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)…

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.

Scores

EPSS (exploitation in 30 days)

10.7% · top 4.2% of all CVEs (3 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

• n/a
• CWE-189 (opens in a new tab)All about CWE-189 and its CVEs

Affected products

• n/a

  • affected n/a

References (38)

• SUSE-SA:2007:054 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• 1018763 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• 28542 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 200642 (opens in a new tab)vendor-advisoryx_refsource_SUNALERTx_transferred
• FEDORA-2007-4263 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• 20071003 rPSA-2007-0205-1 xorg-x11 xorg-x11-fonts xorg-x11-tools xorg-x11-xfs (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• http://bugs.freedesktop.org/show_bug.cgi?id=12299 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 28514 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 27052 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 20071002 Multiple Vendor X Font Server Multiple Vulnerabilities (opens in a new tab)third-party-advisoryx_refsource_IDEFENSEx_transferred
• 27060 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• ADV-2008-0924 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• HPSBUX02303 (opens in a new tab)vendor-advisoryx_refsource_HPx_transferred
• [xorg-announce] 20071002 [ANNOUNCE] X.Org security advisory: multiple vulnerabilities in X font server (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• RHSA-2008:0029 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• 28004 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 27240 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• https://issues.rpath.com/browse/RPL-1756 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 29420 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 27040 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• APPLE-SA-2008-03-18 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
• 27176 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• GLSA-200710-11 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
• 27228 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• ADV-2007-3467 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• RHSA-2008:0030 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• 103114 (opens in a new tab)vendor-advisoryx_refsource_SUNALERTx_transferred
• ADV-2008-0149 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• MDKSA-2007:210 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
• 25898 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• http://bugs.gentoo.org/show_bug.cgi?id=194606 (opens in a new tab)x_refsource_CONFIRMx_transferred
• ADV-2007-3338 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• 27560 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• oval:org.mitre.oval:def:11599 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
• http://docs.info.apple.com/article.html?artnum=307562 (opens in a new tab)x_refsource_CONFIRMx_transferred
• ADV-2007-3337 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• xfs-queryxbitmaps-queryxextents-bo(36920) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
• 28536 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2007-4990](https://trackcve.app/badge/CVE-2007-4990.svg)](https://trackcve.app/cve/CVE-2007-4990)

Record last updated 7 Aug 2024, 15:17 UTC.