What’s Vulnerable › Vulnerabilities
CVE-2020-7039
- Severity: medium (CVSS 5.6 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 3.6% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2020-01-16 · updated 2026-06-17
- Weakness: CWE-787
Description
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.
Affected products
- Debian Linux: 8.0, 9.0
- Libslirp Project Libslirp: 4.1.0
- openSUSE Leap: 15.1
- QEMU: 4.2.0
References
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00007.html
- http://www.openwall.com/lists/oss-security/2020/01/16/2
- https://access.redhat.com/errata/RHSA-2020:0348
- https://access.redhat.com/errata/RHSA-2020:0775
- https://gitlab.freedesktop.org/slirp/libslirp/commit/2655fffed7a9e765bcb4701dd876e9dab975f289
- https://gitlab.freedesktop.org/slirp/libslirp/commit/82ebe9c370a0e2970fb5695aa19aa5214a6a1c80
- https://gitlab.freedesktop.org/slirp/libslirp/commit/ce131029d6d4a405cb7d3ac6716d03e58fb4a5d9
- https://lists.debian.org/debian-lts-announce/2020/01/msg00022.html
- https://lists.debian.org/debian-lts-announce/2020/01/msg00036.html
- https://lists.debian.org/debian-lts-announce/2021/02/msg00012.html
- https://seclists.org/bugtraq/2020/Feb/0
- https://security.gentoo.org/glsa/202005-02
Get alerted when CVE-2020-7039 or the next vulnerability affects your stack