Perl 5.22/5.23/5.24/5.25/5.26 Regular Expression memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Perl 5.22/5.23/5.24/5.25/5.26. It has been rated as critical. This affects an unknown part of the component Regular Expression. This manipulation causes memory corruption. This vulnerability is registered as CVE-2018-6798. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Perl 5.22/5.23/5.24/5.25/5.26 (Programming Language Software). It has been declared as critical. Affected by this vulnerability is an unknown function of the component Regular Expression. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in Perl 5.22 through 5.26. Matching a crafted locale dependent regular expression can cause a heap-based buffer over-read and potentially information disclosure.

The bug was discovered 04/15/2018. The weakness was published 04/17/2018 (Website). The advisory is shared at debian.org. This vulnerability is known as CVE-2018-6798 since 02/06/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 111150 (SUSE SLED12 / SLES12 Security Update : perl (SUSE-SU-2018:1972-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171033 (SUSE Enterprise Linux Security Update for perl (SUSE-SU-2018:0976-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (111150) and SecurityFocus (BID 103953†). Similar entries are available at VDB-116304, VDB-116306, VDB-119252 and VDB-126325. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 111150
Nessus Name: SUSE SLED12 / SLES12 Security Update : perl (SUSE-SU-2018:1972-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 53601
OpenVAS Name: Fedora Update for perl-Module-CoreList FEDORA-2018-1c8b49fbc7
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

02/06/2018 🔍
04/14/2018 +67 days 🔍
04/15/2018 +1 days 🔍
04/17/2018 +1 days 🔍
04/17/2018 +0 days 🔍
04/18/2018 +1 days 🔍
07/17/2018 +90 days 🔍
07/18/2018 +1 days 🔍
02/28/2023 +1686 days 🔍

Sourcesinfo

Advisory: RHSA-2018:1192
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-6798 (🔍)
GCVE (CVE): GCVE-0-2018-6798
GCVE (VulDB): GCVE-100-116305

OVAL: 🔍

SecurityFocus: 103953 - Perl CVE-2018-6913 Heap Buffer Overflow Vulnerability
SecurityTracker: 1040681

See also: 🔍

Entryinfo

Created: 04/18/2018 10:15
Updated: 02/28/2023 12:05
Changes: 04/18/2018 10:15 (76), 01/25/2020 17:23 (5), 02/10/2021 09:24 (2), 02/28/2023 12:05 (3)
Complete: 🔍
Cache ID: 216:698:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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