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CVE-2023-25076

A buffer overflow vulnerability exists in the handling of wildcard backend hosts of SNIProxy 0.6...

9.8 CriticalFix available

A buffer overflow vulnerability exists in the handling of wildcard backend hosts of SNIProxy 0.6.0-2 and the master branch (commit: 822bb80df9b7b345cc9eba55df74a07b498819ba). A specially crafted HTTP or TLS packet can lead to arbitrary code execution. An attacker could send a malicious packet to trigger this vulnerability.

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
High
Integrity
High
Availability
High

Exploit likelihood

65.8%Up 65.7 points since Mar 31, 2023
90%50%10%1%

What each source reports

CVE List Score used 9.8

A buffer overflow vulnerability exists in the handling of wildcard backend hosts of SNIProxy 0.6.0-2 and the master branch (commit: 822bb80df9b7b345cc9eba55df74a07b498819ba). A specially crafted HTTP or TLS packet can lead to arbitrary code execution. An attacker could send a malicious packet to trigger this vulnerability.

Record
CVE-2023-25076
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-120
Updated
2026-11-02
EUVDEUVD-2023-29055 9.8

A buffer overflow vulnerability exists in the handling of wildcard backend hosts of SNIProxy 0.6.0-2 and the master branch (commit: 822bb80df9b7b345cc9eba55df74a07b498819ba). A specially crafted HTTP or TLS packet can lead to arbitrary code execution. An attacker could send a malicious packet to trigger this vulnerability.

Record
EUVD-2023-29055
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-fhgm-rvpq-xwx9 9.8

A buffer overflow vulnerability exists in the handling of wildcard backend hosts of SNIProxy 0.6...

A buffer overflow vulnerability exists in the handling of wildcard backend hosts of SNIProxy 0.6.0-2 and the master branch (commit: 822bb80df9b7b345cc9eba55df74a07b498819ba). A specially crafted HTTP, TLS or DTLS packet can lead to arbitrary code execution. An attacker could send a malicious packet to trigger this vulnerability.

Record
GHSA-fhgm-rvpq-xwx9
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-120
Updated
2026-11-02
NVD 9.8

A buffer overflow vulnerability exists in the handling of wildcard backend hosts of SNIProxy 0.6.0-2 and the master branch (commit: 822bb80df9b7b345cc9eba55df74a07b498819ba). A specially crafted HTTP or TLS packet can lead to arbitrary code execution. An attacker could send a malicious packet to trigger this vulnerability.

Record
CVE-2023-25076
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-120
Updated
2026-11-02
OSV 9.8

A buffer overflow vulnerability exists in the handling of wildcard backend hosts of SNIProxy 0.6.0-2 and the master branch (commit: 822bb80df9b7b345cc9eba55df74a07b498819ba). A specially crafted HTTP or TLS packet can lead to arbitrary code execution. An attacker could send a malicious packet to trigger this vulnerability.

Record
CVE-2023-25076
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-120
Updated
2026-11-02
OSVDEBIAN-CVE-2023-25076 9.8

A buffer overflow vulnerability exists in the handling of wildcard backend hosts of SNIProxy 0.6.0-2 and the master branch (commit: 822bb80df9b7b345cc9eba55df74a07b498819ba). A specially crafted HTTP or TLS packet can lead to arbitrary code execution. An attacker could send a malicious packet to trigger this vulnerability.

Record
DEBIAN-CVE-2023-25076
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2023-25076 9.8

A buffer overflow vulnerability exists in the handling of wildcard backend hosts of SNIProxy 0.6.0-2 and the master branch (commit: 822bb80df9b7b345cc9eba55df74a07b498819ba). A specially crafted HTTP or TLS packet can lead to arbitrary code execution. An attacker could send a malicious packet to trigger this vulnerability.

Record
UBUNTU-CVE-2023-25076
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVMGASA-2023-0178 No score

Updated sniproxy packages fix security vulnerability

A buffer overflow vulnerability exists in the handling of wildcard backend hosts of SNIProxy. A specially crafted HTTP or TLS packet can lead to arbitrary code execution. An attacker could send a malicious packet to trigger this vulnerability. (CVE-2023-25076)

Record
MGASA-2023-0178
Updated
2026-11-02
OSVUSN-6148-1 No score

sniproxy vulnerability

It was discovered that SNI Proxy did not properly handle wildcard backend hosts. An attacker could possibly use this issue to cause a buffer overflow, resulting in a denial of service, or arbitrary code execution.

Record
USN-6148-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
sniproxy
Debian:12
 before 0.6.0-2.1
0.6.0-2.1
sniproxy
Debian:13
 before 0.6.0-2.1
0.6.0-2.1
sniproxy
Debian:14
 before 0.6.0-2.1
0.6.0-2.1
sniproxy
Debian:10
 before 0.6.0-1+deb10u1, plus listed versions
0.6.0-1
0.6.0-1+deb10u1
sniproxy
Debian:11
 before 0.6.0-2+deb11u1, plus listed versions
0.6.0-2
0.6.0-2+deb11u1
sniproxy
Mageia:8
 before 0.6.1-1.mga8
0.6.1-1.mga8
sniproxy
Ubuntu:Pro:18.04:LTS
 before 0.5.0-2ubuntu0.1~esm1, plus listed versions
0.5.0-2
0.5.0-2ubuntu0.1~esm1
sniproxy
Ubuntu:20.04:LTS
 before 0.6.0-1ubuntu0.1, plus listed versions
0.6.0-1
0.6.0-1ubuntu0.1
sniproxy
Ubuntu:22.04:LTS
 before 0.6.0-2ubuntu0.22.04.1, plus listed versions
0.6.0-2
0.6.0-2ubuntu0.22.04.1
sniproxy
Ubuntu:24.04:LTS
 before 0.6.0-2.1build2, plus listed versions
0.6.0-2.10.6.0-2.1build1
0.6.0-2.1build2

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

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

In short

CVE-2023-25076 is a critical vulnerability (CVSS 9.8) in Sniproxy, published March 30, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 65.8%, the 99th percentile. Fixed in sniproxy 0.6.0-2.1.

References

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