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Computer vulnerabilities of stunnel

weakness note 29489

stunnel: privilege escalation via Insecure OpenSSL Cross-compilation

Synthesis of the vulnerability

An attacker can bypass restrictions via Insecure OpenSSL Cross-compilation of stunnel, in order to escalate his privileges.
Severity: 2/4.
Creation date: 11/06/2019.
Identifiers: VIGILANCE-VUL-29489.
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Description of the vulnerability

An attacker can bypass restrictions via Insecure OpenSSL Cross-compilation of stunnel, in order to escalate his privileges.
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cybersecurity vulnerability 26599

stunnel: privilege escalation via Client Certificate Check

Synthesis of the vulnerability

An attacker can bypass restrictions via Client Certificate Check of stunnel, in order to escalate his privileges.
Severity: 3/4.
Creation date: 03/07/2018.
Identifiers: VIGILANCE-VUL-26599.
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Description of the vulnerability

An attacker can bypass restrictions via Client Certificate Check of stunnel, in order to escalate his privileges.
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weakness bulletin CVE-2018-0739

OpenSSL: denial of service via Recursive ASN.1

Synthesis of the vulnerability

An attacker can generate a fatal error via Recursive ASN.1 of OpenSSL, in order to trigger a denial of service.
Severity: 2/4.
Creation date: 27/03/2018.
Identifiers: 2015887, 524146, bulletinjan2019, CERTFR-2018-AVI-155, cpuapr2019, cpujan2019, cpujul2018, cpujul2019, cpuoct2018, CVE-2018-0739, DLA-1330-1, DSA-2018-125, DSA-4157-1, DSA-4158-1, FEDORA-2018-1b4f1158e2, FEDORA-2018-40dc8b8b16, FEDORA-2018-76afaf1961, FEDORA-2018-9490b422e7, ibm10715641, ibm10717211, ibm10717405, ibm10717409, ibm10719319, ibm10733605, ibm10738249, ibm10874728, K08044291, N1022561, openSUSE-SU-2018:0936-1, openSUSE-SU-2018:1057-1, openSUSE-SU-2018:2208-1, openSUSE-SU-2018:2238-1, openSUSE-SU-2018:2524-1, openSUSE-SU-2018:2695-1, PAN-SA-2018-0015, RHSA-2018:3090-01, RHSA-2018:3221-01, SA166, SB10243, SSA-181018, SUSE-SU-2018:0902-1, SUSE-SU-2018:0905-1, SUSE-SU-2018:0906-1, SUSE-SU-2018:0975-1, SUSE-SU-2018:2072-1, SUSE-SU-2018:2158-1, SUSE-SU-2018:2683-1, Synology-SA-18:51, USN-3611-1, USN-3611-2, VIGILANCE-VUL-25666.
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Description of the vulnerability

An attacker can generate a fatal error via Recursive ASN.1 of OpenSSL, in order to trigger a denial of service.
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security announce CVE-2017-3735

OpenSSL: out-of-bounds memory reading via X.509 IPAddressFamily

Synthesis of the vulnerability

An attacker can force a read at an invalid address via X.509 IPAddressFamily of OpenSSL, in order to trigger a denial of service, or to obtain sensitive information.
Severity: 2/4.
Creation date: 02/11/2017.
Identifiers: 2011879, 2013026, 2014367, bulletinapr2018, CERTFR-2017-AVI-391, cpuapr2018, cpuapr2019, cpujan2018, cpujan2019, cpujul2018, cpujul2019, cpuoct2018, CVE-2017-3735, DSA-4017-1, DSA-4018-1, FEDORA-2017-4cf72e2c11, FEDORA-2017-512a6c5aae, FEDORA-2017-55a3247cfd, FEDORA-2017-7f30914972, FEDORA-2017-dbec196dd8, FreeBSD-SA-17:11.openssl, HT208331, HT208394, ibm10715641, ibm10738249, JSA10851, openSUSE-SU-2017:3192-1, openSUSE-SU-2018:0029-1, openSUSE-SU-2018:0315-1, RHSA-2018:3221-01, SA157, SB10211, SUSE-SU-2017:2968-1, SUSE-SU-2017:2981-1, SUSE-SU-2018:0112-1, TNS-2017-15, USN-3475-1, VIGILANCE-VUL-24317.
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Description of the vulnerability

