Vulnerability Database

383,371

Total vulnerabilities in the database

CVE-2008-0553 — tcl_tk / tcl_tk

Improper Restriction of Operations within the Bounds of a Memory Buffer

Stack-based buffer overflow in the ReadImage function in tkImgGIF.c in Tk (Tcl/Tk) before 8.5.1 allows remote attackers to execute arbitrary code via a crafted GIF image, a similar issue to CVE-2006-4484.

  • Published: Feb 7, 2008
  • Updated: Sep 13, 2026
  • CVE: CVE-2008-0553
  • Severity: Medium
  • Exploit:
  • CISA KEV:

CVSS v2:

  • Severity: Medium
  • Score: 6.8
  • AV:N/AC:M/Au:N/C:P/I:P/A:P

CWEs:

Software Affected versions
tcl_tk / tcl_tk <= 8.4.17
tcl_tk / tcl_tk = 2.1
tcl_tk / tcl_tk = 3.3
tcl_tk / tcl_tk = 4.0p1
tcl_tk / tcl_tk = 6.1
tcl_tk / tcl_tk = 6.1p1
tcl_tk / tcl_tk = 6.2
tcl_tk / tcl_tk = 6.4
tcl_tk / tcl_tk = 6.5
tcl_tk / tcl_tk = 6.6
tcl_tk / tcl_tk = 6.7
tcl_tk / tcl_tk = 7.0
tcl_tk / tcl_tk = 7.1
tcl_tk / tcl_tk = 7.3
tcl_tk / tcl_tk = 7.4
tcl_tk / tcl_tk = 7.5
tcl_tk / tcl_tk = 7.5p1
tcl_tk / tcl_tk = 7.6
tcl_tk / tcl_tk = 7.6p2
tcl_tk / tcl_tk = 8.0
tcl_tk / tcl_tk = 8.0.3
tcl_tk / tcl_tk = 8.0.4
tcl_tk / tcl_tk = 8.0.5
tcl_tk / tcl_tk = 8.0p2
tcl_tk / tcl_tk = 8.1
tcl_tk / tcl_tk = 8.1.1
tcl_tk / tcl_tk = 8.2.0
tcl_tk / tcl_tk = 8.2.1
tcl_tk / tcl_tk = 8.2.2
tcl_tk / tcl_tk = 8.2.3
tcl_tk / tcl_tk = 8.3.0
tcl_tk / tcl_tk = 8.3.1
tcl_tk / tcl_tk = 8.3.2
tcl_tk / tcl_tk = 8.3.3
tcl_tk / tcl_tk = 8.3.4
tcl_tk / tcl_tk = 8.3.5
tcl_tk / tcl_tk = 8.4.0
tcl_tk / tcl_tk = 8.4.1
tcl_tk / tcl_tk = 8.4.2
tcl_tk / tcl_tk = 8.4.3
tcl_tk / tcl_tk = 8.4.4
tcl_tk / tcl_tk = 8.4.5
tcl_tk / tcl_tk = 8.4.6
tcl_tk / tcl_tk = 8.4.7
tcl_tk / tcl_tk = 8.4.8
tcl_tk / tcl_tk = 8.4.9
tcl_tk / tcl_tk = 8.4.10
tcl_tk / tcl_tk = 8.4.11
tcl_tk / tcl_tk = 8.4.12
tcl_tk / tcl_tk = 8.4.13
tcl_tk / tcl_tk = 8.4.14
tcl_tk / tcl_tk = 8.4.15
tcl_tk / tcl_tk = 8.4.16
tcl_tk / tcl_tk = 8.4a2
tcl_tk / tcl_tk = 8.4a3
tcl_tk / tcl_tk = 8.4a4
tcl_tk / tcl_tk = 8.4b1
tcl_tk / tcl_tk = 8.4b2
tcl_tk / tcl_tk = 8.5.0
tcl_tk / tcl_tk = 8.5_a3
tcl_tk / tcl_tk = 8.5a1
tcl_tk / tcl_tk = 8.5a2
tcl_tk / tcl_tk = 8.5a3
tcl_tk / tcl_tk = 8.5a4
tcl_tk / tcl_tk = 8.5a5
tcl_tk / tcl_tk = 8.5a6
tcl_tk / tcl_tk = 8.5b1
tcl_tk / tcl_tk = 8.5b2
tcl_tk / tcl_tk = 8.5b3

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.