CVE-2009-4355 Denial of service in n/a
Remote attackers can cause denial of service via memory consumption in OpenSSL's zlib compression handling, affecting systems using SSL/TLS.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2009-4355?
CVE-2009-4355 is a medium-severity denial of service vulnerability in Openssl Openssl, published on 14 Jan 2010. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Memory leak in the zlib_stateful_finish function in crypto/comp/c_zlib.c in OpenSSL 0.9.8l and earlier and 1.0.0 Beta through Beta 4 allows remote attackers to cause a denial of service (memory consumption) via vectors that trigger incorrect calls to the CRYPTO_cleanup_all_ex_data function, as demonstrated by use of SSLv3 and PHP with the Apache HTTP Server, a related issue to CVE-2008-1678.
Weakness: CWE-399
Which versions are affected by CVE-2009-4355?
It affects 2 products.
Products include Openssl Openssl, Redhat Openssl.
How do I fix CVE-2009-4355?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2009-4355 being exploited?
There is no known exploitation of CVE-2009-4355 in the wild and no public exploit code.
Other vulnerabilities in Openssl Openssl
Sources
Also known as DEBIAN-CVE-2009-4355, DSA-1970-1, GHSA-cg3r-vf2p-3f9h.