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CVE-2007-4990

7.5 · HIGH

The swap_char2b function in X.Org X Font Server (xfs) before 1.0.5 allows context-dependent attackers to execute arbitrary code via (1) QueryXBitmaps and (2) QueryXExtents protocol requests with cr…

Published Oct 5, 2007x.orgCWE-189EPSS 10.74%

Overview

CVE-2007-4990 is a high-severity vulnerability affecting x.org x_font_server. It was published on October 5, 2007 and has a CVSS 2.0 base score of 7.5 (HIGH).

This vulnerability has a CVSS 2.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The swap_char2b function in X.Org X Font Server (xfs) before 1.0.5 allows context-dependent attackers to execute arbitrary code via (1) QueryXBitmaps and (2) QueryXExtents protocol requests with crafted size values that specify an arbitrary number of bytes to be swapped on the heap, which triggers heap corruption.

Remediation

Check the references section for vendor advisories and patches from x.org. Update x_font_server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
x.orgx_font_server0Affected

References

Refbugs.freedesktop.org/show_bug.cgi?id=12299Refbugs.gentoo.org/show_bug.cgi?id=194606Refdocs.info.apple.com/article.html?artnum=307562Refh20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01323725Reflabs.idefense.com/intelligence/vulnerabilities/display.php?id=602Reflists.apple.com/archives/security-announce/2008/Mar/msg00001.htmlReflists.freedesktop.org/archives/xorg-announce/2007-October/000416.htmlRefsecunia.com/advisories/27040Refsecunia.com/advisories/27052Refsecunia.com/advisories/27060

How CyberStrike helps

Frequently asked questions

What is CVE-2007-4990?

CVE-2007-4990 is a high-severity vulnerability affecting x.org x_font_server. It was published on October 5, 2007 and has a CVSS 2.0 base score of 7.5 (HIGH).

How severe is CVE-2007-4990?

This vulnerability has a CVSS 2.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2007-4990?

Check the references section for vendor advisories and patches from x.org. Update x_font_server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2007-4990?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2007-4990 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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