An attacker can force a read at an invalid address via X.509 IPAddressFamily of OpenSSL, in order to trigger a denial of service, or to obtain sensitive information.
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computer threat note CVE-2017-3736

OpenSSL: Man-in-the-Middle via bn_sqrx8x_internal

Synthesis of the vulnerability

An attacker can act as a Man-in-the-Middle and use a carry error of bn_sqrx8x_internal() on OpenSSL, in order to read or write data in the session.
Severity: 1/4.
Creation date: 02/11/2017.
Identifiers: 2012827, 2013025, 2014202, 2014651, 2014669, 2015080, bulletinapr2018, bulletinjan2018, CERTFR-2017-AVI-391, cpuapr2018, cpuapr2019, cpujan2018, cpujan2019, cpujul2018, cpujul2019, cpuoct2018, CVE-2017-3736, DSA-4017-1, DSA-4018-1, FEDORA-2017-4cf72e2c11, FEDORA-2017-512a6c5aae, FEDORA-2017-55a3247cfd, FEDORA-2017-7f30914972, FEDORA-2017-dbec196dd8, FreeBSD-SA-17:11.openssl, ibm10715641, ibm10719113, ibm10732391, ibm10733905, ibm10738249, ibm10738401, JSA10851, K14363514, openSUSE-SU-2017:3192-1, openSUSE-SU-2018:0029-1, openSUSE-SU-2018:0315-1, RHSA-2018:0998-01, RHSA-2018:2568-01, RHSA-2018:2575-01, SA157, SB10211, SB10220, SSA:2017-306-02, STORM-2017-006, SUSE-SU-2018:2839-1, SUSE-SU-2018:3082-1, TNS-2017-15, USN-3475-1, VIGILANCE-VUL-24316.
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Description of the vulnerability

An attacker can act as a Man-in-the-Middle and use a carry error of bn_sqrx8x_internal() on OpenSSL, in order to read or write data in the session.
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weakness announce CVE-2016-7055 CVE-2017-3730 CVE-2017-3731

OpenSSL: multiple vulnerabilities

Synthesis of the vulnerability

An attacker can use several vulnerabilities of OpenSSL.
Severity: 2/4.
Number of vulnerabilities in this bulletin: 4.
Creation date: 26/01/2017.
Identifiers: 1117414, 2000544, 2000988, 2000990, 2002331, 2004036, 2004940, 2009389, 2010154, 2011567, 2012827, 2014202, 2014651, 2014669, 2015080, BSA-2016-204, BSA-2016-207, BSA-2016-211, BSA-2016-212, BSA-2016-213, BSA-2016-216, BSA-2016-234, bulletinapr2017, bulletinjan2018, bulletinoct2017, CERTFR-2017-AVI-035, CERTFR-2018-AVI-343, cisco-sa-20170130-openssl, cpuapr2017, cpuapr2019, cpujan2018, cpujul2017, cpujul2018, cpuoct2017, CVE-2016-7055, CVE-2017-3730, CVE-2017-3731, CVE-2017-3732, DLA-814-1, DSA-3773-1, FEDORA-2017-3451dbec48, FEDORA-2017-e853b4144f, FG-IR-17-019, FreeBSD-SA-17:02.openssl, ibm10732391, ibm10733905, ibm10738249, ibm10738401, JSA10775, K37526132, K43570545, K44512851, K-510805, NTAP-20170127-0001, NTAP-20170310-0002, NTAP-20180201-0001, openSUSE-SU-2017:0481-1, openSUSE-SU-2017:0487-1, openSUSE-SU-2017:0527-1, openSUSE-SU-2017:0941-1, openSUSE-SU-2017:2011-1, openSUSE-SU-2017:2868-1, openSUSE-SU-2018:0458-1, PAN-70674, PAN-73914, PAN-SA-2017-0012, PAN-SA-2017-0014, PAN-SA-2017-0016, RHSA-2017:0286-01, RHSA-2018:2568-01, RHSA-2018:2575-01, SA141, SA40423, SB10188, SSA:2017-041-02, SUSE-SU-2018:0112-1, SUSE-SU-2018:2839-1, SUSE-SU-2018:3082-1, TNS-2017-03, USN-3181-1, VIGILANCE-VUL-21692.
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Description of the vulnerability

Several vulnerabilities were announced in OpenSSL.

