The iwgif_read_image function in imagew-gif.c in libimageworsener.a in ImageWorsener 1.3.0 allows remote attackers to cause a denial of service (divide-by-zero error and application crash) via a crafted file.
Conclusion & alert: CVE-2017-7962 is rated High Exploit Risk (60/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.50%). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
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 | 0.26% | 0.50% | +0.24% |
| 2 | 2025-11-18 | 0.50% | 0.26% | -0.24% |
| 3 | 2025-10-06 | — | 0.50% | — |
Full EPSS history (11 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.5 | 3.0 | MEDIUM |
|
1.8 | 3.6 | [email protected] |
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
gentoo
|
normal | CVE-2017-7962: 1 GLSA(s) (201706-06), 1 atom(s) (media-gfx/imageworsener); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2017-7962 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| entropymine | imageworsener | 1.3.0 | cpe:2.3:a:entropymine:imageworsener:1.3.0:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| https://blogs.gentoo.org/ago/2017/04/17/imageworsener-divide-by-zero-in-iwgif_record_pixel-imagew-gif-c/ | Exploit Patch Third Party Advisory |
| https://github.com/jsummers/imageworsener/commit/ca3356eb49fee03e2eaf6b6aff826988c1122d93 | Patch Third Party Advisory |
| https://github.com/jsummers/imageworsener/issues/15 | Issue Tracking Patch Vendor Advisory |
| https://security.gentoo.org/glsa/201706-06 | Third Party Advisory |