Description
The BIND 4 and BIND 8.2.x stub resolver libraries, and other libraries such as glibc 2.2.5 and earlier, libc, and libresolv, use the maximum buffer size instead of the actual size when processing a DNS response, which causes the stub resolvers to read past the actual boundary ("read buffer overflow"), allowing remote attackers to cause a denial of service (crash).
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 | — |
| Debian 13 | glibc | 2.3 | — |
| Debian 12 | glibc | 2.3 | — |
References
- CLA-2002:535 vendor-advisory
- RHSA-2003:212 vendor-advisory
- RHSA-2002:197 vendor-advisory
- RHSA-2002:258 vendor-advisory
- RHSA-2003:022 vendor-advisory
- VU#738331 third-party-advisory
- MDKSA-2004:009 vendor-advisory
- dns-resolver-lib-read-bo(10295) vdb-entry