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Vulnerability details: VCID-k28v-d66c-aaah
Vulnerability ID VCID-k28v-d66c-aaah
Aliases CVE-2021-45960
Summary 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).
Status Published
Exploitability 0.5
Weighted Severity 8.1
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-682 Incorrect Calculation
CWE-130 Improper Handling of Length Parameter Inconsistency
System Score Found at
rhas Important https://access.redhat.com/errata/RHSA-2022:0951
rhas Important https://access.redhat.com/errata/RHSA-2022:1069
cvssv3 8.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-45960.json
epss 0.00234 https://api.first.org/data/v1/epss?cve=CVE-2021-45960
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epss 0.00408 https://api.first.org/data/v1/epss?cve=CVE-2021-45960
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epss 0.0383 https://api.first.org/data/v1/epss?cve=CVE-2021-45960
cvssv3.1 8.8 https://bugzilla.mozilla.org/show_bug.cgi?id=1217609
ssvc Track* https://bugzilla.mozilla.org/show_bug.cgi?id=1217609
rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=2044451
cvssv3.1 8.8 https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
ssvc Track* https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
cvssv3.1 6.4 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 8.8 https://github.com/libexpat/libexpat/issues/531
ssvc Track* https://github.com/libexpat/libexpat/issues/531
cvssv3.1 8.8 https://github.com/libexpat/libexpat/pull/534
ssvc Track* https://github.com/libexpat/libexpat/pull/534
cvssv2 9.0 https://nvd.nist.gov/vuln/detail/CVE-2021-45960
cvssv3 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-45960
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-45960
cvssv3.1 8.8 https://security.gentoo.org/glsa/202209-24
ssvc Track* https://security.gentoo.org/glsa/202209-24
cvssv3.1 8.8 https://security.netapp.com/advisory/ntap-20220121-0004/
ssvc Track* https://security.netapp.com/advisory/ntap-20220121-0004/
cvssv3.1 8.8 https://www.debian.org/security/2022/dsa-5073
ssvc Track* https://www.debian.org/security/2022/dsa-5073
cvssv3.1 8.8 https://www.tenable.com/security/tns-2022-05
ssvc Track* https://www.tenable.com/security/tns-2022-05
cvssv3.1 8.8 http://www.openwall.com/lists/oss-security/2022/01/17/3
ssvc Track* http://www.openwall.com/lists/oss-security/2022/01/17/3
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-45960.json
https://api.first.org/data/v1/epss?cve=CVE-2021-45960
https://bugzilla.mozilla.org/show_bug.cgi?id=1217609
https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-45960
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-46143
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22822
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22823
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22824
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22825
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22826
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22827
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23852
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23990
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/libexpat/libexpat/issues/531
https://github.com/libexpat/libexpat/pull/534
https://security.gentoo.org/glsa/202209-24
https://security.netapp.com/advisory/ntap-20220121-0004/
https://www.debian.org/security/2022/dsa-5073
https://www.tenable.com/security/tns-2022-05
http://www.openwall.com/lists/oss-security/2022/01/17/3
1002994 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1002994
2044451 https://bugzilla.redhat.com/show_bug.cgi?id=2044451
cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
cpe:2.3:a:netapp:hci_baseboard_management_controller:h610c:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:hci_baseboard_management_controller:h610c:*:*:*:*:*:*:*
cpe:2.3:a:netapp:hci_baseboard_management_controller:h610s:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:hci_baseboard_management_controller:h610s:*:*:*:*:*:*:*
cpe:2.3:a:netapp:hci_baseboard_management_controller:h615c:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:hci_baseboard_management_controller:h615c:*:*:*:*:*:*:*
cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:*
cpe:2.3:a:siemens:sinema_remote_connect_server:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:siemens:sinema_remote_connect_server:*:*:*:*:*:*:*:*
cpe:2.3:a:tenable:nessus:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:tenable:nessus:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
CVE-2021-45960 https://nvd.nist.gov/vuln/detail/CVE-2021-45960
RHSA-2022:0951 https://access.redhat.com/errata/RHSA-2022:0951
RHSA-2022:1069 https://access.redhat.com/errata/RHSA-2022:1069
RHSA-2022:7144 https://access.redhat.com/errata/RHSA-2022:7144
USN-5288-1 https://usn.ubuntu.com/5288-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-45960.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://bugzilla.mozilla.org/show_bug.cgi?id=1217609
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2025-04-23T13:29:38Z/ Found at https://bugzilla.mozilla.org/show_bug.cgi?id=1217609
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2025-04-23T13:29:38Z/ Found at https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/libexpat/libexpat/issues/531
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2025-04-23T13:29:38Z/ Found at https://github.com/libexpat/libexpat/issues/531
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/libexpat/libexpat/pull/534
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2025-04-23T13:29:38Z/ Found at https://github.com/libexpat/libexpat/pull/534
Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C Found at https://nvd.nist.gov/vuln/detail/CVE-2021-45960
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-45960
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-45960
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://security.gentoo.org/glsa/202209-24
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2025-04-23T13:29:38Z/ Found at https://security.gentoo.org/glsa/202209-24
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://security.netapp.com/advisory/ntap-20220121-0004/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2025-04-23T13:29:38Z/ Found at https://security.netapp.com/advisory/ntap-20220121-0004/
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://www.debian.org/security/2022/dsa-5073
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2025-04-23T13:29:38Z/ Found at https://www.debian.org/security/2022/dsa-5073
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://www.tenable.com/security/tns-2022-05
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2025-04-23T13:29:38Z/ Found at https://www.tenable.com/security/tns-2022-05
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at http://www.openwall.com/lists/oss-security/2022/01/17/3
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2025-04-23T13:29:38Z/ Found at http://www.openwall.com/lists/oss-security/2022/01/17/3
Exploit Prediction Scoring System (EPSS)
Percentile 0.46331
EPSS Score 0.00234
Published At May 10, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.