show_bug.cgi?id=767814 [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-3345 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-3345 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.06 }} -0.12%

score

0.27895

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: