CVE-2019-8921

NameCVE-2019-8921
DescriptionAn issue was discovered in bluetoothd in BlueZ through 5.48. The vulnerability lies in the handling of a SVC_ATTR_REQ by the SDP implementation. By crafting a malicious CSTATE, it is possible to trick the server into returning more bytes than the buffer actually holds, resulting in leaking arbitrary heap data. The root cause can be found in the function service_attr_req of sdpd-request.c. The server does not check whether the CSTATE data is the same in consecutive requests, and instead simply trusts that it is the same.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2827-1, DLA-3157-1, ELA-522-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
bluez (PTS)jessie, jessie (lts)5.43-2+deb9u2~deb8u6fixed
stretch (security)5.43-2+deb9u5fixed
stretch (lts), stretch5.43-2+deb9u7fixed
buster5.50-1.2~deb10u2vulnerable
buster (security)5.50-1.2~deb10u4fixed
bullseye (security), bullseye5.55-3.1+deb11u1fixed
bookworm (security), bookworm5.66-1+deb12u1fixed
sid, trixie5.71-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
bluezsourcejessie5.43-2+deb9u2~deb8u4ELA-522-1
bluezsourcestretch5.43-2+deb9u5DLA-2827-1
bluezsourcebuster5.50-1.2~deb10u3DLA-3157-1
bluezsource(unstable)5.54-1

Notes

https://ssd-disclosure.com/ssd-advisory-linux-bluez-information-leak-and-heap-overflow/
https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=7bf67b32709d828fafa26256b4c78331760c6e93 (5.51)

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