Bug 2254395 (CVE-2023-6779)

Summary: CVE-2023-6779 glibc: off-by-one heap-based buffer overflow in __vsyslog_internal()
Product: [Other] Security Response Reporter: Guilherme de Almeida Suckevicz <gsuckevi>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: aarif, adudiak, agarcial, aoconnor, apatel, aprice, asegurap, ashankar, bdettelb, caswilli, codonell, dfreiber, dj, dkuc, drow, fjansen, fweimer, ganandan, ggastald, gsuckevi, hkataria, jburrell, jmitchel, jsamir, jsherril, jtanner, kaycoth, kgaikwad, kshier, luizcosta, mpierce, nweather, omaciel, orabin, pfrankli, sbiarozk, security-response-team, sipoyare, stcannon, sthirugn, supatil, tsasak, vkrizan, vkumar, vmugicag, yguenane
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: glibc 2.39 Doc Type: If docs needed, set a value
Doc Text:
An off-by-one heap-based buffer overflow was found in the __vsyslog_internal function of the glibc library. This function is called by the syslog and vsyslog functions. This issue occurs when these functions are called with a message bigger than INT_MAX bytes, leading to an incorrect calculation of the buffer size to store the message, resulting in an application crash. This issue affects glibc 2.37 and newer.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2261988    
Bug Blocks: 2249054    

Description Guilherme de Almeida Suckevicz 2023-12-13 18:28:56 UTC 
An off-by-one heap-based buffer overflow was found in the __vsyslog_internal function of the glibc library. This function is called by the syslog and vsyslog functions. This issue occurs when these functions are called with a message bigger than INT_MAX bytes, leading to an incorrect calculation of the buffer size to store the message, resulting in an application crash. This issue affects glibc 2.37 and newer.
Comment 1 Guilherme de Almeida Suckevicz 2024-01-30 18:46:46 UTC 
Created glibc tracking bugs for this issue:

Affects: fedora-all [bug 2261988]