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CVE-2023-52832

Disclosure Date: May 21, 2024 •
CVE-2023-52832
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Description

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

wifi: mac80211: don’t return unset power in ieee80211_get_tx_power()

We can get a UBSAN warning if ieee80211_get_tx_power() returns the
INT_MIN value mac80211 internally uses for “unset power level”.

UBSAN: signed-integer-overflow in net/wireless/nl80211.c:3816:5
-2147483648 * 100 cannot be represented in type ‘int’
CPU: 0 PID: 20433 Comm: insmod Tainted: G WC OE
Call Trace:
dump_stack+0x74/0x92
ubsan_epilogue+0x9/0x50
handle_overflow+0x8d/0xd0
__ubsan_handle_mul_overflow+0xe/0x10
nl80211_send_iface+0x688/0x6b0 [cfg80211]
[…]
cfg80211_register_wdev+0x78/0xb0 [cfg80211]
cfg80211_netdev_notifier_call+0x200/0x620 [cfg80211]
[…]
ieee80211_if_add+0x60e/0x8f0 [mac80211]
ieee80211_register_hw+0xda5/0x1170 [mac80211]

In this case, simply return an error instead, to indicate
that no data is available.

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CVSS V3 Severity and Metrics
Base Score:
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Impact Score:
Unknown
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Vector:
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Attack Vector (AV):
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Attack Complexity (AC):
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Privileges Required (PR):
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User Interaction (UI):
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Scope (S):
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Confidentiality (C):
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Integrity (I):
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Availability (A):
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General Information

Offensive Application
Unknown
Utility Class
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Ports
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OS
Unknown
Vulnerable Versions
Linux 1571120c44db
Linux not down converted
Prerequisites
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Discovered By
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PoC Author
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Metasploit Module
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Reporter
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Vendors

  • Linux

Products

  • Linux
Technical Analysis