Cisco ASR 5000 ASN1C asn1rt_a.lib rtxMemHeapAlloc integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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9.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Cisco ASR 5000. Impacted is the function rtxMemHeapAlloc in the library asn1rt_a.lib of the component ASN1C. Such manipulation leads to integer overflow. This vulnerability is referenced as CVE-2016-5080. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Cisco ASR 5000 (Router Operating System) (affected version not known). It has been rated as very critical. Affected by this issue is the function rtxMemHeapAlloc in the library asn1rt_a.lib of the component ASN1C. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is confidentiality, integrity, and availability.

The weakness was published 07/18/2016 by Lucas Molas (Website). The advisory is shared for download at github.com. The advisory contains:

A vulnerability found in the runtime support libraries of the ASN1C compiler for C/C++ from Objective Systems Inc. could allow an attacker to remotely execute code in software systems, including embeded software and firmware, that use code generated by the ASN1C compiler. The vulnerability could be triggered remotely without any authentication in scenarios where the vulnerable code receives and processes ASN.1 encoded data from untrusted sources, these may include communications between mobile devices and telecommunication network infrastructure nodes, communications between nodes in a carrier's network or across carrier boundaries, or communication between mutually untrusted endpoints in a data network.
This vulnerability is handled as CVE-2016-5080 since 05/26/2016. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 01/13/2025).

The vulnerability is also documented in the databases at SecurityFocus (BID 91836†) and SecurityTracker (ID 1036386†). Similar entries are available at VDB-90138, VDB-94981 and VDB-125382. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/26/2016 🔍
07/18/2016 +53 days 🔍
07/19/2016 +1 days 🔍
07/19/2016 +0 days 🔍
07/20/2016 +1 days 🔍
07/20/2016 +0 days 🔍
01/13/2025 +3099 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: 137970
Researcher: Lucas Molas
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-5080 (🔍)
GCVE (CVE): GCVE-0-2016-5080
GCVE (VulDB): GCVE-100-90260
CERT: 🔍
SecurityFocus: 91836 - Objective Systems ASN1C CVE-2016-5080 Heap Based Buffer Overflow Vulnerability
SecurityTracker: 1036386

See also: 🔍

Entryinfo

Created: 07/20/2016 11:47
Updated: 01/13/2025 04:02
Changes: 07/20/2016 11:47 (56), 03/07/2019 23:25 (13), 09/09/2022 10:56 (4), 01/13/2025 04:02 (15)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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