NULL pointer dereference in Digium Asterisk
CVE-2019-13161
An issue was discovered in Asterisk Open Source through 13.27.0, 14.x and 15.x through 15.7.2, and 16.x through 16.4.0, and Certified Asterisk through 13.21-cert3. A pointer dereference in chan_sip while handling SDP negotiation allows an attacker to crash Asterisk when handling an SDP answer to an outgoing T.38 re-invite. To exploit this vulnerability an attacker must cause the chan_sip module to send a T.38 re-invite request to them. Upon receipt, the attacker must send an SDP answer containing both a T.38 UDPTL stream and another media stream containing only a codec (which is not permitted according to the chan_sip configuration).
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.040 (90.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 90.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.040 · newest: 0.040 · change: -0.000
Affected products
- Digium Asterisk
- Digium Certified Asterisk — versions 1.8.0.0, 1.8.1.0, 1.8.2.0
- Debian Linux — versions 8.0, 9.0
Weakness classification (CWE)
References
- downloads.digium.com/pub/security/AST-2019-003.html (Vendor Advisory)
- issues.asterisk.org/jira/browse/ASTERISK-28465 (Issue Tracking, Vendor Advisory)
- lists.debian.org/debian-lts-announce/2019/11/msg00038.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2022/04/msg00001.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-13161?
- CVE-2019-13161 is a medium-severity vulnerability in Digium Asterisk, classified under NULL Pointer Dereference. CVSS score: 5.3/10. Published 2019-07-12.
- How severe is CVE-2019-13161?
- Medium severity. CVSS v3 base score is 5.3 out of 10.