An attacker can force a read at an invalid address via Truncated Packet, in order to trigger a denial of service, or to obtain sensitive information. [severity:2/4; CVE-2017-3731]

An attacker can force a NULL pointer to be dereferenced via DHE/ECDHE Parameters, in order to trigger a denial of service. [severity:2/4; CVE-2017-3730]

An attacker can use a carry propagation error via BN_mod_exp(), in order to compute the private key. [severity:1/4; CVE-2017-3732]

An error occurs in the Broadwell-specific Montgomery Multiplication Procedure, but with no apparent impact. [severity:1/4; CVE-2016-7055]
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computer threat alert CVE-2016-8610

OpenSSL: denial of service via SSL3_AL_WARNING

Synthesis of the vulnerability

An attacker can send SSL3_AL_WARNING packets to an SSLv3 application linked to OpenSSL, in order to trigger a denial of service.
Severity: 2/4.
Creation date: 24/10/2016.
Identifiers: 1996096, 2000095, 2003480, 2003620, 2003673, 2004940, 2009389, bulletinoct2016, cpujul2019, CVE-2016-8610, DLA-814-1, DSA-3773-1, FEDORA-2017-3451dbec48, FEDORA-2017-e853b4144f, FreeBSD-SA-16:35.openssl, HPESBHF03897, JSA10808, JSA10809, JSA10810, JSA10811, JSA10813, JSA10814, JSA10816, JSA10817, JSA10818, JSA10820, JSA10821, JSA10822, JSA10825, openSUSE-SU-2017:0386-1, openSUSE-SU-2017:0487-1, openSUSE-SU-2018:4104-1, PAN-SA-2017-0017, pfSense-SA-17_03.webgui, RHSA-2017:0286-01, RHSA-2017:0574-01, RHSA-2017:1548-01, RHSA-2017:1549-01, RHSA-2017:1550-01, RHSA-2017:1551-01, RHSA-2017:1552-01, RHSA-2017:1658-01, RHSA-2017:1659-01, RHSA-2017:2493-01, RHSA-2017:2494-01, SA40886, SP-CAAAPUE, SPL-129207, SUSE-SU-2017:0304-1, SUSE-SU-2017:0348-1, SUSE-SU-2018:0112-1, SUSE-SU-2018:3864-1, SUSE-SU-2018:3864-2, SUSE-SU-2018:3964-1, SUSE-SU-2018:3994-1, SUSE-SU-2018:4068-1, SUSE-SU-2018:4274-1, SUSE-SU-2019:1553-1, USN-3181-1, USN-3183-1, USN-3183-2, VIGILANCE-VUL-20941.
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Description of the vulnerability

The OpenSSL product implements the SSL version 3 protocol.

The SSL3_AL_WARNING message is used to send an alert of level Warning. However, when these packets are received during the handshake, the library consumes 100% of CPU.

An attacker can therefore send SSL3_AL_WARNING packets to an SSLv3 application linked to OpenSSL, in order to trigger a denial of service.
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security alert CVE-2016-7052

OpenSSL 1.0.2i: NULL pointer dereference via CRL

Synthesis of the vulnerability

An attacker can force a NULL pointer to be dereferenced via a CRL on an application linked to OpenSSL 1.0.2i, in order to trigger a denial of service.
Severity: 2/4.
Creation date: 26/09/2016.
Identifiers: 1996096, 2000095, 2000209, 2003480, 2003620, 2003673, 2008828, CERTFR-2016-AVI-333, cisco-sa-20160927-openssl, cpuapr2017, cpujan2018, cpuoct2017, CVE-2016-7052, FEDORA-2016-97454404fe, FEDORA-2016-a555159613, FreeBSD-SA-16:27.openssl, HPESBHF03856, JSA10759, openSUSE-SU-2016:2496-1, openSUSE-SU-2018:0458-1, SA132, SB10171, SP-CAAAPUE, SPL-129207, SSA:2016-270-01, SUSE-SU-2016:2470-1, SUSE-SU-2016:2470-2, TNS-2016-16, VIGILANCE-VUL-20701.
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Description of the vulnerability

The OpenSSL version 1.0.2i product fixed a bug in CRL management.

