A heap-based buffer over-read vulnerability was found in the X.org server’s ProcXIPassiveGrabDevice() function. This issue occurs when byte-swapped length values are used in replies, potentially leading to memory leakage and segmentation faults, particularly when triggered by a client with a different endianness. This vulnerability could be exploited by an attacker to cause the X server to read heap memory values and then transmit them back to the client until encountering an unmapped page, resulting in a crash. Despite the attacker’s inability to control the specific memory copied into the replies, the small length values typically stored in a 32-bit integer can result in significant attempted out-of-bounds reads.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Alpine | edge-community | noarch | xorg-server | < 21.1.12-r0 | UNKNOWN |
Alpine | edge-community | noarch | xwayland | < 23.2.5-r0 | UNKNOWN |
Alpine | 3.19-community | noarch | xorg-server | < 21.1.12-r0 | UNKNOWN |
Alpine | 3.19-community | noarch | xwayland | < 23.2.5-r0 | UNKNOWN |
Alpine | 3.20-community | noarch | xorg-server | < 21.1.12-r0 | UNKNOWN |
Alpine | 3.20-community | noarch | xwayland | < 23.2.5-r0 | UNKNOWN |