CVE-2020-7039

2020-01-1600:00:00

ubuntu.com

cve-2020-7039

qemu 4.2.0

memory mismanagement

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS3

5.6

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS

0.004

Percentile

72.3%

JSON

tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in QEMU 4.2.0, mismanages
memory, as demonstrated by IRC DCC commands in EMU_IRC. This can cause a
heap-based buffer overflow or other out-of-bounds access which can lead to
a DoS or potential execute arbitrary code.

Notes

Author	Note
mdeslaur	possible better approach would be to disable tcp_emu completely https://gitlab.freedesktop.org/slirp/libslirp/commit/07c2a44b67e219ac14207f7a1b33704e1312cf91

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchqemu< 1:2.11+dfsg-1ubuntu7.23UNKNOWN
ubuntu19.10noarchqemu< 1:4.0+dfsg-0ubuntu9.4UNKNOWN
ubuntu14.04noarchqemu< anyUNKNOWN
ubuntu16.04noarchqemu< 1:2.5+dfsg-5ubuntu10.43UNKNOWN
ubuntu18.04noarchslirp< 1:1.0.17-8ubuntu18.04.1UNKNOWN
ubuntu14.04noarchslirp< 1:1.0.17-7+deb8u2build0.14.04.1+esm1UNKNOWN
ubuntu16.04noarchslirp< 1:1.0.17-8ubuntu16.04.1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	qemu	< 1:2.11+dfsg-1ubuntu7.23	UNKNOWN
ubuntu	19.10	noarch	qemu	< 1:4.0+dfsg-0ubuntu9.4	UNKNOWN
ubuntu	14.04	noarch	qemu	< any	UNKNOWN
ubuntu	16.04	noarch	qemu	< 1:2.5+dfsg-5ubuntu10.43	UNKNOWN
ubuntu	18.04	noarch	slirp	< 1:1.0.17-8ubuntu18.04.1	UNKNOWN
ubuntu	14.04	noarch	slirp	< 1:1.0.17-7+deb8u2build0.14.04.1+esm1	UNKNOWN
ubuntu	16.04	noarch	slirp	< 1:1.0.17-8ubuntu16.04.1	UNKNOWN