However, this fix does not check if a pointer is NULL, before using it.

An attacker can therefore force a NULL pointer to be dereferenced via a CRL on an application linked to OpenSSL 1.0.2i, in order to trigger a denial of service.
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cybersecurity announce CVE-2016-6302 CVE-2016-6303 CVE-2016-6304

OpenSSL: seven vulnerabilities

Synthesis of the vulnerability

An attacker can use several vulnerabilities of OpenSSL.
Severity: 3/4.
Number of vulnerabilities in this bulletin: 7.
Creation date: 22/09/2016.
Identifiers: 1991866, 1991867, 1991870, 1991871, 1991875, 1991876, 1991878, 1991880, 1991882, 1991884, 1991885, 1991886, 1991887, 1991889, 1991892, 1991894, 1991896, 1991902, 1991903, 1991951, 1991955, 1991959, 1991960, 1991961, 1992681, 1993777, 1996096, 1999395, 1999421, 1999474, 1999478, 1999479, 1999488, 1999532, 2000095, 2000209, 2000544, 2002870, 2003480, 2003620, 2003673, 2008828, bulletinapr2017, bulletinjul2016, bulletinoct2016, CERTFR-2016-AVI-320, CERTFR-2016-AVI-333, cisco-sa-20160927-openssl, cpuapr2017, cpuapr2018, cpujan2017, cpujan2018, cpujul2017, cpujul2019, cpuoct2017, CVE-2016-6302, CVE-2016-6303, CVE-2016-6304, CVE-2016-6305, CVE-2016-6306, CVE-2016-6307, CVE-2016-6308, DLA-637-1, DSA-3673-1, DSA-3673-2, FEDORA-2016-97454404fe, FEDORA-2016-a555159613, FG-IR-16-047, FG-IR-16-048, FG-IR-17-127, FreeBSD-SA-16:26.openssl, HPESBHF03856, HT207423, JSA10759, openSUSE-SU-2016:2391-1, openSUSE-SU-2016:2407-1, openSUSE-SU-2016:2496-1, openSUSE-SU-2016:2537-1, openSUSE-SU-2018:0458-1, RHSA-2016:1940-01, RHSA-2016:2802-01, RHSA-2017:1548-01, RHSA-2017:1549-01, RHSA-2017:1550-01, RHSA-2017:1551-01, RHSA-2017:1552-01, RHSA-2017:1658-01, RHSA-2017:1659-01, RHSA-2017:2493-01, RHSA-2017:2494-01, SA132, SA40312, SB10171, SB10215, SOL54211024, SOL90492697, SP-CAAAPUE, SPL-129207, SSA:2016-266-01, STORM-2016-005, SUSE-SU-2016:2387-1, SUSE-SU-2016:2394-1, SUSE-SU-2016:2458-1, SUSE-SU-2016:2468-1, SUSE-SU-2016:2469-1, SUSE-SU-2016:2470-1, SUSE-SU-2016:2470-2, TNS-2016-16, USN-3087-1, USN-3087-2, VIGILANCE-VUL-20678.
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Description of the vulnerability

Several vulnerabilities were announced in OpenSSL.

