CVE-2024-4741

CVE Details

Release Date:

2024-05-28

Description

Issue summary: Calling the OpenSSL API function SSL_free_buffers may cause\nmemory to be accessed that was previously freed in some situations\nImpact summary: A use after free can have a range of potential consequences such\nas the corruption of valid data, crashes or execution of arbitrary code.\nHowever, only applications that directly call the SSL_free_buffers function are\naffected by this issue. Applications that do not call this function are not\nvulnerable. Our investigations indicate that this function is rarely used by\napplications.\nThe SSL_free_buffers function is used to free the internal OpenSSL buffer used\nwhen processing an incoming record from the network. The call is only expected\nto succeed if the buffer is not currently in use. However, two scenarios have\nbeen identified where the buffer is freed even when still in use.\nThe first scenario occurs where a record header has been received from the\nnetwork and processed by OpenSSL, but the full record body has not yet arrived.\nIn this case calling SSL_free_buffers will succeed even though a record has only\nbeen partially processed and the buffer is still in use.\nThe second scenario occurs where a full record containing application data has\nbeen received and processed by OpenSSL but the application has only read part of\nthis data. Again a call to SSL_free_buffers will succeed even though the buffer\nis still in use.\nWhile these scenarios could occur accidentally during normal operation a\nmalicious attacker could attempt to engineer a stituation where this occurs.\nWe are not aware of this issue being actively exploited.\nThe FIPS modules in 3.3, 3.2, 3.1 and 3.0 are not affected by this issue.

See more information about CVE-2024-4741 from MITRE CVE dictionary and NIST NVD

CVSS Scoring

NOTE: The following CVSS v3.1 metrics and score provided are preliminary and subject to review.

Base Score:	5.6	CVSS Vector:	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack Vector:	Network	Attack Complexity:	High
Privileges Required:	None	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	Low
Integrity Impact:	Low	Availability Impact:	Low

Errata information

Platform	Errata	Release Date
Oracle Linux version 9 (openssl)	ELSA-2024-9333	2024-11-14
Oracle Linux version 9 (openssl-fips-provider)	ELSA-2024-9333	2024-11-14