Vulnerability Description
A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be considered Low as it's very complex to an attacker control the encoding and positioning of corrupted Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Grub2 | >= 2.00, < 2.12 |
| Redhat | Developer Tools | 1.0 |
| Redhat | Openshift | 3.0 |
| Redhat | Enterprise Linux | 8.0 |
| Redhat | Enterprise Linux Eus | 8.2 |
| Redhat | Enterprise Linux For Power Little Endian | 8.0 |
| Redhat | Enterprise Linux For Power Little Endian Eus | 8.2 |
| Redhat | Enterprise Linux Server Aus | 8.2 |
| Redhat | Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions | 8.1 |
| Redhat | Enterprise Linux Server Tus | 8.2 |
| Redhat | Openshift Container Platform | 4.6 |
| Redhat | Codeready Linux Builder | - |
| Netapp | Ontap Select Deploy Administration Utility | - |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1991686Issue TrackingThird Party Advisory
- https://security.gentoo.org/glsa/202209-12Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220930-0001/Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1991686Issue TrackingThird Party Advisory
- https://security.gentoo.org/glsa/202209-12Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220930-0001/Third Party Advisory
FAQ
What is CVE-2021-3696?
CVE-2021-3696 is a vulnerability with a CVSS score of 4.5 (MEDIUM). A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may...
How severe is CVE-2021-3696?
CVE-2021-3696 has been rated MEDIUM with a CVSS base score of 4.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-3696?
Check the references section above for vendor advisories and patch information. Affected products include: Gnu Grub2, Redhat Developer Tools, Redhat Openshift, Redhat Enterprise Linux, Redhat Enterprise Linux Eus.