CVE-2021-28041
OpenSSH ssh-agent Double Free Vulnerability
Description
ssh-agent in OpenSSH before 8.5 has a double free that may be relevant in a few less-common scenarios, such as unconstrained agent-socket access on a legacy operating system, or the forwarding of an agent to an attacker-controlled host.
INFO
Published Date :
March 5, 2021, 9:15 p.m.
Last Modified :
Nov. 7, 2023, 3:32 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
1.2
Public PoC/Exploit Available at Github
CVE-2021-28041 has a 7 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-2021-28041
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.
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-2021-28041.
| URL | Resource |
|---|---|
| https://github.com/openssh/openssh-portable/commit/e04fd6dde16de1cdc5a4d9946397ff60d96568db | Patch Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KQWGII3LQR4AOTPPFXGMTYE7UDEWIUKI/ | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TXST2CML2MWY3PNVUXX7FFJE3ATJMNVZ/ | |
| https://security.gentoo.org/glsa/202105-35 | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20210416-0002/ | Third Party Advisory |
| https://www.openssh.com/security.html | Not Applicable Vendor Advisory |
| https://www.openssh.com/txt/release-8.5 | Release Notes Vendor Advisory |
| https://www.openwall.com/lists/oss-security/2021/03/03/1 | Mailing List Patch Third Party 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).
DockerLab - Machine
Máquina DockerLab
SSHScout is a lightweight tool designed to identify servers running SSH.
cve-2024-6387 openssh openssh-server ssh-banner vulnerability-checker vulnerability-detection
Python
Nmap's XML result parse and NVD's CPE correlation to search CVE.
Python
None
Walkthrough and Writeups for the HackTheBox Penetration Lab Testing Environment
External Penetration Testing - Holo Corporate Network - TryHackMe - Holo Network
penetration-testing pentest pentesting
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-28041 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-28041 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 [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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TXST2CML2MWY3PNVUXX7FFJE3ATJMNVZ/ [No types assigned] Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KQWGII3LQR4AOTPPFXGMTYE7UDEWIUKI/ [No types assigned] Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/TXST2CML2MWY3PNVUXX7FFJE3ATJMNVZ/ Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/KQWGII3LQR4AOTPPFXGMTYE7UDEWIUKI/ -
Modified Analysis by [email protected]
May. 20, 2022
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/KQWGII3LQR4AOTPPFXGMTYE7UDEWIUKI/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/KQWGII3LQR4AOTPPFXGMTYE7UDEWIUKI/ Mailing List, Third Party Advisory 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 Changed CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:oracle:communications_offline_mediation_controller:12.0.0.3.0:*:*:*:*:*:*:* *cpe:2.3:o:oracle:zfs_storage_appliance:8.8:*:*:*:*:*:*:* -
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] -
CVE Modified by [email protected]
Jun. 26, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/KQWGII3LQR4AOTPPFXGMTYE7UDEWIUKI/ [No Types Assigned] -
Modified Analysis by [email protected]
May. 27, 2021
Action Type Old Value New Value Changed Reference Type https://security.gentoo.org/glsa/202105-35 No Types Assigned https://security.gentoo.org/glsa/202105-35 Third Party Advisory -
CVE Modified by [email protected]
May. 26, 2021
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202105-35 [No Types Assigned] -
Reanalysis by [email protected]
May. 25, 2021
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:* versions up to (excluding) 8.5 OR *cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:* versions from (including) 8.2 up to (excluding) 8.5 -
Modified Analysis by [email protected]
Apr. 21, 2021
Action Type Old Value New Value Changed Reference Type https://security.netapp.com/advisory/ntap-20210416-0002/ No Types Assigned https://security.netapp.com/advisory/ntap-20210416-0002/ Third Party Advisory Changed Reference Type https://www.openssh.com/security.html Vendor Advisory https://www.openssh.com/security.html Not Applicable, Vendor Advisory Added CPE Configuration OR *cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:hci_compute_node_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:hci_storage_node_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:hci_storage_node:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Apr. 16, 2021
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20210416-0002/ [No Types Assigned] -
Modified Analysis by [email protected]
Mar. 26, 2021
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/TXST2CML2MWY3PNVUXX7FFJE3ATJMNVZ/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/TXST2CML2MWY3PNVUXX7FFJE3ATJMNVZ/ Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Mar. 23, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/TXST2CML2MWY3PNVUXX7FFJE3ATJMNVZ/ [No Types Assigned] -
Reanalysis by [email protected]
Mar. 17, 2021
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Removed CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V2 NIST (AV:N/AC:H/Au:S/C:P/I:P/A:P) Removed CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CVSS V3.1 NIST AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H -
Initial Analysis by [email protected]
Mar. 09, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://github.com/openssh/openssh-portable/commit/e04fd6dde16de1cdc5a4d9946397ff60d96568db No Types Assigned https://github.com/openssh/openssh-portable/commit/e04fd6dde16de1cdc5a4d9946397ff60d96568db Patch, Third Party Advisory Changed Reference Type https://www.openssh.com/security.html No Types Assigned https://www.openssh.com/security.html Vendor Advisory Changed Reference Type https://www.openssh.com/txt/release-8.5 No Types Assigned https://www.openssh.com/txt/release-8.5 Release Notes, Vendor Advisory Changed Reference Type https://www.openwall.com/lists/oss-security/2021/03/03/1 No Types Assigned https://www.openwall.com/lists/oss-security/2021/03/03/1 Mailing List, Patch, Third Party Advisory Added CWE NIST CWE-415 Added CPE Configuration OR *cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:* versions up to (excluding) 8.5
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-28041 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-2021-28041
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.18 }} 0.02%
score
0.55538
percentile