CVE-2011-1930
Description
In klibc 1.5.20 and 1.5.21, the DHCP options written by ipconfig to /tmp/net-$DEVICE.conf are not properly escaped. This may allow a remote attacker to send a specially crafted DHCP reply which could execute arbitrary code with the privileges of any process which sources DHCP options.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Exploit-DB
klibc 1.5.2 - DHCP Options Processing Remote Shell Command Execution
source: https://www.securityfocus.com/bid/47924/info
klibc is prone to a shell-command-execution vulnerability because the application fails to properly sanitize user-supplied input.
An attacker can exploit this issue to execute arbitrary shell commands in the context of the application that uses the vulnerable library.
Versions prior to klibc 1.5.22 are vulnerable.
DNSDOMAIN="\\\"\$(echo owned; touch /tmp/owned)" OS impact
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 1.5.22-1 |
| sid | Fixed | 1.5.22-1 |
| forky | Fixed | 1.5.22-1 |
| bullseye | Fixed | 1.5.22-1 |
| bookworm | Fixed | 1.5.22-1 |
References
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.