8.8
HIGH
CVE-2021-45960
Expat Left Shift Vulnerability
Description

In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory).

INFO

Published Date :

Jan. 1, 2022, 7:15 p.m.

Last Modified :

Nov. 21, 2024, 6:33 a.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

2.8
Public PoC/Exploit Available at Github

CVE-2021-45960 has a 8 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-2021-45960 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 Netapp active_iq_unified_manager
2 Netapp solidfire_\&_hci_management_node
3 Netapp oncommand_workflow_automation
4 Netapp hci_baseboard_management_controller
1 Debian debian_linux
1 Siemens sinema_remote_connect_server
1 Tenable nessus
1 Libexpat_project libexpat
: Total Affected Vendor : 5 | Products : 8
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-2021-45960.

URL Resource
http://www.openwall.com/lists/oss-security/2022/01/17/3 Exploit Mailing List Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1217609 Issue Tracking Permissions Required Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf Patch Third Party Advisory
https://github.com/libexpat/libexpat/issues/531 Exploit Issue Tracking Patch Third Party Advisory
https://github.com/libexpat/libexpat/pull/534 Patch Third Party Advisory
https://security.gentoo.org/glsa/202209-24 Third Party Advisory
https://security.netapp.com/advisory/ntap-20220121-0004/ Third Party Advisory
https://www.debian.org/security/2022/dsa-5073 Issue Tracking Third Party Advisory
https://www.tenable.com/security/tns-2022-05 Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/01/17/3 Exploit Mailing List Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1217609 Issue Tracking Permissions Required Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf Patch Third Party Advisory
https://github.com/libexpat/libexpat/issues/531 Exploit Issue Tracking Patch Third Party Advisory
https://github.com/libexpat/libexpat/pull/534 Patch Third Party Advisory
https://security.gentoo.org/glsa/202209-24 Third Party Advisory
https://security.netapp.com/advisory/ntap-20220121-0004/ Third Party Advisory
https://www.debian.org/security/2022/dsa-5073 Issue Tracking Third Party Advisory
https://www.tenable.com/security/tns-2022-05 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
fokypoky/places-list

None

asp-net-core csharp docker dockerfile javascript react webapi docker-compose

C# Dockerfile HTML JavaScript CSS

Updated: 8 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : Feb. 22, 2024, 6:42 p.m. This repo has been linked 383 different CVEs too.
Profile Photo
hshivhare67/external_expat_v2.2.6_CVE-2021-45960

None

CMake Makefile Shell M4 C C++ Python Inno Setup

Updated: 1 year, 8 months ago
0 stars 0 fork 0 watcher
Born at : April 6, 2023, 6:20 a.m. This repo has been linked 1 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
vincent-deng/veracode-container-security-finding-parser

Map Vulnerabilities into Different Layers of the Container Image

Python

Updated: 1 year, 11 months ago
1 stars 0 fork 0 watcher
Born at : Oct. 5, 2022, 12:07 p.m. This repo has been linked 1276 different CVEs too.
Profile Photo
Trinadh465/external_lib_AOSP10_r33_CVE-2021-45960_CVE-2021-46143-

None

CMake Makefile M4 Shell C C++ Python Inno Setup

Updated: 1 year, 3 months ago
0 stars 0 fork 0 watcher
Born at : May 25, 2022, 9:03 a.m. This repo has been linked 2 different CVEs too.
Profile Photo
nanopathi/external_expat_AOSP10_r33_CVE-2021-45960

None

CMake Makefile M4 Shell C C++ Python Inno Setup

Updated: 2 years, 8 months ago
0 stars 0 fork 0 watcher
Born at : April 11, 2022, 11:45 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-2021-45960 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-45960 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 http://www.openwall.com/lists/oss-security/2022/01/17/3
    Added Reference https://bugzilla.mozilla.org/show_bug.cgi?id=1217609
    Added Reference https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
    Added Reference https://github.com/libexpat/libexpat/issues/531
    Added Reference https://github.com/libexpat/libexpat/pull/534
    Added Reference https://security.gentoo.org/glsa/202209-24
    Added Reference https://security.netapp.com/advisory/ntap-20220121-0004/
    Added Reference https://www.debian.org/security/2022/dsa-5073
    Added Reference https://www.tenable.com/security/tns-2022-05
  • CVE Modified by [email protected]

