CVE-2019-15133

In GIFLIB before 2019-02-16, a malformed GIF file triggers a divide-by-zero exception in the decoder function DGifSlurp in dgif_lib.c if the height field of the ImageSize data structure is equal to zero.

Published: 2019-08-17 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-15133 is rated Moderate Risk (51.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.54%). 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-2019-15133

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 1.30% 1.54% +0.24%
2 2026-04-27 0.19% 1.30% +1.11%
3 2025-11-21 — 0.19% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-15133

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
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]
4.3 2.0 MEDIUM
AV:N/AC:M/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:M)
Exploitation needs some favorable conditions, but not exceptional ones.
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.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2019-15133

OS Trackers for CVE-2019-15133

vendor priority summary link
debian not yet assigned CVE-2019-15133 not yet assigned priority: Debian including 1 source packages (giflib), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-15133
redhat low — https://access.redhat.com/security/cve/CVE-2019-15133
suse medium CVE-2019-15133 severity moderate: SUSE including 258 source package names (10.1.33-openjdk11-59.4:libgif7-5.2.1-150000.4.8.1, 10.1.33-openjdk17-59.4:libgif7-5.2.1-150000.4.8.1, …), 319 product×package rows across 43 product lines (Container bci/openjdk, Container bci/openjdk-devel, … (43 product lines)): Known Affected 231, Fixed 88. https://www.suse.com/security/cve/CVE-2019-15133/
ubuntu medium CVE-2019-15133 medium priority: Ubuntu including 1 source packages (giflib), 5 status rows across 5 suites (bionic, disco, trusty, upstream, xenial): released 4, DNE 1. https://ubuntu.com/security/CVE-2019-15133

Affected software / configurations for CVE-2019-15133

Vendor Product Version Raw CPE
giflib_project giflib < 5.1.7 cpe:2.3:a:giflib_project:giflib:*:*:*:*:*:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 19.04 cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

References for CVE-2019-15133

cvelogic Threat Intelligence