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Computer vulnerabilities of Cisco Manager Attendant Console
OpenSSL: denial of service via the "Encrypt-Then-Mac" option
Synthesis of the vulnerability
An attacker can change the state of the "Encrypt-Then-Mac" TLS option in a renegotiation with a server or client based on OpenSSL, in order to trigger a denial of service.
Severity: 2/4.
Creation date: 16/02/2017.
Identifiers: 2003480, 2003620, 2003673, 2004940, CERTFR-2017-AVI-035, cisco-sa-20170130-openssl, cpuapr2019, cpujan2018, cpuoct2017, CVE-2017-3733, HPESBGN03728, VIGILANCE-VUL-21871.
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Description of the vulnerability
OpenSSL implements the possibility of renegotiation of TLS option and parameters during a session.
However, for some combinations of algorithms, the negation of the state of the option "Encrypt-Then-Mac" generates a fatal error.
An attacker can therefore change the state of the "Encrypt-Then-Mac" TLS option in a renegotiation with a server or client based on OpenSSL, in order to trigger a denial of service.
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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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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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OpenSSL 1.1.0a: use after free via TLS
Synthesis of the vulnerability
An attacker can force the usage of a freed memory area via TLS on an application linked to OpenSSL 1.1.0a, in order to trigger a denial of service, and possibly to run code.
Severity: 3/4.
Creation date: 26/09/2016.
Identifiers: 1996096, 2000095, 2000209, 2003480, 2003620, 2003673, 2008828, CERTFR-2016-AVI-333, cisco-sa-20160927-openssl, cpuapr2017, cpujan2018, CVE-2016-6309, HPESBHF03856, JSA10759, SA132, TNS-2016-16, VIGILANCE-VUL-20700.
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Description of the vulnerability
The OpenSSL version 1.1.0a product fixed the CVE-2016-6307 vulnerability.
However, the reception of a TLS message of 16kb frees a memory area before reusing it.
An attacker can therefore force the usage of a freed memory area via TLS on an application linked to OpenSSL 1.1.0a, in order to trigger a denial of service, and possibly to run code.
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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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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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OpenSSL: memory corruption via BN_bn2dec
Synthesis of the vulnerability
An attacker can generate a memory corruption via BN_bn2dec() of OpenSSL, in order to trigger a denial of service, and possibly to run code.
Severity: 2/4.
Creation date: 24/08/2016.
Identifiers: 1996096, 1999395, 1999421, 1999474, 1999478, 1999479, 1999488, 1999532, 2000095, 2000209, 2002870, 2003480, 2003620, 2003673, 2008828, bulletinapr2017, bulletinjul2016, CERTFR-2016-AVI-333, cisco-sa-20160927-openssl, cpuapr2017, cpujan2018, cpuoct2017, CVE-2016-2182, 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, JSA10759, K01276005, openSUSE-SU-2016:2391-1, openSUSE-SU-2016:2407-1, openSUSE-SU-2016:2537-1, openSUSE-SU-2018:0458-1, RHSA-2016:1940-01, SA132, SA40312, SB10171, SB10215, SOL01276005, SP-CAAAPUE, SPL-129207, SSA:2016-266-01, 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, TNS-2016-16, USN-3087-1, USN-3087-2, VIGILANCE-VUL-20460.
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Description of the vulnerability
The OpenSSL library works on large numbers to perform operations such are RSA.
The BN_bn2dec() function converts a large number to its decimal representation. However, a special number forces BN_div_word() to return a limit value, then data are written after the end of the memory area.
An attacker can therefore generate a memory corruption via BN_bn2dec() of OpenSSL, in order to trigger a denial of service, and possibly to run code.
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OpenSSL: denial of service via DTLS Window
Synthesis of the vulnerability
An attacker can send a DTLS packet with a large sequence number to an application compiled with OpenSSL, in order to trigger a denial of service.
Severity: 2/4.
Creation date: 24/08/2016.
