Vulnerability Details : CVE-2023-27585
PJSIP is a free and open source multimedia communication library written in C. A buffer overflow vulnerability in versions 2.13 and prior affects applications that use PJSIP DNS resolver. It doesn't affect PJSIP users who do not utilise PJSIP DNS resolver. This vulnerability is related to CVE-2022-24793. The difference is that this issue is in parsing the query record `parse_query()`, while the issue in CVE-2022-24793 is in `parse_rr()`. A patch is available as commit `d1c5e4d` in the `master` branch. A workaround is to disable DNS resolution in PJSIP config (by setting `nameserver_count` to zero) or use an external resolver implementation instead.
Vulnerability category: Overflow
Products affected by CVE-2023-27585
- cpe:2.3:a:teluu:pjsip:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-27585
1.00%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 84 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-27585
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
GitHub, Inc. |
CWE ids for CVE-2023-27585
-
The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.Assigned by: security-advisories@github.com (Primary)
-
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().Assigned by: security-advisories@github.com (Primary)
References for CVE-2023-27585
-
https://lists.debian.org/debian-lts-announce/2023/04/msg00020.html
[SECURITY] [DLA 3394-1] asterisk security update
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https://github.com/pjsip/pjproject/security/advisories/GHSA-p6g5-v97c-w5q4
Potential heap buffer overflow when parsing DNS packets · Advisory · pjsip/pjproject · GitHubVendor Advisory
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https://www.pjsip.org/pjlib-util/docs/html/group__PJ__DNS__RESOLVER.htm
DNS Asynchronous/Caching Resolution Engine (2.12)Product
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https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html
[SECURITY] [DLA 3549-1] ring security update
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https://github.com/pjsip/pjproject/security/advisories/GHSA-q9cp-8wcq-7pfr
Heap buffer overflow when parsing DNS packet (2) · Advisory · pjsip/pjproject · GitHubPatch;Vendor Advisory
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https://github.com/pjsip/pjproject/commit/d1c5e4da5bae7f220bc30719888bb389c905c0c5
Merge pull request from GHSA-q9cp-8wcq-7pfr · pjsip/pjproject@d1c5e4d · GitHubPatch
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https://www.debian.org/security/2023/dsa-5438
Debian -- Security Information -- DSA-5438-1 asterisk
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