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CVE-2009-4355

Memory leak in the zlib_stateful_finish function in crypto/comp/c_zlib.c in OpenSSL 0.9.8l and...

5.0 MediumFix available

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.

Exploit likelihood

9.18%Up 1.6 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 5.0

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.

Record
CVE-2009-4355
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-399
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2009-4355
Updated
2026-11-02
EUVDEUVD-2009-4323 No score

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.

Record
EUVD-2009-4323
Updated
2026-11-03
GitHub AdvisoriesGHSA-cg3r-vf2p-3f9h No score

Memory leak in the zlib_stateful_finish function in crypto/comp/c_zlib.c in OpenSSL 0.9.8l and...

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.

Record
GHSA-cg3r-vf2p-3f9h
Updated
2026-11-02
OSV No score

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.

Record
CVE-2009-4355
Updated
2026-11-02
OSVDEBIAN-CVE-2009-4355 No score

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.

Record
DEBIAN-CVE-2009-4355
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
openssl
Debian:12
 before 0.9.8k-8
0.9.8k-8
openssl
Debian:13
 before 0.9.8k-8
0.9.8k-8
openssl
Debian:14
 before 0.9.8k-8
0.9.8k-8
openssl
Debian:5.0
 before 0.9.8g-15+lenny6, plus listed versions
0.9.8g-150.9.8g-15+lenny10.9.8g-15+lenny30.9.8g-15+lenny5
0.9.8g-15+lenny6
openssl
Red Hat:enterprise_linux:5::client_workstation
From an advisory covering 2 CVEs
 before 0:0.9.8e-12.el5_4.1
0:0.9.8e-12.el5_4.1
openssl-debuginfo
Red Hat:enterprise_linux:5::client_workstation
From an advisory covering 2 CVEs
 before 0:0.9.8e-12.el5_4.1
0:0.9.8e-12.el5_4.1
openssl-devel
Red Hat:enterprise_linux:5::client_workstation
From an advisory covering 2 CVEs
 before 0:0.9.8e-12.el5_4.1
0:0.9.8e-12.el5_4.1
openssl
Red Hat:enterprise_linux:5::client
From an advisory covering 2 CVEs
 before 0:0.9.8e-12.el5_4.1
0:0.9.8e-12.el5_4.1
openssl-debuginfo
Red Hat:enterprise_linux:5::client
From an advisory covering 2 CVEs
 before 0:0.9.8e-12.el5_4.1
0:0.9.8e-12.el5_4.1
openssl-perl
Red Hat:enterprise_linux:5::client
From an advisory covering 2 CVEs
 before 0:0.9.8e-12.el5_4.1
0:0.9.8e-12.el5_4.1
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Affected packages
PackageAffectedFixed
openssl
Red Hat:enterprise_linux:5::server
From an advisory covering 2 CVEs
 before 0:0.9.8e-12.el5_4.1
0:0.9.8e-12.el5_4.1
openssl-debuginfo
Red Hat:enterprise_linux:5::server
From an advisory covering 2 CVEs
 before 0:0.9.8e-12.el5_4.1
0:0.9.8e-12.el5_4.1
openssl-devel
Red Hat:enterprise_linux:5::server
From an advisory covering 2 CVEs
 before 0:0.9.8e-12.el5_4.1
0:0.9.8e-12.el5_4.1
openssl-perl
Red Hat:enterprise_linux:5::server
From an advisory covering 2 CVEs
 before 0:0.9.8e-12.el5_4.1
0:0.9.8e-12.el5_4.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2009-4355 is a medium vulnerability (CVSS 5.0) in Openssl, published January 13, 2010. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 9.18%, the 95th percentile. Fixed in openssl 0.9.8k-8.

References

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