CVE-2019-20387

repodata_schema2id in repodata.c in libsolv before 0.7.6 has a heap-based buffer over-read via a last schema whose length is less than the length of the input schema.

Published: 2020-01-21 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-20387 is rated Moderate Risk (45.5/100): CVSS High severity, with low exploitation likelihood (EPSS 0.23%). 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-2019-20387

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 2025-11-21 0.77% 0.23% -0.54%
2 2025-11-18 0.23% 0.77% +0.54%
3 2025-08-30 — 0.23% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-20387

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/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-2019-20387

OS Trackers for CVE-2019-20387

vendor priority summary link
debian not yet assigned CVE-2019-20387 not yet assigned priority: Debian including 1 source packages (libsolv), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-20387
redhat medium — https://access.redhat.com/security/cve/CVE-2019-20387
suse low CVE-2019-20387 severity low: SUSE including 261 source package names (24.284:libsolv-tools-0.6.37-2.33.1, 24.284:libzypp-16.21.4-2.51.1, …), 410 product×package rows across 46 product lines (Container suse/ltss/sle12.5/sles12sp5, Container suse/sles12sp3, … (46 product lines)): Known Affected 231, Fixed 170, Known Not Affected 9. https://www.suse.com/security/cve/CVE-2019-20387/
ubuntu medium CVE-2019-20387 medium priority: Ubuntu including 1 source packages (libsolv), 17 status rows across 17 suites (bionic, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 12, needed 2, DNE 1, ignored 1, released 1. https://ubuntu.com/security/CVE-2019-20387

Affected software / configurations for CVE-2019-20387

Vendor Product Version Raw CPE
opensuse libsolv < 0.7.6 cpe:2.3:a:opensuse:libsolv:*:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

References for CVE-2019-20387

cvelogic Threat Intelligence