CVE-2015-5621
Description
The snmp_pdu_parse function in snmp_api.c in net-snmp 5.7.2 and earlier does not remove the varBind variable in a netsnmp_variable_list item when parsing of the SNMP PDU fails, which allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted packet.
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
net-snmp 5.7.3 - (Authenticated) Denial of Service (PoC)
OS impact
Arch Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Fixed | 5.8-1 |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 5.7.3+dfsg-1.1 |
| sid | Fixed | 5.7.3+dfsg-1.1 |
| forky | Fixed | 5.7.3+dfsg-1.1 |
| bullseye | Fixed | 5.7.3+dfsg-1.1 |
| bookworm | Fixed | 5.7.3+dfsg-1.1 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| net-snmp | net-snmp | {"endIncluding":"5.7.2"} | |
References
- https://security.archlinux.org/ASA-201810-11
- http://lists.opensuse.org/opensuse-updates/2015-09/msg00004.html
- http://rhn.redhat.com/errata/RHSA-2015-1636.html
- http://sourceforge.net/p/net-snmp/code/ci/f23bcd3ac6ddee5d0a48f9703007ccc738914791/
- http://support.citrix.com/article/CTX209443
- http://www.openwall.com/lists/oss-security/2015/04/13/1
- http://www.openwall.com/lists/oss-security/2015/04/16/15
- http://www.openwall.com/lists/oss-security/2015/07/31/1
- http://www.securityfocus.com/bid/76380
- http://www.securitytracker.com/id/1033304
- http://www.ubuntu.com/usn/USN-2711-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1212408
- https://cert-portal.siemens.com/productcert/pdf/ssa-978220.pdf
- https://sourceforge.net/p/net-snmp/bugs/2615/
- https://www.debian.org/security/2018/dsa-4154
- https://www.exploit-db.com/exploits/45547/
- https://security-tracker.debian.org/tracker/CVE-2015-5621
CWEs
CWE-19 CWE-190
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.