CVE-2020-1700 [Medium] | Denial of Service in Ceph

A flaw was found in the way the Ceph RGW Beast front-end handles unexpected disconnects. An authenticated attacker can abuse this flaw by making multiple disconnect attempts resulting in a permanent leak of a socket connection by radosgw. This flaw could lead to a denial of service condition by pile up of CLOSE_WAIT sockets, eventually leading to the exhaustion of available resources, preventing legitimate users from connecting to the system.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-12-20	0.36%	0.33%	-0.03%
2	2025-12-19	0.52%	0.36%	-0.17%
3	2025-11-21	—	0.52%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-12-20

0.36%

0.33%

-0.03%

2025-12-19

0.52%

0.36%

-0.17%

2025-11-21

—

0.52%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
6.5	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	2.8	3.6	[email protected]
6.5	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	2.8	3.6	[email protected]
6.8	2.0	MEDIUM	`AV:N/AC:L/Au:S/C:N/I:N/A:C` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:S) A single authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:C) Complete availability impact.	8.0	6.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

6.5

3.1

MEDIUM

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

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

2.8

3.6

[email protected]

6.5

3.1

MEDIUM

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

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

2.8

3.6

[email protected]

6.8

2.0

MEDIUM

AV:N/AC:L/Au:S/C:N/I:N/A:C Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:S): A single authentication is required.
Confidentiality impact (C:N): No confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:C): Complete availability impact.

8.0

6.9

[email protected]

OS Trackers for CVE-2020-1700

vendor	priority	summary	link
`alpine`	medium	CVE-2020-1700: 2 source package rows (ceph, ceph16); 4 state rows across 3 repos (3.17-community, 3.18-community, edge-community); fixed 4, open 0.	https://security.alpinelinux.org/vuln/CVE-2020-1700
`debian`	not yet assigned	CVE-2020-1700 not yet assigned priority: Debian including 1 source packages (ceph), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2020-1700
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2020-1700
`suse`	medium	CVE-2020-1700 severity moderate: SUSE including 168 source package names (1.1.1.0.1.5.110:ceph-14.2.5.382+g8881d33957-3.14.1, 1.1.1.0.1.5.110:ceph-base-14.2.5.382+g8881d33957-3.14.1, …), 306 product×package rows across 31 product lines (Container caasp/v4/hyperkube, Container ses/6/cephcsi/cephcsi, … (31 product lines)): Fixed 154, Known Not Affected 152.	https://www.suse.com/security/cve/CVE-2020-1700/
`ubuntu`	medium	CVE-2020-1700 medium priority: Ubuntu including 1 source packages (ceph), 6 status rows across 6 suites (bionic, disco, eoan, trusty, upstream, xenial): released 3, not-affected 2, ignored 1.	https://ubuntu.com/security/CVE-2020-1700

Affected software / configurations for CVE-2020-1700

Vendor	Product	Version	Raw CPE
ceph	ceph	—	cpe:2.3:a:ceph:ceph:-:::::::*
redhat	openshift_container_storage	4.2	cpe:2.3:a:redhat:openshift_container_storage:4.2:::::::*
opensuse	leap	15.1	cpe:2.3:o:opensuse:leap:15.1:::::::*
canonical	ubuntu_linux	18.04	cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::
canonical	ubuntu_linux	19.10	cpe:2.3:o:canonical:ubuntu_linux:19.10:::::::*

References for CVE-2020-1700

URL	Tags
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00009.html	Mailing List Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1700	Issue Tracking Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00034.html
https://usn.ubuntu.com/4304-1/	Third Party Advisory

URL

CVE-2020-1700

Exploit prediction scoring system (EPSS) score for CVE-2020-1700

Common vulnerability scoring system (CVSS) metrics for CVE-2020-1700

Weakness enumeration for CVE-2020-1700

OS Trackers for CVE-2020-1700

Affected software / configurations for CVE-2020-1700

References for CVE-2020-1700