An attacker can create a memory over consumption via an OCSP request, in order to trigger a denial of service. [severity:3/4; CVE-2016-6304]

An attacker can make a process block itself via SSL_peek, in order to trigger a denial of service. [severity:2/4; CVE-2016-6305]

An attacker can generate a buffer overflow via MDC2_Update, in order to trigger a denial of service, and possibly to run code. [severity:1/4; CVE-2016-6303]

An attacker can generate a read only buffer overflow, in order to trigger a denial of service. [severity:1/4; CVE-2016-6302]

An attacker can generate a read only buffer overflow via the parsing of an X.509 certificate, in order to trigger a denial of service. [severity:1/4; CVE-2016-6306]

An attacker can make the server allocates a large amount of memory to process TLS packets. [severity:1/4; CVE-2016-6307]

An attacker can make the server allocates a large amount of memory to process DTLS packets. [severity:1/4; CVE-2016-6308]
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threat announce CVE-2016-2183 CVE-2016-6329

Blowfish, Triple-DES: algorithms too weak, SWEET32

Synthesis of the vulnerability

An attacker can create a TLS/VPN session with a Blowfish/Triple-DES algorithm, and perform a two days attack, in order to decrypt data.
Severity: 1/4.
Number of vulnerabilities in this bulletin: 2.
Creation date: 25/08/2016.
Identifiers: 1610582, 1991866, 1991867, 1991870, 1991871, 1991875, 1991876, 1991878, 1991880, 1991882, 1991884, 1991885, 1991886, 1991887, 1991889, 1991892, 1991894, 1991896, 1991902, 1991903, 1991951, 1991955, 1991959, 1991960, 1991961, 1992681, 1993777, 1994375, 1995099, 1995922, 1998797, 1999054, 1999421, 2000209, 2000212, 2000370, 2000544, 2001608, 2002021, 2002335, 2002336, 2002479, 2002537, 2002870, 2002897, 2002991, 2003145, 2003480, 2003620, 2003673, 2004036, 2008828, 523628, 9010102, bulletinapr2017, c05349499, c05369403, c05369415, c05390849, CERTFR-2017-AVI-012, CERTFR-2019-AVI-049, CERTFR-2019-AVI-311, cisco-sa-20160927-openssl, cpuapr2017, cpujan2018, cpujul2017, cpujul2019, cpuoct2017, CVE-2016-2183, CVE-2016-6329, DSA-2018-124, DSA-2019-131, DSA-3673-1, DSA-3673-2, FEDORA-2016-7810e24465, FEDORA-2016-dc2cb4ad6b, FG-IR-16-047, FG-IR-16-048, FG-IR-17-127, FG-IR-17-173, HPESBGN03697, HPESBGN03765, HPESBUX03725, HPSBGN03690, HPSBGN03694, HPSBHF03674, ibm10718843, java_jan2017_advisory, JSA10770, KM03060544, NTAP-20160915-0001, openSUSE-SU-2016:2199-1, openSUSE-SU-2016:2391-1, openSUSE-SU-2016:2407-1, openSUSE-SU-2016:2496-1, openSUSE-SU-2016:2537-1, openSUSE-SU-2017:1638-1, openSUSE-SU-2018:0458-1, RHSA-2017:0336-01, RHSA-2017:0337-01, RHSA-2017:0338-01, RHSA-2017:3113-01, RHSA-2017:3114-01, RHSA-2017:3239-01, RHSA-2017:3240-01, RHSA-2018:2123-01, SA133, SA40312, SB10171, SB10186, SB10197, SB10215, SOL13167034, SP-CAAAPUE, SPL-129207, SSA:2016-266-01, SSA:2016-363-01, SSA-556833, SUSE-SU-2016:2387-1, SUSE-SU-2016:2394-1, SUSE-SU-2016:2458-1, SUSE-SU-2016:2468-1, SUSE-SU-2016:2469-1, SUSE-SU-2016:2470-1, SUSE-SU-2016:2470-2, SUSE-SU-2017:1444-1, SUSE-SU-2017:2838-1, SUSE-SU-2017:3177-1, SWEET32, TNS-2016-16, USN-3087-1, USN-3087-2, USN-3270-1, USN-3339-1, USN-3339-2, USN-3372-1, VIGILANCE-VUL-20473.
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Description of the vulnerability

The Blowfish and Triple-DES symetric encryption algorithms use 64 bit blocks.

However, if they are used in CBC mode, a collision occurs after 785 GB transferred, and it is then possible to decrypt blocks with an attack lasting two days.

An attacker can therefore create a TLS/VPN session with a Blowfish/Triple-DES algorithm, and perform a two days attack, in order to decrypt data.
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