CVE-2021-45960
HIGHCVSS 8.8/10EPSS 4.20%
Last modified
CVE-2021-45960 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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 estimates a 4.20% chance of exploitation in the next 30 days.
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).
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Libexpat Project | Libexpat | < 2.4.3 |
| Tenable | Nessus | < 8.15.3 |
| Tenable | Nessus | >= 10.0.0, < 10.1.1 |
| Debian | Debian Linux | 10.0 |
| Debian | Debian Linux | 11.0 |
| Siemens | Sinema Remote Connect Server | < 3.1 |
| Netapp | Active Iq Unified Manager | All versions |
| Netapp | Hci Baseboard Management Controller | h610c |
| Netapp | Hci Baseboard Management Controller | h610s |
| Netapp | Hci Baseboard Management Controller | h615c |
| Netapp | Oncommand Workflow Automation | All versions |
| Netapp | Solidfire \& Hci Management Node | All versions |
References
- http://www.openwall.com/lists/oss-security/2022/01/17/3Exploit, Mailing List, Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1217609Issue Tracking, Permissions Required, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdfPatch, Third Party Advisory
- https://github.com/libexpat/libexpat/issues/531Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/libexpat/libexpat/pull/534Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202209-24Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220121-0004/Third Party Advisory
- https://www.debian.org/security/2022/dsa-5073Issue Tracking, Third Party Advisory
- https://www.tenable.com/security/tns-2022-05Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/01/17/3Exploit, Mailing List, Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1217609Issue Tracking, Permissions Required, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdfPatch, Third Party Advisory
- https://github.com/libexpat/libexpat/issues/531Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/libexpat/libexpat/pull/534Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202209-24Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220121-0004/Third Party Advisory
- https://www.debian.org/security/2022/dsa-5073Issue Tracking, Third Party Advisory
- https://www.tenable.com/security/tns-2022-05Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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).
How severe is CVE-2021-45960?
CVE-2021-45960 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 4.20% probability of exploitation in the next 30 days.
How do I fix CVE-2021-45960?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-45960?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST