CVE-2015-0843

yubiserver before 0.6 is prone to buffer overflows due to misuse of sprintf.

Published: 2025-06-26 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-0843 is rated Moderate Risk (49.7/100): CVSS Critical severity, with low exploitation likelihood (EPSS 0.39%). 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-2015-0843

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 0.60% 0.39% -0.21%
2 2026-04-22 0.17% 0.60% +0.43%
3 2026-04-12 — 0.17% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-0843

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2015-0843

OS Trackers for CVE-2015-0843

vendor priority summary link
debian not yet assigned CVE-2015-0843 not yet assigned priority: Debian including 1 source packages (yubiserver), 3 status rows across 3 suites (bookworm, bullseye, trixie): resolved 3. https://security-tracker.debian.org/tracker/CVE-2015-0843
ubuntu medium CVE-2015-0843 medium priority: Ubuntu including 1 source packages (yubiserver), 13 status rows across 13 suites (artful, bionic, cosmic, disco, precise, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): ignored 7, not-affected 4, DNE 1, released 1. https://ubuntu.com/security/CVE-2015-0843

Affected software / configurations for CVE-2015-0843

Vendor Product Version Raw CPE
debian yubiserver 0.2-2 cpe:2.3:a:debian:yubiserver:0.2-2:*:*:*:*:*:*:*
debian yubiserver 0.5-2 cpe:2.3:a:debian:yubiserver:0.5-2:*:*:*:*:*:*:*

References for CVE-2015-0843

URL Tags
http://www.include.gr/debian/yubiserver/#changelog Release Notes
https://bugs.debian.org/796495 Issue Tracking Mailing List Vendor Advisory
cvelogic Threat Intelligence