w3m: An out-of-bounds write issue has been discovered in the backspace handling of the checkType() function in etc.c withi...
CVE-2023-4255 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2023-4255, released December 21, 2023. It is not reported as exploited. Patch Radar priority: Routine.
An out-of-bounds write issue has been discovered in the backspace handling of the checkType() function in etc.c within the W3M application. This vulnerability is triggered by supplying a specially crafted HTML file to the w3m binary. Exploitation of this flaw could lead to application crashes, resulting in a denial of service condition.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| w3m · Debian 13.5 (trixie) | 0.5.3+git20230121-2.1 | DEBIAN-CVE-2023-4255 | Dec 21, 2023 |
| w3m · Debian 14 | 0.5.3+git20230121-2.1 | DEBIAN-CVE-2023-4255 | Dec 21, 2023 |
| w3m · Ubuntu 18.04.6 LTS (bionic) | 0.5.3-36ubuntu0.1+esm1 | w3m 0.5.3-36ubuntu0.1+esm1 | Jan 1, 2024 |
| w3m · Ubuntu 20.04 LTS (focal) | 0.5.3-37ubuntu0.2 | w3m 0.5.3-37ubuntu0.2 | Jan 1, 2024 |
| w3m · Ubuntu 22.04.1 LTS (jammy) | 0.5.3+git20210102-6ubuntu0.2 | w3m 0.5.3+git20210102-6ubuntu0.2 | Jan 1, 2024 |
| w3m · Ubuntu 24.04.5 LTS (noble) | 0.5.3+git20230121-2ubuntu1 | w3m 0.5.3+git20230121-2ubuntu1 | Jan 1, 2024 |
| w3m · Ubuntu 24.10 (oracular) | 0.5.3+git20230121-2ubuntu1 | w3m 0.5.3+git20230121-2ubuntu1 | Jan 2, 2024 |
| w3m · Ubuntu 25.04 (plucky) | 0.5.3+git20230121-2ubuntu1 | w3m 0.5.3+git20230121-2ubuntu1 | Jan 2, 2024 |
| w3m-img · Ubuntu 18.04.6 LTS (bionic) | 0.5.3-36ubuntu0.1+esm1 | w3m-img 0.5.3-36ubuntu0.1+esm1 | Jan 1, 2024 |
| w3m-img · Ubuntu 20.04 LTS (focal) | 0.5.3-37ubuntu0.2 | w3m-img 0.5.3-37ubuntu0.2 | Jan 1, 2024 |
| w3m-img · Ubuntu 22.04.1 LTS (jammy) | 0.5.3+git20210102-6ubuntu0.2 | w3m-img 0.5.3+git20210102-6ubuntu0.2 | Jan 1, 2024 |
| w3m-img · Ubuntu 24.04.5 LTS (noble) | 0.5.3+git20230121-2ubuntu1 | w3m-img 0.5.3+git20230121-2ubuntu1 | Jan 1, 2024 |
| w3m-img · Ubuntu 24.10 (oracular) | 0.5.3+git20230121-2ubuntu1 | w3m-img 0.5.3+git20230121-2ubuntu1 | Jan 2, 2024 |
| w3m-img · Ubuntu 25.04 (plucky) | 0.5.3+git20230121-2ubuntu1 | w3m-img 0.5.3+git20230121-2ubuntu1 | Jan 2, 2024 |
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