Bug 2258013 (CVE-2023-6040)

Summary: CVE-2023-6040 kernel: netfilter: nf_tables: out-of-bounds access in nf_tables_newtable()
Product: [Other] Security Response Reporter: TEJ RATHI <trathi>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: acaringi, allarkin, bhu, chwhite, cye, cyin, dbohanno, debarbos, dfreiber, drow, dvlasenk, ezulian, hkrzesin, jarod, jburrell, jdenham, jfaracco, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, ldoskova, lgoncalv, lzampier, mmilgram, mstowell, nmurray, ptalbert, rparrazo, rrobaina, rvrbovsk, rysulliv, scweaver, tglozar, tyberry, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: kernel 5.18 Doc Type: If docs needed, set a value
Doc Text:
An out-of-bounds access vulnerability was found in the Linux Kernel. This issue occurs during the creation of a new netfilter table. The absence of safeguards in the nf_tables_newtable function against invalid nf_tables family (pf) values allows attackers to achieve unauthorized access. Exploitation occurs in two locations: the xt_find_target function in x_tables.c permits faking xt_af data, and the nf_logger_find_get function in nf_log.c can enable an attacker to use an invalid pf to dereference adjacent global data. By manipulating these values, an attacker could achieve unauthorized access beyond the intended boundaries.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2265572    
Bug Blocks: 2258026    

Description TEJ RATHI 2024-01-12 06:15:41 UTC 
An out-of-bounds access vulnerability involving netfilter was reported and fixed as: f1082dd31fe4 (netfilter: nf_tables: Reject tables of unsupported family); While creating a new netfilter table, lack of a safeguard against invalid nf_tables family (pf) values within `nf_tables_newtable` function enables an attacker to achieve out-of-bounds access.

Reference:
https://www.openwall.com/lists/oss-security/2024/01/12/1
Comment 1 TEJ RATHI 2024-01-12 06:30:49 UTC 
Upstream Commit: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f1082dd31fe461d482d69da2a8eccfeb7bf07ac2
Comment 3 Guilherme de Almeida Suckevicz 2024-02-22 19:15:56 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2265572]
Comment 4 Justin M. Forbes 2024-02-27 00:37:04 UTC 
This was fixed for Fedora in the 5.18 stable kernel rebases.
Comment 6 errata-xmlrpc 2024-04-30 10:15:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:2394 https://access.redhat.com/errata/RHSA-2024:2394