Vulnerability in Libexpat_project Libexpat
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).
EPSS: 0.042 (89.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Libexpat_project Libexpat
- Netapp Active_iq_unified_manager
- Netapp Hci_baseboard_management_controller — versions h610c, h610s, h615c
- Netapp Oncommand_workflow_automation
- Netapp Solidfire_\&_hci_management_node
- Siemens Sinema_remote_connect_server
- Tenable Nessus
- Debian Debian_linux — versions 10.0, 11.0
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Exploit, Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Permissions Required, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- cve@mitre.org (mailing-list, x_refsource_MLIST, Exploit, Mailing List, Third Party Advisory)
- cve@mitre.org (x_refsource_CONFIRM, Third Party Advisory)
- cve@mitre.org (x_refsource_CONFIRM, Third Party Advisory)
- cve@mitre.org (vendor-advisory, Third Party Advisory, Issue Tracking, x_refsource_DEBIAN)
- cve@mitre.org (x_refsource_CONFIRM, Patch, Third Party Advisory)
- cve@mitre.org (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
Frequently asked questions
- What is CVE-2021-45960?
- CVE-2021-45960 is a high-severity vulnerability in Libexpat_project Libexpat, classified under Incorrect Calculation. CVSS score: 8.8/10. Published 2022-01-01.
- How severe is CVE-2021-45960?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-45960 known to be exploited?
- 12 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.