A security flaw has been discovered in Kakao khaiii up to 0.4. The impacted element is the function khaiii::nn::Linear::open of the file src/main/cpp/khaiii/nn/Linear.cpp of the component JSON Config File Handler. The manipulation of the argument hiddendim/classnum results in out-of-bounds read. The attack requires a local approach. The exploit has been released to the public and may be used for attacks. The vendor explains: "khaiii treats the resource directory (--rsc-dir) as trusted input, like a binary or a shared library. To use this defect, an attacker must already be able to write to that directory. With that access, an attacker can change the analysis results without this defect." This vulnerability only affects products that are no longer supported by the maintainer.

A vulnerability was detected in Kakao 헤이카카오 Hey Kakao App up to 2.17.4 on Android. Affected by this vulnerability is an unknown functionality of the file AndroidManifest.xml of the component com.kakao.i.connect. The manipulation results in improper export of android application components. The attack requires a local approach. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

A deep link validation issue in KakaoTalk 10.4.3 allowed a remote adversary to direct users to run any attacker-controlled JavaScript within a WebView. The impact was further escalated by triggering another WebView that leaked its access token in a HTTP request header. Ultimately, this access token could be used to take over another user's account and read her/his chat messages.