Summaryinfo

A vulnerability was found in libzvbi up to 0.2.43. It has been rated as problematic. Affected by this issue is the function vbi_strndup_iconv_ucs2 of the file src/conv.c. The manipulation of the argument src_length leads to integer overflow. This vulnerability is handled as CVE-2025-2174. The attack may be launched remotely. Furthermore, there is an exploit available. It is recommended to upgrade the affected component. The code maintainer was informed beforehand about the issues. She reacted very fast and highly professional. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Detailsinfo

A vulnerability was found in libzvbi up to 0.2.43. It has been declared as problematic. Affected by this vulnerability is the function vbi_strndup_iconv_ucs2 of the file src/conv.c. The manipulation of the argument src_length with an unknown input leads to a integer overflow vulnerability. The CWE definition for the vulnerability is CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. As an impact it is known to affect availability.

The weakness was presented by Yariv Nedivi as GHSA-g7cg-7gw9-v8cf. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2025-2174. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known.

It is declared as proof-of-concept. The code maintainer was informed beforehand about the issues. She reacted very fast and highly professional. The vulnerability scanner Nessus provides a plugin with the ID 233205 (SUSE SLED15 / SLES15 / openSUSE 15 Security Update : zvbi (SUSE-SU-2025:0979-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.2.44 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch ca1672134b3e2962cd392212c73f44f8f4cb489f is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (233205). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• libzvbi

Version

• 0.2.0
• 0.2.1
• 0.2.2
• 0.2.3
• 0.2.4
• 0.2.5
• 0.2.6
• 0.2.7
• 0.2.8
• 0.2.9
• 0.2.10
• 0.2.11
• 0.2.12
• 0.2.13
• 0.2.14
• 0.2.15
• 0.2.16
• 0.2.17
• 0.2.18
• 0.2.19
• 0.2.20
• 0.2.21
• 0.2.22
• 0.2.23
• 0.2.24
• 0.2.25
• 0.2.26
• 0.2.27
• 0.2.28
• 0.2.29
• 0.2.30
• 0.2.31
• 0.2.32
• 0.2.33
• 0.2.34
• 0.2.35
• 0.2.36
• 0.2.37
• 0.2.38
• 0.2.39
• 0.2.40
• 0.2.41
• 0.2.42
• 0.2.43

License

• open-source

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Submitinfo

Accepted

• Submit #512800: Open Source libzvbi 0.2.43 Integer Overflow -> Heap Overflow (by ninpwn)

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