CVE-2020-5202
apt-cacher-ng through 3.3 allows local users to obtain sensitive information by hijacking the hardcoded TCP port.
Does this matter?
Lower severity and a low EPSS score (0.47%). Track it; it rarely justifies an emergency change on its own.
Description
apt-cacher-ng through 3.3 allows local users to obtain sensitive information by hijacking the hardcoded TCP port. The /usr/lib/apt-cacher-ng/acngtool program attempts to connect to apt-cacher-ng via TCP on localhost port 3142, even if the explicit SocketPath=/var/run/apt-cacher-ng/socket command-line option is passed. The cron job /etc/cron.daily/apt-cacher-ng (which is active by default) attempts this periodically. Because 3142 is an unprivileged port, any local user can try to bind to this port and will receive requests from acngtool. There can be sensitive data in these requests, e.g., if AdminAuth is enabled in /etc/apt-cacher-ng/security.conf. This sensitive data can leak to unprivileged local users that manage to bind to this port before the apt-cacher-ng daemon can.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.47% probability · 40th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- apt-cacher-ng project/apt-cacher-ng · debian/debian linux · opensuse/backports · opensuse/leap
- Source
- cve@mitre.org
EPSS 0.5% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00057.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00065.htmlMailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/01/20/4Exploit, Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/01/20/4Exploit, Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/01/20/4Exploit, Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/01/20/4Exploit, Mailing List, Third Party Advisory
- https://seclists.org/oss-sec/2020/q1/21Exploit, Mailing List, Third Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2020-5202Patch, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00057.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00065.htmlMailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/01/20/4Exploit, Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/01/20/4Exploit, Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/01/20/4Exploit, Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/01/20/4Exploit, Mailing List, Third Party Advisory
- https://seclists.org/oss-sec/2020/q1/21Exploit, Mailing List, Third Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2020-5202Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.