Description
The catchsegv script in glibc 2.3.2 and earlier allows local users to overwrite files via a symlink attack on temporary files.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | glibc | 2.3.2.ds1-19 | — |
| Debian 13 | glibc | 2.3.2.ds1-19 | — |
| Debian 12 | glibc | 2.3.2.ds1-19 | — |
| Debian 3.0 | glibc | 2.2.5-11.8 | DSA-636-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 3 | nscd +8 | 2.3.2-95.30 | RHSA-2004:586 |
Advisories 2
- RHSA-2004:586 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-636-1 glibc - insecure temporary files Debian Security (DSA / DLA) · Mar 9, 2026
References
- DSA-636 vendor-advisory
- oval:org.mitre.oval:def:9523 vdb-entry signature
- RHSA-2005:261 vendor-advisory
- script-temporary-file-overwrite(17583) vdb-entry
- 11286 vdb-entry
- USN-4-1 vendor-advisory
- GLSA-200410-19 vendor-advisory
- 2004-0050 vendor-advisory
- http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=136318
- RHSA-2004:586 vendor-advisory