zlib: Denial of service vulnerability

1. Gentoo Linux Security Advisory

Package	Vulnerable versions	Unaffected versions	Architecture(s)
sys-libs/zlib	<= 1.2.1-r2	>= 1.2.1-r3	All supported architectures

Related bugreports: #61749

The zlib library contains a Denial of Service vulnerability.

2. Impact Information

zlib is a general-purpose data-compression library.

zlib contains a bug in the handling of errors in the "inflate()" and "inflateBack()" functions.

An attacker could exploit this vulnerability to launch a Denial of Service attack on any application using the zlib library.

3. Resolution Information

There is no known workaround at this time. All users are encouraged to upgrade to the latest available version of zlib.

All zlib users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge sync

# emerge -pv ">=sys-libs/zlib-1.2.1-r3"
# emerge ">=sys-libs/zlib-1.2.1-r3"

You should also run revdep-rebuild to rebuild any packages that depend on older versions of zlib :

Code Listing 3.2: Resolution

# revdep-rebuild

4. References

Updated August 27, 2004

Summary: This is a Gentoo Linux Security Advisory

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