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Vulnerability Intelligence

Vulnerability IntelligenceCVE-2016-1938

CVE-2016-1938

MEDIUM6.5

The s_mp_div function in lib/freebl/mpi/mpi

Published Jan 31, 2016

Modified 1 years ago

Details

The s_mp_div function in lib/freebl/mpi/mpi.c in Mozilla Network Security Services (NSS) before 3.21, as used in Mozilla Firefox before 44.0, improperly divides numbers, which might make it easier for remote attackers to defeat cryptographic protection mechanisms by leveraging use of the (1) mp_div or (2) mp_exptmod function.

References

http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00001.html

http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00002.html

http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00010.html

http://www.debian.org/security/2016/dsa-3688

http://www.mozilla.org/security/announce/2016/mfsa2016-07.html

http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html

http://www.securityfocus.com/bid/81955

http://www.securityfocus.com/bid/91787

http://www.securitytracker.com/id/1034825

http://www.ubuntu.com/usn/USN-2880-1

http://www.ubuntu.com/usn/USN-2880-2

http://www.ubuntu.com/usn/USN-2903-1

http://www.ubuntu.com/usn/USN-2903-2

http://www.ubuntu.com/usn/USN-2973-1

https://blog.fuzzing-project.org/37-Mozilla-NSS-Wrong-calculation-results-in-mp_div-and-mp_exptmod.html

https://bugzilla.mozilla.org/show_bug.cgi?id=1190248

https://bugzilla.mozilla.org/show_bug.cgi?id=1194947

https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.21_release_notes

https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_div.c

https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_exptmod.c

https://hg.mozilla.org/projects/nss/diff/a555bf0fc23a/lib/freebl/mpi/mpi.c

https://security.gentoo.org/glsa/201605-06

https://security.gentoo.org/glsa/201701-46

https://www.cve.org/CVERecord?id=CVE-2016-1938

CVSS Analysis

CVSS v3.0

6.5

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

Scope

UnchangedS:U

Impact

Confidentiality

LowC:L

Integrity

LowI:L

Availability

NoneA:N

6.5/CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Ecosystems

Timeline

PublishedJan 31, 2016

ModifiedAug 5, 2024

CVE-2016-1938 | Mondoo Vulnerability Intelligence