Vulnerability Information
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Vulnerability Title
Incorrect parsing of access level in gomatrixserverlib and dendrite
Vulnerability Description
gomatrixserverlib is a Go library for matrix protocol federation. Dendrite is a Matrix homeserver written in Go, an alternative to Synapse. The power level parsing within gomatrixserverlib was failing to parse the `"events_default"` key of the `m.room.power_levels` event, defaulting the event default power level to zero in all cases. Power levels are the matrix terminology for user access level. In rooms where the `"events_default"` power level had been changed, this could result in events either being incorrectly authorised or rejected by Dendrite servers. gomatrixserverlib contains a fix as of commit `723fd49` and Dendrite 0.9.3 has been updated accordingly. Matrix rooms where the `"events_default"` power level has not been changed from the default of zero are not vulnerable. Users are advised to upgrade. There are no known workarounds for this issue.
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Vulnerability Type
授权机制不正确
Vulnerability Title
gomatrixserverlib 安全漏洞
Vulnerability Description
gomatrixserverlib是matrix.org开源的一个 Go 库。用于矩阵服务器所需的常用功能。 gomatrixserverlib存在安全漏洞，该漏洞源于其电源等级解析程序无法解析“m.room.power_leavels事件”的“events_default”关键字导致在所有情况下会将默认电源等级设置为0。
CVSS Information
N/A
Vulnerability Type
N/A