#VU73214 Out-of-bounds write in HDF5 - CVE-2021-37501

Vulnerability identifier: #VU73214

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-37501

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
HDF5
Universal components / Libraries / Libraries used by multiple products

Vendor: HDF Group

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error within the h5tools_str_sprint() function in /hdf5/tools/lib/h5tools_str.c. A remote attacker can trigger an out-of-bounds write and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

HDF5: 1.12.0 - 1.12.2, 1.13.0

---

External links
https://github.com/ST4RF4LL/Something_Found/blob/main/HDF5_v1.13.0_h5dump_heap_overflow.md
https://github.com/HDFGroup/hdf5

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.