    May. 14, 2024

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

    Oct. 06, 2022

    Action Type Old Value New Value
    Changed Reference Type https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf No Types Assigned https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf Patch, Third Party Advisory
    Changed Reference Type https://security.gentoo.org/glsa/202209-24 No Types Assigned https://security.gentoo.org/glsa/202209-24 Third Party Advisory
    Removed CPE Configuration OR *cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* *cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:siemens:sinema_remote_connect_server:*:*:*:*:*:*:*:* versions up to (excluding) 3.1
    Added CPE Configuration OR *cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* *cpe:2.3:a:netapp:hci_baseboard_management_controller:h610c:*:*:*:*:*:*:* *cpe:2.3:a:netapp:hci_baseboard_management_controller:h610s:*:*:*:*:*:*:* *cpe:2.3:a:netapp:hci_baseboard_management_controller:h615c:*:*:*:*:*:*:* *cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Sep. 29, 2022

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/202209-24 [No Types Assigned]
  • CWE Remap by [email protected]

    Jul. 12, 2022

    Action Type Old Value New Value
    Changed CWE CWE-400 CWE-682
  • CVE Modified by [email protected]

    Jun. 14, 2022

    Action Type Old Value New Value
    Added Reference https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf [No Types Assigned]
  • Modified Analysis by [email protected]

    Mar. 17, 2022

    Action Type Old Value New Value
    Changed Reference Type https://bugzilla.mozilla.org/show_bug.cgi?id=1217609 Issue Tracking, Third Party Advisory https://bugzilla.mozilla.org/show_bug.cgi?id=1217609 Issue Tracking, Permissions Required, Third Party Advisory
    Changed Reference Type https://www.debian.org/security/2022/dsa-5073 No Types Assigned https://www.debian.org/security/2022/dsa-5073 Issue Tracking, Third Party Advisory
    Changed CPE Configuration OR *cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:* OR *cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* *cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Feb. 14, 2022

    Action Type Old Value New Value
    Added Reference https://www.debian.org/security/2022/dsa-5073 [No Types Assigned]
  • Modified Analysis by [email protected]

    Feb. 11, 2022

    Action Type Old Value New Value
    Removed CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P)
    Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:C/I:C/A:C)
    Removed CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type http://www.openwall.com/lists/oss-security/2022/01/17/3 No Types Assigned http://www.openwall.com/lists/oss-security/2022/01/17/3 Exploit, Mailing List, Third Party Advisory
    Changed Reference Type https://security.netapp.com/advisory/ntap-20220121-0004/ No Types Assigned https://security.netapp.com/advisory/ntap-20220121-0004/ Third Party Advisory
    Changed Reference Type https://www.tenable.com/security/tns-2022-05 No Types Assigned https://www.tenable.com/security/tns-2022-05 Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:tenable:nessus:*:*:*:*:*:*:*:* versions up to (excluding) 8.15.3 *cpe:2.3:a:tenable:nessus:*:*:*:*:*:*:*:* versions from (including) 10.0.0 up to (excluding) 10.1.1
  • CVE Modified by [email protected]

    Feb. 09, 2022

    Action Type Old Value New Value
    Added Reference https://www.tenable.com/security/tns-2022-05 [No Types Assigned]
  • CVE Modified by [email protected]

    Jan. 21, 2022

    Action Type Old Value New Value
    Added Reference https://security.netapp.com/advisory/ntap-20220121-0004/ [No Types Assigned]
  • CVE Modified by [email protected]

    Jan. 17, 2022

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2022/01/17/3 [No Types Assigned]
  • Initial Analysis by [email protected]

    Jan. 12, 2022

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://bugzilla.mozilla.org/show_bug.cgi?id=1217609 No Types Assigned https://bugzilla.mozilla.org/show_bug.cgi?id=1217609 Issue Tracking, Third Party Advisory
    Changed Reference Type https://github.com/libexpat/libexpat/issues/531 No Types Assigned https://github.com/libexpat/libexpat/issues/531 Exploit, Issue Tracking, Patch, Third Party Advisory
    Changed Reference Type https://github.com/libexpat/libexpat/pull/534 No Types Assigned https://github.com/libexpat/libexpat/pull/534 Patch, Third Party Advisory
    Added CWE NIST CWE-400
    Added CPE Configuration OR *cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:* versions up to (excluding) 2.4.3
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-2021-45960 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-2021-45960 weaknesses.

Exploit Prediction

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

0.40 }} -0.62%

score

0.73301

percentile

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