CVE-2020-11958 : re2c 1.3 has a heap-based buffer overflow in Scanner::fill in parse/scanner.cc v

re2c 1.3 has a heap-based buffer overflow in Scanner::fill in parse/scanner.cc via a long lexeme.

Published 2020-04-21 01:15:12

Updated 2023-01-27 18:38:44

Source MITRE

View at NVD, CVE.org

Vulnerability category: OverflowMemory Corruption

Products affected by CVE-2020-11958

Canonical » Ubuntu Linux » Version: 19.10
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 20.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
Matching versions
Re2c » Re2c » Version: 1.3
cpe:2.3:a:re2c:re2c:1.3:*:*:*:*:*:*:*
Matching versions

EPSS FAQ

0.17%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 53 %

Percentile, the proportion of vulnerabilities that are scored at or less

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
6.8	MEDIUM	AV:N/AC:M/Au:N/C:P/I:P/A:P	8.6	6.4	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
7.8	HIGH	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	1.8	5.9	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

Assigned by: nvd@nist.gov (Primary)

https://www.openwall.com/lists/oss-security/2020/04/19/1

oss-security - re2c: heap overflow in Scanner::fill (scanner.cc)
Mailing List;Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/04/21/1

oss-security - Re: re2c: heap overflow in Scanner::fill (scanner.cc)
Mailing List;Third Party Advisory
https://github.com/skvadrik/re2c/commit/c4603ba5ce229db83a2a4fb93e6d4b4e3ec3776a

Fix crash in lexer refill (reported by Agostino Sarubbo). · skvadrik/re2c@c4603ba · GitHub
Patch;Third Party Advisory
https://blogs.gentoo.org/ago/2020/04/19/re2c-heap-overflow-in-scannerfill-scanner-cc/

re2c: heap overflow in Scanner::fill (scanner.cc) | agostino's blog
Third Party Advisory
https://usn.ubuntu.com/4338-2/

USN-4338-2: re2c vulnerability | Ubuntu security notices
Third Party Advisory
https://security.gentoo.org/glsa/202007-28

re2c: Buffer overflow (GLSA 202007-28) — Gentoo security
Third Party Advisory
https://usn.ubuntu.com/4338-1/

USN-4338-1: re2c vulnerability | Ubuntu security notices
Third Party Advisory

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