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CVE-2013-1762

stunnel 4.21 through 4.54, when CONNECT protocol negotiation and NTLM authentication are enabled,...

6.6 MediumFix available

stunnel 4.21 through 4.54, when CONNECT protocol negotiation and NTLM authentication are enabled, does not correctly perform integer conversion, which allows remote proxy servers to execute arbitrary code via a crafted request that triggers a buffer overflow.

Exploit likelihood

2.93%Unchanged since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 6.6

stunnel 4.21 through 4.54, when CONNECT protocol negotiation and NTLM authentication are enabled, does not correctly perform integer conversion, which allows remote proxy servers to execute arbitrary code via a crafted request that triggers a buffer overflow.

Record
CVE-2013-1762
CVSS 2.0
6.6 MediumAV:N/AC:H/Au:N/C:P/I:P/A:C
Weakness
CWE-94
Updated
2026-11-02
CVE List No score

stunnel 4.21 through 4.54, when CONNECT protocol negotiation and NTLM authentication are enabled, does not correctly perform integer conversion, which allows remote proxy servers to execute arbitrary code via a crafted request that triggers a buffer overflow.

Record
CVE-2013-1762
Updated
2026-11-02
EUVDEUVD-2013-1788 No score

stunnel 4.21 through 4.54, when CONNECT protocol negotiation and NTLM authentication are enabled, does not correctly perform integer conversion, which allows remote proxy servers to execute arbitrary code via a crafted request that triggers a buffer overflow.

Record
EUVD-2013-1788
Updated
2026-11-03
GitHub AdvisoriesGHSA-997q-cp6v-cm6w No score

stunnel 4.21 through 4.54, when CONNECT protocol negotiation and NTLM authentication are enabled,...

stunnel 4.21 through 4.54, when CONNECT protocol negotiation and NTLM authentication are enabled, does not correctly perform integer conversion, which allows remote proxy servers to execute arbitrary code via a crafted request that triggers a buffer overflow.

Record
GHSA-997q-cp6v-cm6w
Weakness
CWE-94
Updated
2026-11-02
OSV No score

stunnel 4.21 through 4.54, when CONNECT protocol negotiation and NTLM authentication are enabled, does not correctly perform integer conversion, which allows remote proxy servers to execute arbitrary code via a crafted request that triggers a buffer overflow.

Record
CVE-2013-1762
Updated
2026-11-02
OSVDEBIAN-CVE-2013-1762 No score

stunnel 4.21 through 4.54, when CONNECT protocol negotiation and NTLM authentication are enabled, does not correctly perform integer conversion, which allows remote proxy servers to execute arbitrary code via a crafted request that triggers a buffer overflow.

Record
DEBIAN-CVE-2013-1762
Updated
2026-11-02
OSVopenSUSE-SU-2024:10289-1 No score

stunnel-5.38-1.1 on GA media

These are all security issues fixed in the stunnel-5.38-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10289-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
stunnel4
Debian:12
 before 3:4.53-1.1
3:4.53-1.1
stunnel4
Debian:13
 before 3:4.53-1.1
3:4.53-1.1
stunnel4
Debian:6.0
 before 3:4.29-1+squeeze1, plus listed versions
3:4.29-1
3:4.29-1+squeeze1
stunnel
Red Hat:enterprise_linux:6::client
 before 0:4.29-3.el6_4
0:4.29-3.el6_4
stunnel-debuginfo
Red Hat:enterprise_linux:6::client
 before 0:4.29-3.el6_4
0:4.29-3.el6_4
stunnel
Red Hat:enterprise_linux:6::computenode
 before 0:4.29-3.el6_4
0:4.29-3.el6_4
stunnel-debuginfo
Red Hat:enterprise_linux:6::computenode
 before 0:4.29-3.el6_4
0:4.29-3.el6_4
stunnel
Red Hat:enterprise_linux:6::server
 before 0:4.29-3.el6_4
0:4.29-3.el6_4
stunnel-debuginfo
Red Hat:enterprise_linux:6::server
 before 0:4.29-3.el6_4
0:4.29-3.el6_4
stunnel
Red Hat:enterprise_linux:6::workstation
 before 0:4.29-3.el6_4
0:4.29-3.el6_4
stunnel-debuginfo
Red Hat:enterprise_linux:6::workstation
 before 0:4.29-3.el6_4
0:4.29-3.el6_4
stunnel
openSUSE:Tumbleweed
From an advisory covering 5 CVEs
 before 5.38-1.1
5.38-1.1

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-2013-1762 is a medium vulnerability (CVSS 6.6) in Stunnel, published March 8, 2013. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.93%, the 87th percentile. Fixed in stunnel4 3:4.53-1.1.

References

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