CVE-2015-8739 : Detail

CVE-2015-8739

5.5
/
Medium
A03-Injection
0.71%V3
Local
2016-01-04
01h00 +00:00
2016-12-05
13h57 +00:00
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CVE Descriptions

The ipmi_fmt_udpport function in epan/dissectors/packet-ipmi.c in the IPMI dissector in Wireshark 2.0.x before 2.0.1 improperly attempts to access a packet scope, which allows remote attackers to cause a denial of service (assertion failure and application exit) via a crafted packet.

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-20 Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Metrics

Metrics Score Severity CVSS Vector Source
V3.0 5.5 MEDIUM CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Base: Exploitabilty Metrics

The Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component.

Attack Vector

This metric reflects the context by which vulnerability exploitation is possible.

Local

A vulnerability exploitable with Local access means that the vulnerable component is not bound to the network stack, and the attacker's path is via read/write/execute capabilities. In some cases, the attacker may be logged in locally in order to exploit the vulnerability, otherwise, she may rely on User Interaction to execute a malicious file.

Attack Complexity

This metric describes the conditions beyond the attacker's control that must exist in order to exploit the vulnerability.

Low

Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.

Privileges Required

This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability.

None

The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.

User Interaction

This metric captures the requirement for a user, other than the attacker, to participate in the successful compromise of the vulnerable component.

Required

Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited. For example, a successful exploit may only be possible during the installation of an application by a system administrator.

Base: Scope Metrics

An important property captured by CVSS v3.0 is the ability for a vulnerability in one software component to impact resources beyond its means, or privileges.

Scope

Formally, Scope refers to the collection of privileges defined by a computing authority (e.g. an application, an operating system, or a sandbox environment) when granting access to computing resources (e.g. files, CPU, memory, etc). These privileges are assigned based on some method of identification and authorization. In some cases, the authorization may be simple or loosely controlled based upon predefined rules or standards. For example, in the case of Ethernet traffic sent to a network switch, the switch accepts traffic that arrives on its ports and is an authority that controls the traffic flow to other switch ports.

Unchanged

An exploited vulnerability can only affect resources managed by the same authority. In this case the vulnerable component and the impacted component are the same.

Base: Impact Metrics

The Impact metrics refer to the properties of the impacted component.

Confidentiality Impact

This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability.

None

There is no loss of confidentiality within the impacted component.

Integrity Impact

This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information.

None

There is no loss of integrity within the impacted component.

Availability Impact

This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability.

High

There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Temporal Metrics

The Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence that one has in the description of a vulnerability.

Environmental Metrics

nvd@nist.gov
V2 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P nvd@nist.gov

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.
EPSS V0
EPSS V1
EPSS V2
EPSS V3
4.004.003.003.002.002.001.001.000.000.003.47%3.47%3.47%3.47%0.27%0.27%0.39%0.39%0.55%0.55%0.71%0.71%Jul '22Jul '2220232023Jul '23Jul '2320242024Jul '24Jul '2420252025
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EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
90908484787872726666606066%83%84%85%63%64%70%72%77%77%80%81%Jul '22Jul '2220232023Jul '23Jul '2320242024Jul '24Jul '2420252025
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Exploit information

Exploit Database EDB-ID : 38994

Publication date : 2015-12-15 23h00 +00:00
Author : Google Security Research
EDB Verified : Yes

Source: https://code.google.com/p/google-security-research/issues/detail?id=662
The following crash due to an asserion failure can be observed in an ASAN build of Wireshark (current git master), by feeding a malformed file to tshark ("$ ./tshark -nVxr /path/to/file"):
--- cut ---
ERROR:wmem_core.c:50:wmem_alloc: assertion failed: (allocator->in_scope)
Program received signal SIGABRT, Aborted.
0x00007fffe1c70cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
56 ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) where
#0 0x00007fffe1c70cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1 0x00007fffe1c740d8 in __GI_abort () at abort.c:89
#2 0x00007fffe3707165 in g_assertion_message () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007fffe37071fa in g_assertion_message_expr () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4 0x00007fffee6b49f5 in wmem_alloc (allocator=<optimized out>, size=<optimized out>) at wmem_core.c:50
#5 0x00007fffeb0f7d40 in wmem_utoa (allocator=0x60700000bd90, port=512) at addr_resolv.c:604
#6 0x00007fffeb0f7c70 in udp_port_to_display (allocator=0x60700000bd90, port=512) at addr_resolv.c:2901
#7 0x00007fffec2e1998 in ipmi_fmt_udpport (s=0x7ffffffface0 "\030\366!\364\377\177", v=512)
at packet-ipmi.c:1283
#8 0x00007fffeb25d6ff in fill_label_number (fi=0x7ffe90b4c2c0,
label_str=0x7fffffffb5e0 "1111 11.. = Sequence Number: 0x3f", is_signed=0) at proto.c:7083
#9 0x00007fffeb2505e2 in proto_item_fill_label (fi=0x7ffe90b4c2c0,
 
 
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Products Mentioned

Configuraton 0

Wireshark>>Wireshark >> Version 2.0.0

References

http://www.securityfocus.com/bid/79382
Tags : vdb-entry, x_refsource_BID
https://security.gentoo.org/glsa/201604-05
Tags : vendor-advisory, x_refsource_GENTOO
http://www.securitytracker.com/id/1034551
Tags : vdb-entry, x_refsource_SECTRACK