Bug 2061541 (CVE-2022-26495) - CVE-2022-26495 nbd: heap-based buffer overflow in nbd-server.c
Summary: CVE-2022-26495 nbd: heap-based buffer overflow in nbd-server.c
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2022-26495
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2061886 2061887
Blocks: 2061543
TreeView+ depends on / blocked
 
Reported: 2022-03-07 19:23 UTC by Patrick Del Bello
Modified: 2022-03-08 20:49 UTC (History)
3 users (show)

Fixed In Version:
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Last Closed: 2022-03-08 20:49:39 UTC
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Description Patrick Del Bello 2022-03-07 19:23:26 UTC 
In nbd-server in nbd before 3.24, there is an integer overflow with a resultant heap-based buffer overflow. A value of 0xffffffff in the name length field will cause a zero-sized buffer to be allocated for the name, resulting in a write to a dangling pointer. This issue exists for the NBD_OPT_INFO, NBD_OPT_GO, and NBD_OPT_EXPORT_NAME messages.

https://sourceforge.net/projects/nbd/files/nbd/
https://lists.debian.org/nbd/2022/01/msg00037.html
Comment 1 Guilherme de Almeida Suckevicz 2022-03-08 16:56:14 UTC 
Created nbd tracking bugs for this issue:

Affects: epel-7 [bug 2061886]
Affects: fedora-all [bug 2061887]
Comment 2 Product Security DevOps Team 2022-03-08 20:49:37 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.
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