CVE-2017-9434

Crypto++ (aka cryptopp) through 5.6.5 contains an out-of-bounds read vulnerability in zinflate...

5.3 MediumFix available

Crypto++ (aka cryptopp) through 5.6.5 contains an out-of-bounds read vulnerability in zinflate.cpp in the Inflator filter.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: None
Availability: None

Exploit likelihood

1.72%Up 0.5 points since Apr 14, 2021

What each source reports

NVD Score used 5.3

Crypto++ (aka cryptopp) through 5.6.5 contains an out-of-bounds read vulnerability in zinflate.cpp in the Inflator filter.

Record: CVE-2017-9434
CVSS 3.0: 5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness: CWE-125
Updated: 2026-11-02

CVE List No score

Crypto++ (aka cryptopp) through 5.6.5 contains an out-of-bounds read vulnerability in zinflate.cpp in the Inflator filter.

Record: CVE-2017-9434
Updated: 2026-11-02

EUVDEUVD-2017-18369 No score

Crypto++ (aka cryptopp) through 5.6.5 contains an out-of-bounds read vulnerability in zinflate.cpp in the Inflator filter.

Record: EUVD-2017-18369
Updated: 2026-11-03

GitHub AdvisoriesGHSA-2c95-vmhq-43cg 5.3

Crypto++ (aka cryptopp) through 5.6.5 contains an out-of-bounds read vulnerability in zinflate...

Crypto++ (aka cryptopp) through 5.6.5 contains an out-of-bounds read vulnerability in zinflate.cpp in the Inflator filter.

Record: GHSA-2c95-vmhq-43cg
CVSS 3.0: 5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-125
Updated: 2026-11-02

OSV 5.3

Crypto++ (aka cryptopp) through 5.6.5 contains an out-of-bounds read vulnerability in zinflate.cpp in the Inflator filter.

Record: CVE-2017-9434
CVSS 3.0: 5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

OSVDEBIAN-CVE-2017-9434 5.3

Crypto++ (aka cryptopp) through 5.6.5 contains an out-of-bounds read vulnerability in zinflate.cpp in the Inflator filter.

Record: DEBIAN-CVE-2017-9434
CVSS 3.0: 5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2017-9434 5.3

Crypto++ (aka cryptopp) through 5.6.5 contains an out-of-bounds read vulnerability in zinflate.cpp in the Inflator filter.

Record: UBUNTU-CVE-2017-9434
CVSS 3.0: 5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

OSVMGASA-2017-0175 No score

Updated libcryptopp packages fix security vulnerability

Crypto++'s Zinflate class, used by classes like Gunzip and Inflator, could perform an out-of-bounds read when decompressing data (CVE-2017-9434).

Record: MGASA-2017-0175
Updated: 2026-11-02

OSVUSN-4827-1 No score

libcrypto++ vulnerability

It was discovered that Crypto++ mishandled certain input. An attacker could use this vulnerability to leak potentially sensitive information.

Record: USN-4827-1
Updated: 2026-11-02

Affected products

cryptopp crypto\+\+

Affected packages

Affected packages
Package	Affected	Fixed
`libcrypto++` Debian:12	before 5.6.4-7	5.6.4-7
`libcrypto++` Debian:13	before 5.6.4-7	5.6.4-7
`libcrypto++` Debian:14	before 5.6.4-7	5.6.4-7
`libcryptopp` Mageia:5	before 5.6.3-1.4.mga5	5.6.3-1.4.mga5
`libcrypto++` Ubuntu:Pro:14.04:LTS	before 5.6.1-6+deb8u3ubuntu0.1~esm1, plus listed versions 5.6.1-65.6.1-6+deb8u1build0.14.04.15.6.1-6+deb8u3build0.14.04.1	5.6.1-6+deb8u3ubuntu0.1~esm1
`libcrypto++` Ubuntu:Pro:16.04:LTS	before 5.6.1-9ubuntu0.1+esm1, plus listed versions 5.6.1-85.6.1-95.6.1-9ubuntu0.1	5.6.1-9ubuntu0.1+esm1

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

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

In short

CVE-2017-9434 is a medium vulnerability (CVSS 5.3) in Cryptopp Crypto\+\+, published June 5, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.72%, the 77th percentile. Fixed in libcrypto++ 5.6.4-7.

References

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