| Name | CVE-2020-10761 |
| Description | An assertion failure issue was found in the Network Block Device(NBD) Server in all QEMU versions before QEMU 5.0.1. This flaw occurs when an nbd-client sends a spec-compliant request that is near the boundary of maximum permitted request length. A remote nbd-client could use this flaw to crash the qemu-nbd server resulting in a denial of service. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| qemu (PTS) | buster | 1:3.1+dfsg-8+deb10u8 | fixed |
| buster (security) | 1:3.1+dfsg-8+deb10u10 | fixed | |
| bullseye (security), bullseye | 1:5.2+dfsg-11+deb11u2 | fixed | |
| bookworm | 1:7.2+dfsg-4 | fixed | |
| sid | 1:7.2+dfsg-5 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| qemu | source | jessie | (not affected) | |||
| qemu | source | stretch | (not affected) | |||
| qemu | source | buster | (not affected) | |||
| qemu | source | (unstable) | 1:5.0-6 |
[buster] - qemu <not-affected> (Vulnerable code introduced later)
[stretch] - qemu <not-affected> (Vulnerable code introduced later)
[jessie] - qemu <not-affected> (Vulnerable code introduced later)
https://www.openwall.com/lists/oss-security/2020/06/09/1
Proposed upstream patch: https://lists.gnu.org/archive/html/qemu-devel/2020-06/msg02031.html
Fixed by: https://git.qemu.org/?p=qemu.git;a=commit;h=5c4fe018c025740fef4a0a4421e8162db0c3eefd
Introduced in: https://git.qemu.org/?p=qemu.git;a=commit;h=93676c88d7a5cd5971de94f9091eff8e9773b1af