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Integer overflow in proto.c in libotr before 4.1.1 on 64-bit platforms allows remote attackers to cause a denial of service (memory corruption and application crash) or execute arbitrary code via a series of large OTR messages, which triggers a heap-based buffer overflow.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade libotr. | Aug 30, 2017 | Apr 7, 2016 |
| Debian | — | Upgrade libotr | Apr 7, 2016 | Mar 9, 2016 |
| Freebsd | — | Upgrade libotr3Upgrade libotr | Dec 10, 2025 | Mar 9, 2016 |
| Gentoo Linux | — | Upgrade x11-plugins/pidgin-otr.Upgrade net-libs/libotr. | Oct 30, 2017 | Apr 7, 2016 |
| Oracle Solaris | — | Upgrade entire/ to version 11.4-11.4.0.0.1.15.0 on Solaris 11.4 | Oct 19, 2018 | Apr 7, 2016 |
| Suse | — | Upgrade libotr-develUpgrade libotr2Upgrade libotr5 | Mar 9, 2016 | Mar 9, 2016 |
| Ubuntu | — | Upgrade libotr2 | Apr 7, 2016 | Mar 10, 2016 |
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