CVE-2018-11490

The DGifDecompressLine function in dgif_lib.c in GIFLIB (possibly version 3.0.x), as later shipped in cgif.c in sam2p 0.49.4, has a heap-based buffer overflow because a certain "Private->RunningCode - 2" array index is not checked. This will lead to a denial of service or possibly unspecified other impact.

Published: 2018-05-26 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-11490 is rated Moderate Risk (50/100): CVSS High severity, with low exploitation likelihood (EPSS 0.22%). 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-2018-11490

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 1.02% 0.22% -0.80%
2 2025-11-18 0.22% 1.02% +0.80%
3 2025-06-22 — 0.22% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-11490

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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: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: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.
 2.8 5.9 [email protected]
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/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:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2018-11490

OS Trackers for CVE-2018-11490

vendor priority summary link
debian not yet assigned CVE-2018-11490 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-2018-11490
redhat low — https://access.redhat.com/security/cve/CVE-2018-11490
suse high CVE-2018-11490 severity important: SUSE including 265 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, …), 336 product×package rows across 49 product lines (Container bci/openjdk, Container bci/openjdk-devel, … (49 product lines)): Known Affected 231, Fixed 101, Known Not Affected 4. https://www.suse.com/security/cve/CVE-2018-11490/
ubuntu low CVE-2018-11490 low priority: Ubuntu including 1 source packages (giflib), 7 status rows across 7 suites (artful, bionic, cosmic, disco, trusty, upstream, xenial): released 4, ignored 2, DNE 1. https://ubuntu.com/security/CVE-2018-11490

Affected software / configurations for CVE-2018-11490

Vendor Product Version Raw CPE
giflib_project giflib >= 3.0, <= 3.1.1 cpe:2.3:a:giflib_project:giflib:*:*:*:*:*:*:*:*
sam2p_project sam2p 0.49.4 cpe:2.3:a:sam2p_project:sam2p:0.49.4:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
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:*:*:*:*:*:*:*

References for CVE-2018-11490

URL Tags
http://www.securityfocus.com/bid/104327 Third Party Advisory VDB Entry
https://github.com/pts/sam2p/issues/38 Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/12/msg00008.html Mailing List Third Party Advisory
https://usn.ubuntu.com/4107-1/ Third Party Advisory
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