libzvbi up to 0.2.43 src/conv.c vbi_strndup_iconv_ucs2 src_length integer overflow

Summaryinfo

A vulnerability identified as problematic has been detected in libzvbi up to 0.2.43. This vulnerability affects the function vbi_strndup_iconv_ucs2 of the file src/conv.c. This manipulation of the argument src_length causes integer overflow. This vulnerability appears as CVE-2025-2174. The attack may be initiated remotely. In addition, an exploit is available. You should upgrade the affected component. The code maintainer was informed beforehand about the issues. She reacted very fast and highly professional.

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). Statistical analysis made it clear that VulDB provides the best quality for 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)

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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