PCRE/PCRE2 libpcre1/libpcre2 memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in PCRE and PCRE2. This vulnerability affects unknown code of the component libpcre1/libpcre2. Performing a manipulation results in memory corruption. This vulnerability is reported as CVE-2017-7186. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in PCRE and PCRE2 (Programming Tool Software). It has been classified as problematic. This affects an unknown code of the component libpcre1/libpcre2. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on availability. The summary by CVE is:

libpcre1 in PCRE 8.40 and libpcre2 in PCRE2 10.23 allow remote attackers to cause a denial of service (segmentation violation for read access, and application crash) by triggering an invalid Unicode property lookup.

The bug was discovered 03/14/2017. The weakness was disclosed 03/20/2017 by Agostino Sarubbo (Website). The advisory is shared at bugs.exim.org. This vulnerability is uniquely identified as CVE-2017-7186 since 03/19/2017. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 5 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 99696 (Fedora 24 : pcre2 (2017-2c4ddb3ca2)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 276610 (Fedora Security Update for pcre (FEDORA-2017-b4d4a46af6)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (99696) and SecurityFocus (BID 97030†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • PCRE 8.40
  • PCRE2 10.23

Productinfo

Type

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
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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Nessus ID: 99696
Nessus Name: Fedora 24 : pcre2 (2017-2c4ddb3ca2)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for pcre FEDORA-2017-b4d4a46af6
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

02/23/2017 🔍
03/14/2017 +19 days 🔍
03/19/2017 +5 days 🔍
03/19/2017 +0 days 🔍
03/20/2017 +1 days 🔍
03/20/2017 +0 days 🔍
04/26/2017 +37 days 🔍
04/27/2017 +1 days 🔍
08/24/2024 +2676 days 🔍

Sourcesinfo

Advisory: bugs.exim.org
Researcher: Agostino Sarubbo
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-7186 (🔍)
GCVE (CVE): GCVE-0-2017-7186
GCVE (VulDB): GCVE-100-98277
SecurityFocus: 97030 - PCRE CVE-2017-7186 Denial of Service Vulnerability
OSVDB: - CVE-2017-7186 - libpcre, PCRE - Denial of Service Issue

Entryinfo

Created: 03/20/2017 07:59
Updated: 08/24/2024 09:33
Changes: 03/20/2017 07:59 (71), 09/10/2020 09:33 (8), 08/24/2024 09:33 (19)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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