CVE-2017-15923

Konversation 1.4.x, 1.5.x, 1.6.x, and 1.7.x before 1.7.3 allow remote attackers to cause a denial of service (crash) via vectors related to parsing of IRC color formatting codes.

Published: 2017-11-15 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-15923 is rated Moderate Risk (61.4/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.73%). EPSS rose +1.94% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2017-15923

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.79% 2.73% +1.94%
2 2026-04-11 1.48% 0.79% -0.68%
3 2025-03-30 — 1.48% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-15923

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/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:N)
No account or special rights needed—anonymous or random user is enough.
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.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P 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:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2017-15923

OS Trackers for CVE-2017-15923

vendor priority summary link
debian not yet assigned CVE-2017-15923 not yet assigned priority: Debian including 1 source packages (konversation), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2017-15923
suse medium CVE-2017-15923 severity moderate: SUSE including 10 source package names (konversation-1.7.4-lp150.2.1, konversation-1.7.5-bp153.1.25, …), 10 product×package rows across 5 product lines (openSUSE Leap 15.0, openSUSE Leap 15.2, … (5 product lines)): Fixed 10. https://www.suse.com/security/cve/CVE-2017-15923/
ubuntu low CVE-2017-15923 low priority: Ubuntu including 1 source packages (konversation), 5 status rows across 5 suites (artful, trusty, upstream, xenial, zesty): released 5. https://ubuntu.com/security/CVE-2017-15923

Affected software / configurations for CVE-2017-15923

Vendor Product Version Raw CPE
konversation konversation >= 1.4, < 1.7.3 cpe:2.3:a:konversation:konversation:*:*:*:*:*:*:*:*
debian debian_linux 7.0 cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

References for CVE-2017-15923

cvelogic Threat Intelligence