Vulnerability Monitor

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CVE-2021-45960

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).

Published

2022-01-01T19:15:08.030

Last Modified

2025-05-05T17:17:28.457

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.8 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

Access Vector: NETWORK
Access Complexity: LOW
Authentication: SINGLE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

8.0

Impact Score

10.0

Weaknesses

Type: Primary
CWE-682
Type: Secondary
CWE-682

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	libexpat_project	libexpat	< 2.4.3	Yes
Application	tenable	nessus	< 8.15.3	Yes
Application	tenable	nessus	< 10.1.1	Yes
Operating System	debian	debian_linux	10.0	Yes
Operating System	debian	debian_linux	11.0	Yes
Application	siemens	sinema_remote_connect_server	< 3.1	Yes
Application	netapp	active_iq_unified_manager	-	Yes
Application	netapp	hci_baseboard_management_controller	h610c	Yes
Application	netapp	hci_baseboard_management_controller	h610s	Yes
Application	netapp	hci_baseboard_management_controller	h615c	Yes
Application	netapp	oncommand_workflow_automation	-	Yes
Application	netapp	solidfire_\&_hci_management_node	-	Yes

References

http://www.openwall.com/lists/oss-security/2022/01/17/3 Exploit, Mailing List, Third Party Advisory ([email protected])
https://bugzilla.mozilla.org/show_bug.cgi?id=1217609 Issue Tracking, Permissions Required, Third Party Advisory ([email protected])
https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf Patch, Third Party Advisory ([email protected])
https://github.com/libexpat/libexpat/issues/531 Exploit, Issue Tracking, Patch, Third Party Advisory ([email protected])
https://github.com/libexpat/libexpat/pull/534 Patch, Third Party Advisory ([email protected])
https://security.gentoo.org/glsa/202209-24 Third Party Advisory ([email protected])
https://security.netapp.com/advisory/ntap-20220121-0004/ Third Party Advisory ([email protected])
https://www.debian.org/security/2022/dsa-5073 Issue Tracking, Third Party Advisory ([email protected])
https://www.tenable.com/security/tns-2022-05 Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2022/01/17/3 Exploit, Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.mozilla.org/show_bug.cgi?id=1217609 Issue Tracking, Permissions Required, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/libexpat/libexpat/issues/531 Exploit, Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/libexpat/libexpat/pull/534 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/202209-24 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20220121-0004/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.debian.org/security/2022/dsa-5073 Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.tenable.com/security/tns-2022-05 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)