| Package | bluez |
|---|---|
| Version | 5.43-2+deb9u2~deb8u4 |
| Related CVEs | CVE-2019-8921 CVE-2019-8922 CVE-2021-41229 |
Several vulnerabilities were discovered in BlueZ, the Linux Bluetooth protocol stack. An attacker could cause a denial-of-service (DoS) or leak information.
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CVE-2019-8921
SDP infoleak; the vulnerability lies in the handling of a SVC_ATTR_REQ by the SDP implementation of BlueZ. 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.
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CVE-2019-8922
SDP Heap Overflow; this vulnerability lies in the SDP protocol handling of attribute requests as well. By requesting a huge number of attributes at the same time, an attacker can overflow the static buffer provided to hold the response.
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CVE-2021-41229
sdp_cstate_alloc_buf allocates memory which will always be hung in the singly linked list of cstates and will not be freed. This will cause a memory leak over time. The data can be a very large object, which can be caused by an attacker continuously sending sdp packets and this may cause the service of the target device to crash.
For Debian 8 jessie, these problems have been fixed in version 5.43-2+deb9u2~deb8u4.
We recommend that you upgrade your bluez packages.
Further information about Extended LTS security advisories can be found in the dedicated section of our website.