CVE-2023-52885

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Source
https://nvd.nist.gov/vuln/detail/CVE-2023-52885
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52885.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2023-52885
Related
Published
2024-07-14T08:15:01Z
Modified
2024-09-18T03:24:40.370099Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

SUNRPC: Fix UAF in svctcplistendataready()

After the listener svcsock is freed, and before invoking svctcpaccept() for the established child sock, there is a window that the newsock retaining a freed listener svcsock in skuserdata which cloning from parent. In the race window, if data is received on the newsock, we will observe use-after-free report in svctcplistendataready().

Reproduce by two tasks:

  1. while :; do rpc.nfsd 0 ; rpc.nfsd; done
  2. while :; do echo "" | ncat -4 127.0.0.1 2049 ; done

KASAN report:

================================================================== BUG: KASAN: slab-use-after-free in svctcplistendataready+0x1cf/0x1f0 [sunrpc] Read of size 8 at addr ffff888139d96228 by task nc/102553 CPU: 7 PID: 102553 Comm: nc Not tainted 6.3.0+ #18 Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020 Call Trace: <IRQ> dumpstacklvl+0x33/0x50 printaddressdescription.constprop.0+0x27/0x310 printreport+0x3e/0x70 kasanreport+0xae/0xe0 svctcplistendataready+0x1cf/0x1f0 [sunrpc] tcpdataqueue+0x9f4/0x20e0 tcprcvestablished+0x666/0x1f60 tcpv4dorcv+0x51c/0x850 tcpv4rcv+0x23fc/0x2e80 ipprotocoldeliverrcu+0x62/0x300 iplocaldeliverfinish+0x267/0x350 iplocaldeliver+0x18b/0x2d0 iprcv+0x2fb/0x370 _netifreceiveskbonecore+0x166/0x1b0 processbacklog+0x24c/0x5e0 _napipoll+0xa2/0x500 netrxaction+0x854/0xc90 _dosoftirq+0x1bb/0x5de do_softirq+0xcb/0x100 </IRQ> <TASK> ... </TASK>

Allocated by task 102371: kasansavestack+0x1e/0x40 kasansettrack+0x21/0x30 _kasankmalloc+0x7b/0x90 svcsetupsocket+0x52/0x4f0 [sunrpc] svcaddsock+0x20d/0x400 [sunrpc] _writeportsaddfd+0x209/0x390 [nfsd] writeports+0x239/0x2c0 [nfsd] nfsctltransactionwrite+0xac/0x110 [nfsd] vfswrite+0x1c3/0xae0 ksyswrite+0xed/0x1c0 dosyscall64+0x38/0x90 entrySYSCALL64after_hwframe+0x72/0xdc

Freed by task 102551: kasansavestack+0x1e/0x40 kasansettrack+0x21/0x30 kasansavefreeinfo+0x2a/0x50 _kasanslabfree+0x106/0x190 _kmemcachefree+0x133/0x270 svcxprtfree+0x1e2/0x350 [sunrpc] svcxprtdestroyall+0x25a/0x440 [sunrpc] nfsdput+0x125/0x240 [nfsd] nfsdsvc+0x2cb/0x3c0 [nfsd] writethreads+0x1ac/0x2a0 [nfsd] nfsctltransactionwrite+0xac/0x110 [nfsd] vfswrite+0x1c3/0xae0 ksyswrite+0xed/0x1c0 dosyscall64+0x38/0x90 entrySYSCALL64after_hwframe+0x72/0xdc

Fix the UAF by simply doing nothing in svctcplistendataready() if state != TCP_LISTEN, that will avoid dereferencing svsk for all child socket.

References

Affected packages

Debian:11 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.191-1

Affected versions

5.*

5.10.46-4
5.10.46-5
5.10.70-1~bpo10+1
5.10.70-1
5.10.84-1
5.10.92-1~bpo10+1
5.10.92-1
5.10.92-2
5.10.103-1~bpo10+1
5.10.103-1
5.10.106-1
5.10.113-1
5.10.120-1~bpo10+1
5.10.120-1
5.10.127-1
5.10.127-2~bpo10+1
5.10.127-2
5.10.136-1
5.10.140-1
5.10.148-1
5.10.149-1
5.10.149-2
5.10.158-1
5.10.158-2
5.10.162-1
5.10.178-1
5.10.178-2
5.10.178-3
5.10.179-1
5.10.179-2
5.10.179-3
5.10.179-4
5.10.179-5

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.1.52-1

Affected versions

6.*

6.1.27-1
6.1.37-1
6.1.38-1
6.1.38-2~bpo11+1
6.1.38-2
6.1.38-3
6.1.38-4~bpo11+1
6.1.38-4

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.4.4-1

Affected versions

6.*

6.1.27-1
6.1.37-1
6.1.38-1
6.1.38-2~bpo11+1
6.1.38-2
6.1.38-3
6.1.38-4~bpo11+1
6.1.38-4
6.1.52-1
6.1.55-1~bpo11+1
6.1.55-1
6.1.64-1
6.1.66-1
6.1.67-1
6.1.69-1~bpo11+1
6.1.69-1
6.1.76-1~bpo11+1
6.1.76-1
6.1.82-1
6.1.85-1
6.1.90-1~bpo11+1
6.1.90-1
6.1.94-1~bpo11+1
6.1.94-1
6.1.98-1
6.1.99-1
6.1.106-1
6.1.106-2
6.1.106-3
6.3.1-1~exp1
6.3.2-1~exp1
6.3.4-1~exp1
6.3.5-1~exp1
6.3.7-1~bpo12+1
6.3.7-1
6.3.11-1
6.4~rc6-1~exp1
6.4~rc7-1~exp1
6.4.1-1~exp1
6.4.4-1~bpo12+1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}