未評価
The olm_session_describe function in Matrix libolm before 3.2.7 is vulnerable to a buffer overflow. The Olm session object represents a cryptographic...
CVE-2021-44538
SecPulse初出
ディストリビューション別の修正状況
各ディストリビューションが公開している、この CVE の修正パッケージ
- Debian DEBIAN-CVE-2021-44538 olm 修正版: 3.2.8~dfsg-1
- Ubuntu UBUNTU-CVE-2021-44538 thunderbird 修正版: 1:91.5.0+build1-0ubuntu0.18.04.1
原文の説明 取得元が公開している説明をそのまま載せています (多くは英語)。
The olm_session_describe function in Matrix libolm before 3.2.7 is vulnerable to a buffer overflow. The Olm session object represents a cryptographic channel between two parties. Therefore, its state is partially controllable by the remote party of the channel. Attackers can construct a crafted sequence of messages to manipulate the state of the receiver's session in such a way that, for some buffer sizes, a buffer overflow happens on a call to olm_session_describe. Furthermore, safe buffer sizes were undocumented. The overflow content is partially controllable by the attacker and limited to ASCII spaces and digits. The known affected products are Element Web And SchildiChat Web.
参照URL
- advisory gitlab.matrix.org
- advisory lists.debian.org
- advisory debian.org
- patch matrix.org