CVE-2013-6369
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedStack-based buffer overflow in the jbg_dec_in function in libjbig/jbig.c in JBIG-KIT before 2.1 allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via a crafted image file.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceA stack-based buffer overflow vulnerability exists in the jbg_dec_in function in libjbig/jbig.c of JBIG-KIT versions prior to 2.1. The vulnerability is triggered when processing a specially crafted image file, allowing remote attackers to potentially execute arbitrary code or cause a denial of service via application crash.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data<= 2.0= 0.5= 0.6= 0.7= 0.8= 0.9= 1.0= 1.1= 1.2= 1.3= 1.4= 1.5CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- M
- Authentication
- None
- Confidentiality
- Partial
- Integrity
- Partial
- Availability
- Partial
AV:N/AC:M/Au:N/C:P/I:P/A:P
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify JBIG-KIT installation and versionRun 'jbig -v' or 'jbig --version' if the command-line tool is installed. Alternatively, search for library files: 'find /usr -name "*jbig*" 2>/dev/null' and check any version files or examine the library binary with 'strings libjbig.so 2>/dev/null | grep -i version'Affected if The installed version is 2.0 or earlier, or matches any of these specific versions: 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, or 1.5
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Locate the vulnerable library source or binarySearch for libjbig/jbig.c or compiled library files: 'find / -path "*/libjbig*" -o -path "*/jbig.c" 2>/dev/null' or check common library directories '/usr/lib/', '/usr/local/lib/' for 'libjbig.so' or 'libjbig.a'Affected if The library file exists and was built from a JBIG-KIT version 2.0 or earlier
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Identify applications using the JBIG libraryRun 'ldd /path/to/application | grep jbig' on suspected applications, or use 'grep -r "jbig" /proc/*/maps 2>/dev/null' to find running processes with libjbig loaded. Check package manager: 'dpkg -l | grep jbig' or 'rpm -qa | grep jbig'Affected if Any application on the system links to and uses the JBIG-KIT library
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Verify the jbg_dec_in function is presentIf the library binary exists, inspect it with 'nm libjbig.so | grep jbg_dec_in' or 'objdump -T libjbig.so | grep jbg_dec_in' to confirm the vulnerable function is present in the compiled libraryAffected if The jbg_dec_in symbol exists in the library, indicating the vulnerable code path is present
A system is affected if JBIG-KIT version 2.0 or earlier (including specific versions 0.5 through 1.5) is installed and any application uses the library to process image files.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpgrade JBIG-KIT to version 2.1 or later to remediate this vulnerability. Additionally, validate and sanitize all image files processed by applications using this library before passing them to the decoding function.
- Consultation2.0 h
- Implementation2.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2013-6369 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2013-6369 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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