Identifiers: 1996096, 1999395, 1999474, 1999478, 1999479, 1999488, 1999532, 2000095, 2003480, 2003620, 2003673, bulletinapr2017, bulletinjul2016, CERTFR-2016-AVI-333, cisco-sa-20160927-openssl, cpuapr2017, cpujan2018, cpuoct2017, CVE-2016-2181, 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, JSA10759, K59298921, openSUSE-SU-2016:2391-1, openSUSE-SU-2016:2407-1, openSUSE-SU-2016:2537-1, openSUSE-SU-2018:0458-1, RHSA-2016:1940-01, SA132, SB10215, SOL59298921, SP-CAAAPUE, SPL-129207, SSA:2016-266-01, 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, TNS-2016-16, USN-3087-1, USN-3087-2, VIGILANCE-VUL-20458.
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Description of the vulnerability
The OpenSSL library implements DTLS (Datagram Transport Layer Security, for example on UDP).
In order to manage replays, OpenSSL uses a sliding window containing accepted sequence numbers. However, if an attacker sends a packet with a large sequence number, the window is moved, and legitimate packets thus have numbers before the beginning of the window, and are rejected.
An attacker can therefore send a DTLS packet with a large sequence number to an application compiled with OpenSSL, in order to trigger a denial of service.
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OpenSSL: denial of service via DTLS Reassembly
Synthesis of the vulnerability
An attacker can send DTLS packets in the wrong order with missing packets to an application compiled with OpenSSL, in order to trigger a denial of service.
Severity: 2/4.
Creation date: 24/08/2016.
Identifiers: 1996096, 1999395, 1999474, 1999478, 1999479, 1999488, 1999532, 2000095, 2003480, 2003620, 2003673, bulletinapr2017, bulletinjul2016, bulletinjul2018, CERTFR-2016-AVI-333, cisco-sa-20160927-openssl, cpuapr2017, cpujan2018, cpuoct2017, CVE-2016-2179, 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, JSA10759, openSUSE-SU-2016:2391-1, openSUSE-SU-2016:2407-1, openSUSE-SU-2016:2537-1, openSUSE-SU-2018:0458-1, RHSA-2016:1940-01, SA132, SB10215, SOL23512141, SP-CAAAPUE, SPL-129207, SSA:2016-266-01, 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, TNS-2016-16, USN-3087-1, USN-3087-2, VIGILANCE-VUL-20457.
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Description of the vulnerability
The OpenSSL library implements DTLS (Datagram Transport Layer Security, for example on UDP).
DTLS packets can be in the wrong order. OpenSSL has to keep them in memory, in order to reassemble them. However, in two cases, message queues are not cleared.
An attacker can therefore send DTLS packets in the wrong order with missing packets to an application compiled with OpenSSL, in order to trigger a denial of service.
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OpenSSL: out-of-bounds memory reading via TS_OBJ_print_bio
Synthesis of the vulnerability
An attacker can force a read at an invalid address via TS_OBJ_print_bio() of OpenSSL, in order to trigger a denial of service, or to obtain sensitive information.
Severity: 1/4.
Creation date: 02/08/2016.
Identifiers: 1359615, 1996096, 2000095, 2003480, 2003620, 2003673, bulletinapr2017, bulletinjul2016, CERTFR-2016-AVI-333, cisco-sa-20160927-openssl, cpuapr2017, cpujan2018, cpuoct2017, CVE-2016-2180, 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, JSA10759, openSUSE-SU-2016:2391-1, openSUSE-SU-2016:2407-1, openSUSE-SU-2018:0458-1, RHSA-2016:1940-01, SA132, SA40312, SB10215, SOL02652550, SP-CAAAPUE, SPL-129207, SSA:2016-266-01, SUSE-SU-2016:2387-1, SUSE-SU-2016:2394-1, SUSE-SU-2016:2469-1, TNS-2016-16, USN-3087-1, USN-3087-2, VIGILANCE-VUL-20286.
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Description of the vulnerability
The OpenSSL product implements the RFC 3161 Public Key Infrastructure Time-Stamp Protocol.
However, the TS_OBJ_print_bio() function tries to read a memory area located outside the expected range, which triggers a fatal error, or leads to the disclosure of a memory fragment.
An attacker can therefore force a read at an invalid address via TS_OBJ_print_bio() of OpenSSL, in order to trigger a denial of service, or to obtain sensitive information.
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